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THE CMS DETECTOR
Illuminating! Counting LHC collisions with CMS. In the LHC, groups of 100 billion protons collide 25 million times every second. But most of these protons miss, so each time we point the protons at each other doesn't give us 100 million proton-proton collisions. In fact, collisions are much, much. HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on the HADRON CALORIMETER NEXT-GENERATION CLOCK CONTROL MODULE Known as a next-generation Clock and Control Module (ngCCM), the unit is one of 36 identical devices that orchestrate data transmission for the HCAL Endcap on-detector electronics. The affected module was removed and tested in 2019, but no cause for failure was found. Later that year, communication to another ngCCM was inexplicably lost. CMS WOMEN SCIENTISTS Barbara Alvarez Gonzalez, Researcher at Universidad de Oviedo, Spain. Proud to be a scientists because science benefits society and small steps in science will make a difference. Carina Brandt. Carina Brandt, currently master student at the University of Hamburg in Germany at the CMS group of Peter Schleper. HUNTING LEPTOQUARKS WITH THE CMS EXPERIMENT The CMS experiment has an extensive program to investigate leptoquarks under different hypotheses, and if such a particle exists, it will be revealed in future studies! Figure 2 contains only the data that was collected in 2016 through 2018, and the LHC is expected to produce at least a factor 20 data more in its lifetime. With the future runsCMS DETECTOR DESIGN
CMS Detector Design. Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentum of each one. CMS needed: a high performance system to detect and measure muons, a high resolution method to detect and measure electrons and photons (an electromagnetic calorimeter), a highMUON TOMOGRAPHY
Muon Tomography. Every second of every day, we are bombarded with thousands of particles that pass through our bodies without us noticing. Many of these particles are muons, second-generation leptons that are produced by cosmic rays and reach Earth’s surface at aDETECTING MUONS
A muon, in the plane perpendicular to the LHC beams, leaves a curved trajectory in four layers of muon detectors ("stations") . As the name “Compact Muon Solenoid” suggests, detecting muons is one of CMS’s most important tasks. Muons are charged particles that DETECTING DARK MATTER Detecting Dark Matter. Evidence from the depths of the Universe has ruled out a number of models for what the mysterious dark matter might be, but one candidate that fits so far is the lightest supersymmetric particle (LSP) otherwise known as the “neutralino”, the lightest of a whole range of new particles suggested by a theory called DO WE REALLY LIVE IN ONLY THREE DIMENSIONS?THE CMS DETECTOR
Illuminating! Counting LHC collisions with CMS. In the LHC, groups of 100 billion protons collide 25 million times every second. But most of these protons miss, so each time we point the protons at each other doesn't give us 100 million proton-proton collisions. In fact, collisions are much, much. HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on the HADRON CALORIMETER NEXT-GENERATION CLOCK CONTROL MODULE Known as a next-generation Clock and Control Module (ngCCM), the unit is one of 36 identical devices that orchestrate data transmission for the HCAL Endcap on-detector electronics. The affected module was removed and tested in 2019, but no cause for failure was found. Later that year, communication to another ngCCM was inexplicably lost. CMS WOMEN SCIENTISTS Barbara Alvarez Gonzalez, Researcher at Universidad de Oviedo, Spain. Proud to be a scientists because science benefits society and small steps in science will make a difference. Carina Brandt. Carina Brandt, currently master student at the University of Hamburg in Germany at the CMS group of Peter Schleper. HUNTING LEPTOQUARKS WITH THE CMS EXPERIMENT The CMS experiment has an extensive program to investigate leptoquarks under different hypotheses, and if such a particle exists, it will be revealed in future studies! Figure 2 contains only the data that was collected in 2016 through 2018, and the LHC is expected to produce at least a factor 20 data more in its lifetime. With the future runsCMS DETECTOR DESIGN
CMS Detector Design. Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentum of each one. CMS needed: a high performance system to detect and measure muons, a high resolution method to detect and measure electrons and photons (an electromagnetic calorimeter), a highMUON TOMOGRAPHY
Muon Tomography. Every second of every day, we are bombarded with thousands of particles that pass through our bodies without us noticing. Many of these particles are muons, second-generation leptons that are produced by cosmic rays and reach Earth’s surface at aDETECTING MUONS
A muon, in the plane perpendicular to the LHC beams, leaves a curved trajectory in four layers of muon detectors ("stations") . As the name “Compact Muon Solenoid” suggests, detecting muons is one of CMS’s most important tasks. Muons are charged particles that DETECTING DARK MATTER Detecting Dark Matter. Evidence from the depths of the Universe has ruled out a number of models for what the mysterious dark matter might be, but one candidate that fits so far is the lightest supersymmetric particle (LSP) otherwise known as the “neutralino”, the lightest of a whole range of new particles suggested by a theory called DO WE REALLY LIVE IN ONLY THREE DIMENSIONS?ON-SITE VISITS
167503. CMS is the only experiment where you can visit the underground facilities during the LHC running period. After a short introduction, groups are guided by a CMS engineer or physicist through the construction hall where the 15 sections of CMS were lowered 100 meters into the underground cavern, near Cessy, France. You will have theCMS AWARDS 2020
Congratulations to CMS members who have received the CMS Award for 2020! As is the tradition, every year during the February CMS week, members of the CMS collaboration are presented with awards for their incredible contributions and dedication to the CMS experiment. CMS SCIENTIFIC RESULTS The complete list of publications is here. Preliminary results on collision data at 0.9, 2.36, 7, and 8 TeV are described in Physics Analysis Summaries; Monte Carlo studies can be found here. Public performance plots are shown in Detector Performance Summaries. For any questions, please contact the CMS Physics Coordinators, cms-physicsHOW TO JOIN CMS
Types of Membership. There are three ways in which institutes can participate in CMS. An institute with FULL MEMBERSHIP profits from being a member of a leading international scientific community, by taking part in technology development, data processing and computing, and physics analysis. For institutes wishing to join the collaboration, but whose resources initially preclude full membership HADRON CALORIMETER NEXT-GENERATION CLOCK CONTROL MODULE Known as a next-generation Clock and Control Module (ngCCM), the unit is one of 36 identical devices that orchestrate data transmission for the HCAL Endcap on-detector electronics. The affected module was removed and tested in 2019, but no cause for failure was found. Later that year, communication to another ngCCM was inexplicably lost.CMS GEMS SHINE ON!
This five-row, three-column detector stand has everything that’s needed to simulate the working conditions of the CMS GE1/1 chambers. With all of the same data, voltage, and cooling connections as in CMS, the QC8 stand allows the researchers to take cosmic muon data with up to 30 GEM chambers at a time. QC8 consists of a series of tests which LOW-ENERGY LEPTONS FOR HIGH-ENERGY PHYSICS High-energy muons may be the easiest-to-measure particles at CMS (the experiment is, after all, the Compact MUON Solenoid). However, measurements of low-energy leptons must contend with a highly-challenging source of backgrounds. Heavy hadrons, cousins of the proton and neutron, are produced copiously in LHC collisions andcan decay to muons
IT`S NEVER TOO LATE FOR PHOTONS AT CMS! The photon arrived at the ECAL 1.91 nanoseconds after the proton-proton collision in the LHC occurred. Figure 3 shows how sensitive the CMS experiment is to delayed photons in terms of the mass of the neutralino and proper lifetime. The values of the masses and lifetimes to the left of the black curve in the figure are thoseexcluded by this
UNEXPLAINED LONG-RANGE CORRELATIONS OBSERVED IN PPB The arrow shows the long-range correlations at small Δφ. CMS has published its first paper on proton-lead (pPb) collisions, describing the observation of a phenomenon that was previously seen first in nucleus-nucleus collisions but also detected by CMS in proton-proton (pp) collisions. The effect is a correlation between pairs ofparticles
ARE THERE MORE PARTICLES LEFT TO FIND? Supersymmetry: Uniting the forces Towards a superforce. Our understanding of the workings of the Universe often progress when unexpected connections are found between what appeared at first to beseparate entities.
THE CMS DETECTOR
Illuminating! Counting LHC collisions with CMS. In the LHC, groups of 100 billion protons collide 25 million times every second. But most of these protons miss, so each time we point the protons at each other doesn't give us 100 million proton-proton collisions. In fact, collisions are much, much. HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on the HADRON CALORIMETER NEXT-GENERATION CLOCK CONTROL MODULE Known as a next-generation Clock and Control Module (ngCCM), the unit is one of 36 identical devices that orchestrate data transmission for the HCAL Endcap on-detector electronics. The affected module was removed and tested in 2019, but no cause for failure was found. Later that year, communication to another ngCCM was inexplicably lost. CMS WOMEN SCIENTISTS Barbara Alvarez Gonzalez, Researcher at Universidad de Oviedo, Spain. Proud to be a scientists because science benefits society and small steps in science will make a difference. Carina Brandt. Carina Brandt, currently master student at the University of Hamburg in Germany at the CMS group of Peter Schleper. HUNTING LEPTOQUARKS WITH THE CMS EXPERIMENT The CMS experiment has an extensive program to investigate leptoquarks under different hypotheses, and if such a particle exists, it will be revealed in future studies! Figure 2 contains only the data that was collected in 2016 through 2018, and the LHC is expected to produce at least a factor 20 data more in its lifetime. With the future runsCMS DETECTOR DESIGN
CMS Detector Design. Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentum of each one. CMS needed: a high performance system to detect and measure muons, a high resolution method to detect and measure electrons and photons (an electromagnetic calorimeter), a highMUON TOMOGRAPHY
Muon Tomography. Every second of every day, we are bombarded with thousands of particles that pass through our bodies without us noticing. Many of these particles are muons, second-generation leptons that are produced by cosmic rays and reach Earth’s surface at aDETECTING MUONS
A muon, in the plane perpendicular to the LHC beams, leaves a curved trajectory in four layers of muon detectors ("stations") . As the name “Compact Muon Solenoid” suggests, detecting muons is one of CMS’s most important tasks. Muons are charged particles that DETECTING DARK MATTER Detecting Dark Matter. Evidence from the depths of the Universe has ruled out a number of models for what the mysterious dark matter might be, but one candidate that fits so far is the lightest supersymmetric particle (LSP) otherwise known as the “neutralino”, the lightest of a whole range of new particles suggested by a theory called DO WE REALLY LIVE IN ONLY THREE DIMENSIONS?THE CMS DETECTOR
Illuminating! Counting LHC collisions with CMS. In the LHC, groups of 100 billion protons collide 25 million times every second. But most of these protons miss, so each time we point the protons at each other doesn't give us 100 million proton-proton collisions. In fact, collisions are much, much. HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on the HADRON CALORIMETER NEXT-GENERATION CLOCK CONTROL MODULE Known as a next-generation Clock and Control Module (ngCCM), the unit is one of 36 identical devices that orchestrate data transmission for the HCAL Endcap on-detector electronics. The affected module was removed and tested in 2019, but no cause for failure was found. Later that year, communication to another ngCCM was inexplicably lost. CMS WOMEN SCIENTISTS Barbara Alvarez Gonzalez, Researcher at Universidad de Oviedo, Spain. Proud to be a scientists because science benefits society and small steps in science will make a difference. Carina Brandt. Carina Brandt, currently master student at the University of Hamburg in Germany at the CMS group of Peter Schleper. HUNTING LEPTOQUARKS WITH THE CMS EXPERIMENT The CMS experiment has an extensive program to investigate leptoquarks under different hypotheses, and if such a particle exists, it will be revealed in future studies! Figure 2 contains only the data that was collected in 2016 through 2018, and the LHC is expected to produce at least a factor 20 data more in its lifetime. With the future runsCMS DETECTOR DESIGN
CMS Detector Design. Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentum of each one. CMS needed: a high performance system to detect and measure muons, a high resolution method to detect and measure electrons and photons (an electromagnetic calorimeter), a highMUON TOMOGRAPHY
Muon Tomography. Every second of every day, we are bombarded with thousands of particles that pass through our bodies without us noticing. Many of these particles are muons, second-generation leptons that are produced by cosmic rays and reach Earth’s surface at aDETECTING MUONS
A muon, in the plane perpendicular to the LHC beams, leaves a curved trajectory in four layers of muon detectors ("stations") . As the name “Compact Muon Solenoid” suggests, detecting muons is one of CMS’s most important tasks. Muons are charged particles that DETECTING DARK MATTER Detecting Dark Matter. Evidence from the depths of the Universe has ruled out a number of models for what the mysterious dark matter might be, but one candidate that fits so far is the lightest supersymmetric particle (LSP) otherwise known as the “neutralino”, the lightest of a whole range of new particles suggested by a theory called DO WE REALLY LIVE IN ONLY THREE DIMENSIONS?ON-SITE VISITS
167503. CMS is the only experiment where you can visit the underground facilities during the LHC running period. After a short introduction, groups are guided by a CMS engineer or physicist through the construction hall where the 15 sections of CMS were lowered 100 meters into the underground cavern, near Cessy, France. You will have theCMS AWARDS 2020
Congratulations to CMS members who have received the CMS Award for 2020! As is the tradition, every year during the February CMS week, members of the CMS collaboration are presented with awards for their incredible contributions and dedication to the CMS experiment. CMS SCIENTIFIC RESULTS The complete list of publications is here. Preliminary results on collision data at 0.9, 2.36, 7, and 8 TeV are described in Physics Analysis Summaries; Monte Carlo studies can be found here. Public performance plots are shown in Detector Performance Summaries. For any questions, please contact the CMS Physics Coordinators, cms-physicsHOW TO JOIN CMS
Types of Membership. There are three ways in which institutes can participate in CMS. An institute with FULL MEMBERSHIP profits from being a member of a leading international scientific community, by taking part in technology development, data processing and computing, and physics analysis. For institutes wishing to join the collaboration, but whose resources initially preclude full membership HADRON CALORIMETER NEXT-GENERATION CLOCK CONTROL MODULE Known as a next-generation Clock and Control Module (ngCCM), the unit is one of 36 identical devices that orchestrate data transmission for the HCAL Endcap on-detector electronics. The affected module was removed and tested in 2019, but no cause for failure was found. Later that year, communication to another ngCCM was inexplicably lost.CMS GEMS SHINE ON!
This five-row, three-column detector stand has everything that’s needed to simulate the working conditions of the CMS GE1/1 chambers. With all of the same data, voltage, and cooling connections as in CMS, the QC8 stand allows the researchers to take cosmic muon data with up to 30 GEM chambers at a time. QC8 consists of a series of tests which LOW-ENERGY LEPTONS FOR HIGH-ENERGY PHYSICS High-energy muons may be the easiest-to-measure particles at CMS (the experiment is, after all, the Compact MUON Solenoid). However, measurements of low-energy leptons must contend with a highly-challenging source of backgrounds. Heavy hadrons, cousins of the proton and neutron, are produced copiously in LHC collisions andcan decay to muons
IT`S NEVER TOO LATE FOR PHOTONS AT CMS! The photon arrived at the ECAL 1.91 nanoseconds after the proton-proton collision in the LHC occurred. Figure 3 shows how sensitive the CMS experiment is to delayed photons in terms of the mass of the neutralino and proper lifetime. The values of the masses and lifetimes to the left of the black curve in the figure are thoseexcluded by this
UNEXPLAINED LONG-RANGE CORRELATIONS OBSERVED IN PPB The arrow shows the long-range correlations at small Δφ. CMS has published its first paper on proton-lead (pPb) collisions, describing the observation of a phenomenon that was previously seen first in nucleus-nucleus collisions but also detected by CMS in proton-proton (pp) collisions. The effect is a correlation between pairs ofparticles
ARE THERE MORE PARTICLES LEFT TO FIND? Supersymmetry: Uniting the forces Towards a superforce. Our understanding of the workings of the Universe often progress when unexpected connections are found between what appeared at first to beseparate entities.
THE CMS DETECTOR
Illuminating! Counting LHC collisions with CMS. In the LHC, groups of 100 billion protons collide 25 million times every second. But most of these protons miss, so each time we point the protons at each other doesn't give us 100 million proton-proton collisions. In fact, collisions are much, much. CMS SCIENTIFIC RESULTS The complete list of publications is here. Preliminary results on collision data at 0.9, 2.36, 7, and 8 TeV are described in Physics Analysis Summaries; Monte Carlo studies can be found here. Public performance plots are shown in Detector Performance Summaries. For any questions, please contact the CMS Physics Coordinators, cms-physics HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on the UNEXPLAINED LONG-RANGE CORRELATIONS OBSERVED IN PPBSEE MORE ONCMS.CERN
MUON TOMOGRAPHY
Muon Tomography. Every second of every day, we are bombarded with thousands of particles that pass through our bodies without us noticing. Many of these particles are muons, second-generation leptons that are produced by cosmic rays and reach Earth’s surface at aCMS DETECTOR DESIGN
CMS Detector Design. Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentum of each one. CMS needed: a high performance system to detect and measure muons, a high resolution method to detect and measure electrons and photons (an electromagnetic calorimeter), a high HUNTING LEPTOQUARKS WITH THE CMS EXPERIMENT The CMS experiment has an extensive program to investigate leptoquarks under different hypotheses, and if such a particle exists, it will be revealed in future studies! Figure 2 contains only the data that was collected in 2016 through 2018, and the LHC is expected to produce at least a factor 20 data more in its lifetime. With the future runs THE FORWARD SHIELDING UPGRADE: A REAL ENGINEERING In the present CMS design, the Forward Shielding stops these particles, whilst allowing access to the beam-pipe components whenever needed for maintenance or repair activity. This important shielding is made of the called Fixed Iron Nose (FIN) and a double-hinged rotable element (the Rotating Shielding). Data from CMS muon chambers showthat
ACHIEVEMENT AWARDS
Achievement Awards. Begun in 2007, the annual Achievement Awards honor individuals who have distinguished themselves by performing significant and lasting contributions to different components of the CMS experiment. On the right, you can find the names and DETECTING DARK MATTER Detecting Dark Matter. Evidence from the depths of the Universe has ruled out a number of models for what the mysterious dark matter might be, but one candidate that fits so far is the lightest supersymmetric particle (LSP) otherwise known as the “neutralino”, the lightest of a whole range of new particles suggested by a theory calledTHE CMS DETECTOR
Illuminating! Counting LHC collisions with CMS. In the LHC, groups of 100 billion protons collide 25 million times every second. But most of these protons miss, so each time we point the protons at each other doesn't give us 100 million proton-proton collisions. In fact, collisions are much, much. CMS SCIENTIFIC RESULTS The complete list of publications is here. Preliminary results on collision data at 0.9, 2.36, 7, and 8 TeV are described in Physics Analysis Summaries; Monte Carlo studies can be found here. Public performance plots are shown in Detector Performance Summaries. For any questions, please contact the CMS Physics Coordinators, cms-physics HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on the UNEXPLAINED LONG-RANGE CORRELATIONS OBSERVED IN PPBSEE MORE ONCMS.CERN
MUON TOMOGRAPHY
Muon Tomography. Every second of every day, we are bombarded with thousands of particles that pass through our bodies without us noticing. Many of these particles are muons, second-generation leptons that are produced by cosmic rays and reach Earth’s surface at aCMS DETECTOR DESIGN
CMS Detector Design. Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentum of each one. CMS needed: a high performance system to detect and measure muons, a high resolution method to detect and measure electrons and photons (an electromagnetic calorimeter), a high HUNTING LEPTOQUARKS WITH THE CMS EXPERIMENT The CMS experiment has an extensive program to investigate leptoquarks under different hypotheses, and if such a particle exists, it will be revealed in future studies! Figure 2 contains only the data that was collected in 2016 through 2018, and the LHC is expected to produce at least a factor 20 data more in its lifetime. With the future runs THE FORWARD SHIELDING UPGRADE: A REAL ENGINEERING In the present CMS design, the Forward Shielding stops these particles, whilst allowing access to the beam-pipe components whenever needed for maintenance or repair activity. This important shielding is made of the called Fixed Iron Nose (FIN) and a double-hinged rotable element (the Rotating Shielding). Data from CMS muon chambers showthat
ACHIEVEMENT AWARDS
Achievement Awards. Begun in 2007, the annual Achievement Awards honor individuals who have distinguished themselves by performing significant and lasting contributions to different components of the CMS experiment. On the right, you can find the names and DETECTING DARK MATTER Detecting Dark Matter. Evidence from the depths of the Universe has ruled out a number of models for what the mysterious dark matter might be, but one candidate that fits so far is the lightest supersymmetric particle (LSP) otherwise known as the “neutralino”, the lightest of a whole range of new particles suggested by a theory calledTHE CMS DETECTOR
Illuminating! Counting LHC collisions with CMS. In the LHC, groups of 100 billion protons collide 25 million times every second. But most of these protons miss, so each time we point the protons at each other doesn't give us 100 million proton-proton collisions. In fact, collisions are much, much.CMS AWARDS 2020
Congratulations to CMS members who have received the CMS Award for 2020! As is the tradition, every year during the February CMS week, members of the CMS collaboration are presented with awards for their incredible contributions and dedication to the CMS experiment.ON-SITE VISITS
167503. CMS is the only experiment where you can visit the underground facilities during the LHC running period. After a short introduction, groups are guided by a CMS engineer or physicist through the construction hall where the 15 sections of CMS were lowered 100 meters into the underground cavern, near Cessy, France. You will have the CMS SCIENTIFIC RESULTS The complete list of publications is here. Preliminary results on collision data at 0.9, 2.36, 7, and 8 TeV are described in Physics Analysis Summaries; Monte Carlo studies can be found here. Public performance plots are shown in Detector Performance Summaries. For any questions, please contact the CMS Physics Coordinators, cms-physics USING MACHINE LEARNING TO IMPROVE THE DETECTION OF NEW Using machine learning to improve the detection of new physics in the interactions of the top quark Although our theory describing the interactions between fundamental particles is exceptionally successful, it has weaknesses. HADRON CALORIMETER NEXT-GENERATION CLOCK CONTROL MODULE Known as a next-generation Clock and Control Module (ngCCM), the unit is one of 36 identical devices that orchestrate data transmission for the HCAL Endcap on-detector electronics. The affected module was removed and tested in 2019, but no cause for failure was found. Later that year, communication to another ngCCM was inexplicably lost. HUNTING LEPTOQUARKS WITH THE CMS EXPERIMENT The CMS experiment has an extensive program to investigate leptoquarks under different hypotheses, and if such a particle exists, it will be revealed in future studies! Figure 2 contains only the data that was collected in 2016 through 2018, and the LHC is expected to produce at least a factor 20 data more in its lifetime. With the future runs DO WE REALLY LIVE IN ONLY THREE DIMENSIONS? Secret dimensions. In everyday life, we inhabit a space of three dimensions – a vast ‘cupboard’ with height, width and depth, well known for centuries. Less obviously, we can consider time as an additional, fourth dimension, as Einstein famously revealed. But just as we are becoming more used to the idea of four dimensions, sometheorists
RESISTIVE PLATE CHAMBERS Resistive plate chambers (RPC) are fast gaseous detectors that provide a muon trigger system parallel with those of the DTs and CSCs. RPCs consist of two parallel plates, a positively-charged anode and a negatively-charged cathode, both made of a very high resistivity IT`S NEVER TOO LATE FOR PHOTONS AT CMS! The photon arrived at the ECAL 1.91 nanoseconds after the proton-proton collision in the LHC occurred. Figure 3 shows how sensitive the CMS experiment is to delayed photons in terms of the mass of the neutralino and proper lifetime. The values of the masses and lifetimes to the left of the black curve in the figure are thoseexcluded by this
THE CMS DETECTOR
A shot in the dark: Can jets recoil against Dark Matter? In their 2020 hit single ‘A Shot in the Dark’ the rock band AC/DC got it right in many ways: “A shot in the dark Make you feel alright A shot in the dark All through the whole night” The autCMS AWARDS 2020
Congratulations to CMS members who have received the CMS Award for 2020! As is the tradition, every year during the February CMS week, members of the CMS collaboration are presented with awards for their incredible contributions and dedication to the CMS experiment.CMS GEMS SHINE ON!
Since late May, with the incremental re-opening of CERN’s facilities, members of the CMS GEM project have been hard at work restarting the laboratory activities in preparation for the continued efforts towards the GE1/1 chambers installation.CMS DETECTOR DESIGN
Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentumof each one.
HOW MANY HIGGS BOSONS ARE THERE? A display of an event with two b-quark jets (orange cones to the top) and two tau lepton decays, one decaying into a muon (red line) and the other decaying into pions (pink cone).MUON TOMOGRAPHY
Muon Tomography. Every second of every day, we are bombarded with thousands of particles that pass through our bodies without us noticing. Many of these particles are muons, second-generation leptons that are produced by cosmic rays and reach Earth’s surface at a UNDER THE RADAR: SEARCHING FOR STEALTHY NEW PARTICLES The standard model of particle physics encapsulates our current knowledge of elementary particles and their interactions. The standard model is not complete; for example, it does not describe observations such as gravity, has no prediction for dark matter, which makes up most of the matter in the universe, or that neutrinos have mass. LOW-ENERGY LEPTONS FOR HIGH-ENERGY PHYSICS A reconstructed event that passes all of the Higgsino search selection criteria. Two energetic jets (orange cones) containing charged particle tracks (yellow) and deposits in the hadronic calorimeters (blue) recoil against the inferred missing energy (purple arrow). DO WE REALLY LIVE IN ONLY THREE DIMENSIONS? UNEXPLAINED LONG-RANGE CORRELATIONS OBSERVED IN PPBSEE MORE ONCMS.CERN
THE CMS DETECTOR
A shot in the dark: Can jets recoil against Dark Matter? In their 2020 hit single ‘A Shot in the Dark’ the rock band AC/DC got it right in many ways: “A shot in the dark Make you feel alright A shot in the dark All through the whole night” The autCMS AWARDS 2020
Congratulations to CMS members who have received the CMS Award for 2020! As is the tradition, every year during the February CMS week, members of the CMS collaboration are presented with awards for their incredible contributions and dedication to the CMS experiment.CMS GEMS SHINE ON!
Since late May, with the incremental re-opening of CERN’s facilities, members of the CMS GEM project have been hard at work restarting the laboratory activities in preparation for the continued efforts towards the GE1/1 chambers installation.CMS DETECTOR DESIGN
Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentumof each one.
HOW MANY HIGGS BOSONS ARE THERE? A display of an event with two b-quark jets (orange cones to the top) and two tau lepton decays, one decaying into a muon (red line) and the other decaying into pions (pink cone).MUON TOMOGRAPHY
Muon Tomography. Every second of every day, we are bombarded with thousands of particles that pass through our bodies without us noticing. Many of these particles are muons, second-generation leptons that are produced by cosmic rays and reach Earth’s surface at a UNDER THE RADAR: SEARCHING FOR STEALTHY NEW PARTICLES The standard model of particle physics encapsulates our current knowledge of elementary particles and their interactions. The standard model is not complete; for example, it does not describe observations such as gravity, has no prediction for dark matter, which makes up most of the matter in the universe, or that neutrinos have mass. LOW-ENERGY LEPTONS FOR HIGH-ENERGY PHYSICS A reconstructed event that passes all of the Higgsino search selection criteria. Two energetic jets (orange cones) containing charged particle tracks (yellow) and deposits in the hadronic calorimeters (blue) recoil against the inferred missing energy (purple arrow). DO WE REALLY LIVE IN ONLY THREE DIMENSIONS? UNEXPLAINED LONG-RANGE CORRELATIONS OBSERVED IN PPBSEE MORE ONCMS.CERN
CMS SCIENTIFIC RESULTS General Information. All results are available here and in particular . the Run1 results are available here; the Run2 results are available here; and Preliminary results are available here; Furthermore, CMS public results can also be found in CDS , and are categorized by subject (group) in this page. Publications and preprints on collision data, ordered by time, are available at this link.COLLABORATION
The CMS Collaboration brings together members of the particle physics community from across the globe in a quest to advance humanity’s knowledge of the very basic laws of our Universe. WHAT DOES THE DECAY OF A BOTTOM QUARK LOOK LIKE? Figure 1: Interactive (try zooming/rotating!) event display of a 13 TeV proton-proton collision in the CMS detector during 2016. The figure shows the particles emerging from the production of a pair of top quarks, which in turn decay into two W bosons and two b-quarks.HOW TO JOIN CMS
Types of Membership. There are three ways in which institutes can participate in CMS. An institute with FULL MEMBERSHIP profits from being a member of a leading international scientific community, by taking part in technology development, data processing and computing, and physics analysis. For institutes wishing to join the collaboration, but whose resources initially preclude full membership USING THE GOLDEN DECAY CHANNEL TO UNDERSTAND THE Using the golden decay channel to understand the production of the Higgs boson. The standard model of particle physics is currently the best way to describe interactions of fundamental particles that USING MACHINE LEARNING TO IMPROVE THE DETECTION OF NEW Using machine learning to improve the detection of new physics in the interactions of the top quark Although our theory describing the interactions between fundamental particles is exceptionally successful, it has weaknesses. UNDER THE RADAR: SEARCHING FOR STEALTHY NEW PARTICLES The standard model of particle physics encapsulates our current knowledge of elementary particles and their interactions. The standard model is not complete; for example, it does not describe observations such as gravity, has no prediction for dark matter, which makes up most of the matter in the universe, or that neutrinos have mass. WHAT AND WHERE IS ANTIMATTER? Antimatter detectives. The antimatter is missing – not from CERN, but from the Universe! At least that is what we can deduce so far from careful examination of the evidence. LOW-ENERGY LEPTONS FOR HIGH-ENERGY PHYSICS A reconstructed event that passes all of the Higgsino search selection criteria. Two energetic jets (orange cones) containing charged particle tracks (yellow) and deposits in the hadronic calorimeters (blue) recoil against the inferred missing energy (purple arrow). UNEXPLAINED LONG-RANGE CORRELATIONS OBSERVED IN PPB Figure 1: Two-particle correlation functions for 7 TeV pp (a), 2.76 TeV PbPb (b), and 5.02 TeV pPb (c) collisions. The arrow shows the long-range correlations at small Δφ.THE CMS DETECTOR
Illuminating! Counting LHC collisions with CMS. In the LHC, groups of 100 billion protons collide 25 million times every second. But most of these protons miss, so each time we point the protons at each other doesn't give us 100 million proton-proton collisions. In fact, collisions are much, much.CMS AWARDS 2020
Congratulations to CMS members who have received the CMS Award for 2020! As is the tradition, every year during the February CMS week, members of the CMS collaboration are presented with awards for their incredible contributions and dedication to the CMS experiment. WHAT DOES THE DECAY OF A BOTTOM QUARK LOOK LIKE? Figure 1: Interactive (try zooming/rotating!) event display of a 13 TeV proton-proton collision in the CMS detector during 2016. The figure shows the particles emerging from the production of a pair of top quarks, which in turn decay into two W bosons and two b-quarks. HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on theMUON TOMOGRAPHY
Muon Tomography. Every second of every day, we are bombarded with thousands of particles that pass through our bodies without us noticing. Many of these particles are muons, second-generation leptons that are produced by cosmic rays and reach Earth’s surface at aCMS GEMS SHINE ON!
This five-row, three-column detector stand has everything that’s needed to simulate the working conditions of the CMS GE1/1 chambers. With all of the same data, voltage, and cooling connections as in CMS, the QC8 stand allows the researchers to take cosmic muon data with up to 30 GEM chambers at a time. QC8 consists of a series of tests which UNEXPLAINED LONG-RANGE CORRELATIONS OBSERVED IN PPBSEE MORE ONCMS.CERN
LOW-ENERGY LEPTONS FOR HIGH-ENERGY PHYSICS High-energy muons may be the easiest-to-measure particles at CMS (the experiment is, after all, the Compact MUON Solenoid). However, measurements of low-energy leptons must contend with a highly-challenging source of backgrounds. Heavy hadrons, cousins of the proton and neutron, are produced copiously in LHC collisions andcan decay to muons
ARE THERE MORE PARTICLES LEFT TO FIND? Supersymmetry: Uniting the forces Towards a superforce. Our understanding of the workings of the Universe often progress when unexpected connections are found between what appeared at first to beseparate entities.
DO WE REALLY LIVE IN ONLY THREE DIMENSIONS?THE CMS DETECTOR
Illuminating! Counting LHC collisions with CMS. In the LHC, groups of 100 billion protons collide 25 million times every second. But most of these protons miss, so each time we point the protons at each other doesn't give us 100 million proton-proton collisions. In fact, collisions are much, much.CMS AWARDS 2020
Congratulations to CMS members who have received the CMS Award for 2020! As is the tradition, every year during the February CMS week, members of the CMS collaboration are presented with awards for their incredible contributions and dedication to the CMS experiment. HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on theMUON TOMOGRAPHY
Muon Tomography. Every second of every day, we are bombarded with thousands of particles that pass through our bodies without us noticing. Many of these particles are muons, second-generation leptons that are produced by cosmic rays and reach Earth’s surface at a CMS SCIENTIFIC RESULTS The complete list of publications is here. Preliminary results on collision data at 0.9, 2.36, 7, and 8 TeV are described in Physics Analysis Summaries; Monte Carlo studies can be found here. Public performance plots are shown in Detector Performance Summaries. For any questions, please contact the CMS Physics Coordinators, cms-physics WHAT DOES THE DECAY OF A BOTTOM QUARK LOOK LIKE? Figure 1: Interactive (try zooming/rotating!) event display of a 13 TeV proton-proton collision in the CMS detector during 2016. The figure shows the particles emerging from the production of a pair of top quarks, which in turn decay into two W bosons and two b-quarks.HOW TO JOIN CMS
Types of Membership. There are three ways in which institutes can participate in CMS. An institute with FULL MEMBERSHIP profits from being a member of a leading international scientific community, by taking part in technology development, data processing and computing, and physics analysis. For institutes wishing to join the collaboration, but whose resources initially preclude full membership USING MACHINE LEARNING TO IMPROVE THE DETECTION OF NEW Using machine learning to improve the detection of new physics in the interactions of the top quark Although our theory describing the interactions between fundamental particles is exceptionally successful, it has weaknesses. A SHOT IN THE DARK: CAN JETS RECOIL AGAINST DARK MATTER A shot in the dark: Can jets recoil against Dark Matter? In their 2020 hit single ‘A Shot in the Dark’ the rock band AC/DC got it right in many ways: “ A shot in the dark Make you feel alright A shot in the dark All through the whole night ”. The authors of this analysis have been feeling great, toiling away long nights in search for a shot in the dark, looking for a single, energeticCMS DETECTOR DESIGN
CMS Detector Design. Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentum of each one. CMS needed: a high performance system to detect and measure muons, a high resolution method to detect and measure electrons and photons (an electromagnetic calorimeter), a highDETECTING MUONS
A muon, in the plane perpendicular to the LHC beams, leaves a curved trajectory in four layers of muon detectors ("stations") . As the name “Compact Muon Solenoid” suggests, detecting muons is one of CMS’s most important tasks. Muons are charged particles that are just like electrons and positrons, but are 200 times heavier. LOW-ENERGY LEPTONS FOR HIGH-ENERGY PHYSICS High-energy muons may be the easiest-to-measure particles at CMS (the experiment is, after all, the Compact MUON Solenoid). However, measurements of low-energy leptons must contend with a highly-challenging source of backgrounds. Heavy hadrons, cousins of the proton and neutron, are produced copiously in LHC collisions andcan decay to muons
UNDER THE RADAR: SEARCHING FOR STEALTHY NEW PARTICLES The standard model of particle physics encapsulates our current knowledge of elementary particles and their interactions. The standard model is not complete; for example, it does not describe observations such as gravity, has no prediction for dark matter, which makes up most of the matter in the universe, or that neutrinos have mass. RESISTIVE PLATE CHAMBERS Resistive plate chambers (RPC) are fast gaseous detectors that provide a muon trigger system parallel with those of the DTs and CSCs. RPCs consist of two parallel plates, a positively-charged anode and a negatively-charged cathode, both made of a very high resistivity CMS SCIENTIFIC RESULTS The complete list of publications is here. Preliminary results on collision data at 0.9, 2.36, 7, and 8 TeV are described in Physics Analysis Summaries; Monte Carlo studies can be found here. Public performance plots are shown in Detector Performance Summaries. For any questions, please contact the CMS Physics Coordinators, cms-physicsON-SITE VISITS
167503. CMS is the only experiment where you can visit the underground facilities during the LHC running period. After a short introduction, groups are guided by a CMS engineer or physicist through the construction hall where the 15 sections of CMS were lowered 100 meters into the underground cavern, near Cessy, France. You will have theCOLLABORATION
Collaboration. The CMS Collaboration brings together members of the particle physics community from across the globe in a quest to advance humanity’s knowledge of the very basic laws of our Universe. CMS has over 4000 particle physicists, engineers, computer scientists, technicians and students from around 200 institutes and universitiesfrom
HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on the HUNTING LEPTOQUARKS WITH THE CMS EXPERIMENT The CMS experiment has an extensive program to investigate leptoquarks under different hypotheses, and if such a particle exists, it will be revealed in future studies! Figure 2 contains only the data that was collected in 2016 through 2018, and the LHC is expected to produce at least a factor 20 data more in its lifetime. With the future runsCMS DETECTOR DESIGN
CMS Detector Design. Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentum of each one. CMS needed: a high performance system to detect and measure muons, a high resolution method to detect and measure electrons and photons (an electromagnetic calorimeter), a highACHIEVEMENT AWARDS
Achievement Awards. Begun in 2007, the annual Achievement Awards honor individuals who have distinguished themselves by performing significant and lasting contributions to different components of the CMS experiment. On the right, you can find the names and IT`S NEVER TOO LATE FOR PHOTONS AT CMS! The photon arrived at the ECAL 1.91 nanoseconds after the proton-proton collision in the LHC occurred. Figure 3 shows how sensitive the CMS experiment is to delayed photons in terms of the mass of the neutralino and proper lifetime. The values of the masses and lifetimes to the left of the black curve in the figure are thoseexcluded by this
WHAT AND WHERE IS ANTIMATTER? The evidence spoke for itself. The ‘case file’ of antimatter was opened in 1928 by physicist Paul Dirac. He developed a theory that combined quantum mechanics and Einstein’s special relativity to provide a more complete description of electron interactions. The basic equation he derived turned out to have two solutions, one forthe
DO WE REALLY LIVE IN ONLY THREE DIMENSIONS? CMS SCIENTIFIC RESULTS The complete list of publications is here. Preliminary results on collision data at 0.9, 2.36, 7, and 8 TeV are described in Physics Analysis Summaries; Monte Carlo studies can be found here. Public performance plots are shown in Detector Performance Summaries. For any questions, please contact the CMS Physics Coordinators, cms-physicsON-SITE VISITS
167503. CMS is the only experiment where you can visit the underground facilities during the LHC running period. After a short introduction, groups are guided by a CMS engineer or physicist through the construction hall where the 15 sections of CMS were lowered 100 meters into the underground cavern, near Cessy, France. You will have theCOLLABORATION
Collaboration. The CMS Collaboration brings together members of the particle physics community from across the globe in a quest to advance humanity’s knowledge of the very basic laws of our Universe. CMS has over 4000 particle physicists, engineers, computer scientists, technicians and students from around 200 institutes and universitiesfrom
HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on the HUNTING LEPTOQUARKS WITH THE CMS EXPERIMENT The CMS experiment has an extensive program to investigate leptoquarks under different hypotheses, and if such a particle exists, it will be revealed in future studies! Figure 2 contains only the data that was collected in 2016 through 2018, and the LHC is expected to produce at least a factor 20 data more in its lifetime. With the future runsCMS DETECTOR DESIGN
CMS Detector Design. Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentum of each one. CMS needed: a high performance system to detect and measure muons, a high resolution method to detect and measure electrons and photons (an electromagnetic calorimeter), a highACHIEVEMENT AWARDS
Achievement Awards. Begun in 2007, the annual Achievement Awards honor individuals who have distinguished themselves by performing significant and lasting contributions to different components of the CMS experiment. On the right, you can find the names and IT`S NEVER TOO LATE FOR PHOTONS AT CMS! The photon arrived at the ECAL 1.91 nanoseconds after the proton-proton collision in the LHC occurred. Figure 3 shows how sensitive the CMS experiment is to delayed photons in terms of the mass of the neutralino and proper lifetime. The values of the masses and lifetimes to the left of the black curve in the figure are thoseexcluded by this
WHAT AND WHERE IS ANTIMATTER? The evidence spoke for itself. The ‘case file’ of antimatter was opened in 1928 by physicist Paul Dirac. He developed a theory that combined quantum mechanics and Einstein’s special relativity to provide a more complete description of electron interactions. The basic equation he derived turned out to have two solutions, one forthe
DO WE REALLY LIVE IN ONLY THREE DIMENSIONS?THE CMS DETECTOR
Illuminating! Counting LHC collisions with CMS. In the LHC, groups of 100 billion protons collide 25 million times every second. But most of these protons miss, so each time we point the protons at each other doesn't give us 100 million proton-proton collisions. In fact, collisions are much, much. NEWS | CMS EXPERIMENT The CMS experiment has a new leadership team. Starting from 1 September 2020 until August 2022, the new spokesperson Luca Malgeri and the two deputies Gautier Hamel de Monchenault and Jim Olsen will lead more than 5000 people for the CMS NEWS | CMS EXPERIMENT Hadron Calorimeter Next-Generation Clock Control Module Rework. Around the one-year anniversary of the first COVID-19 lockdown in Switzerland, physicists and engineers working on the Compact Muon Solenoid (CMS) experiment closed the case on an elusiveON-SITE VISITS
167503. CMS is the only experiment where you can visit the underground facilities during the LHC running period. After a short introduction, groups are guided by a CMS engineer or physicist through the construction hall where the 15 sections of CMS were lowered 100 meters into the underground cavern, near Cessy, France. You will have theCOLLABORATION
Collaboration. The CMS Collaboration brings together members of the particle physics community from across the globe in a quest to advance humanity’s knowledge of the very basic laws of our Universe. CMS has over 4000 particle physicists, engineers, computer scientists, technicians and students from around 200 institutes and universitiesfrom
USING MACHINE LEARNING TO IMPROVE THE DETECTION OF NEW Using machine learning to improve the detection of new physics in the interactions of the top quark Although our theory describing the interactions between fundamental particles is exceptionally successful, it has weaknesses. A SHOT IN THE DARK: CAN JETS RECOIL AGAINST DARK MATTER A shot in the dark: Can jets recoil against Dark Matter? In their 2020 hit single ‘A Shot in the Dark’ the rock band AC/DC got it right in many ways: “ A shot in the dark Make you feel alright A shot in the dark All through the whole night ”. The authors of this analysis have been feeling great, toiling away long nights in search for a shot in the dark, looking for a single, energeticCMS GEMS SHINE ON!
This five-row, three-column detector stand has everything that’s needed to simulate the working conditions of the CMS GE1/1 chambers. With all of the same data, voltage, and cooling connections as in CMS, the QC8 stand allows the researchers to take cosmic muon data with up to 30 GEM chambers at a time. QC8 consists of a series of tests which HOW DID MATTER FORM? The Universe has changed a great deal in the 13.7 billion years since the Big Bang, but the basic building blocks of everything from microbes to galaxies were signed, sealed and delivered in the first few millionths of a second. This is when the fundamental quarks became locked up within the protons and neutrons that form atomic nuclei. RESISTIVE PLATE CHAMBERS Resistive plate chambers (RPC) are fast gaseous detectors that provide a muon trigger system parallel with those of the DTs and CSCs. RPCs consist of two parallel plates, a positively-charged anode and a negatively-charged cathode, both made of a very high resistivity CMS SCIENTIFIC RESULTS The complete list of publications is here. Preliminary results on collision data at 0.9, 2.36, 7, and 8 TeV are described in Physics Analysis Summaries; Monte Carlo studies can be found here. Public performance plots are shown in Detector Performance Summaries. For any questions, please contact the CMS Physics Coordinators, cms-physicsON-SITE VISITS
167503. CMS is the only experiment where you can visit the underground facilities during the LHC running period. After a short introduction, groups are guided by a CMS engineer or physicist through the construction hall where the 15 sections of CMS were lowered 100 meters into the underground cavern, near Cessy, France. You will have the HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on theCOLLABORATION
Collaboration. The CMS Collaboration brings together members of the particle physics community from across the globe in a quest to advance humanity’s knowledge of the very basic laws of our Universe. CMS has over 4000 particle physicists, engineers, computer scientists, technicians and students from around 200 institutes and universitiesfrom
HUNTING LEPTOQUARKS WITH THE CMS EXPERIMENT The CMS experiment has an extensive program to investigate leptoquarks under different hypotheses, and if such a particle exists, it will be revealed in future studies! Figure 2 contains only the data that was collected in 2016 through 2018, and the LHC is expected to produce at least a factor 20 data more in its lifetime. With the future runsCMS DETECTOR DESIGN
CMS Detector Design. Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentum of each one. CMS needed: a high performance system to detect and measure muons, a high resolution method to detect and measure electrons and photons (an electromagnetic calorimeter), a highACHIEVEMENT AWARDS
Achievement Awards. Begun in 2007, the annual Achievement Awards honor individuals who have distinguished themselves by performing significant and lasting contributions to different components of the CMS experiment. On the right, you can find the names and IT`S NEVER TOO LATE FOR PHOTONS AT CMS! The photon arrived at the ECAL 1.91 nanoseconds after the proton-proton collision in the LHC occurred. Figure 3 shows how sensitive the CMS experiment is to delayed photons in terms of the mass of the neutralino and proper lifetime. The values of the masses and lifetimes to the left of the black curve in the figure are thoseexcluded by this
WHAT AND WHERE IS ANTIMATTER? The evidence spoke for itself. The ‘case file’ of antimatter was opened in 1928 by physicist Paul Dirac. He developed a theory that combined quantum mechanics and Einstein’s special relativity to provide a more complete description of electron interactions. The basic equation he derived turned out to have two solutions, one forthe
DO WE REALLY LIVE IN ONLY THREE DIMENSIONS? CMS SCIENTIFIC RESULTS The complete list of publications is here. Preliminary results on collision data at 0.9, 2.36, 7, and 8 TeV are described in Physics Analysis Summaries; Monte Carlo studies can be found here. Public performance plots are shown in Detector Performance Summaries. For any questions, please contact the CMS Physics Coordinators, cms-physicsON-SITE VISITS
167503. CMS is the only experiment where you can visit the underground facilities during the LHC running period. After a short introduction, groups are guided by a CMS engineer or physicist through the construction hall where the 15 sections of CMS were lowered 100 meters into the underground cavern, near Cessy, France. You will have the HOW MANY HIGGS BOSONS ARE THERE? Tau leptons decay into isolated electrons, muons or a small number of pions which can all be easily detected by the CMS detector. Combining the two is, therefore, a great way to search for events with two Higgs bosons. A challenge of the analysis is that two unknown bosons are involved, and the signature that is searched for depends on theCOLLABORATION
Collaboration. The CMS Collaboration brings together members of the particle physics community from across the globe in a quest to advance humanity’s knowledge of the very basic laws of our Universe. CMS has over 4000 particle physicists, engineers, computer scientists, technicians and students from around 200 institutes and universitiesfrom
HUNTING LEPTOQUARKS WITH THE CMS EXPERIMENT The CMS experiment has an extensive program to investigate leptoquarks under different hypotheses, and if such a particle exists, it will be revealed in future studies! Figure 2 contains only the data that was collected in 2016 through 2018, and the LHC is expected to produce at least a factor 20 data more in its lifetime. With the future runsCMS DETECTOR DESIGN
CMS Detector Design. Detectors consist of layers of material that exploit the different properties of particles to catch and measure the energy and momentum of each one. CMS needed: a high performance system to detect and measure muons, a high resolution method to detect and measure electrons and photons (an electromagnetic calorimeter), a highACHIEVEMENT AWARDS
Achievement Awards. Begun in 2007, the annual Achievement Awards honor individuals who have distinguished themselves by performing significant and lasting contributions to different components of the CMS experiment. On the right, you can find the names and IT`S NEVER TOO LATE FOR PHOTONS AT CMS! The photon arrived at the ECAL 1.91 nanoseconds after the proton-proton collision in the LHC occurred. Figure 3 shows how sensitive the CMS experiment is to delayed photons in terms of the mass of the neutralino and proper lifetime. The values of the masses and lifetimes to the left of the black curve in the figure are thoseexcluded by this
WHAT AND WHERE IS ANTIMATTER? The evidence spoke for itself. The ‘case file’ of antimatter was opened in 1928 by physicist Paul Dirac. He developed a theory that combined quantum mechanics and Einstein’s special relativity to provide a more complete description of electron interactions. The basic equation he derived turned out to have two solutions, one forthe
DO WE REALLY LIVE IN ONLY THREE DIMENSIONS?THE CMS DETECTOR
Illuminating! Counting LHC collisions with CMS. In the LHC, groups of 100 billion protons collide 25 million times every second. But most of these protons miss, so each time we point the protons at each other doesn't give us 100 million proton-proton collisions. In fact, collisions are much, much. NEWS | CMS EXPERIMENT The CMS experiment has a new leadership team. Starting from 1 September 2020 until August 2022, the new spokesperson Luca Malgeri and the two deputies Gautier Hamel de Monchenault and Jim Olsen will lead more than 5000 people for the CMS NEWS | CMS EXPERIMENT Hadron Calorimeter Next-Generation Clock Control Module Rework. Around the one-year anniversary of the first COVID-19 lockdown in Switzerland, physicists and engineers working on the Compact Muon Solenoid (CMS) experiment closed the case on an elusiveON-SITE VISITS
167503. CMS is the only experiment where you can visit the underground facilities during the LHC running period. After a short introduction, groups are guided by a CMS engineer or physicist through the construction hall where the 15 sections of CMS were lowered 100 meters into the underground cavern, near Cessy, France. You will have theCOLLABORATION
Collaboration. The CMS Collaboration brings together members of the particle physics community from across the globe in a quest to advance humanity’s knowledge of the very basic laws of our Universe. CMS has over 4000 particle physicists, engineers, computer scientists, technicians and students from around 200 institutes and universitiesfrom
USING MACHINE LEARNING TO IMPROVE THE DETECTION OF NEW Using machine learning to improve the detection of new physics in the interactions of the top quark Although our theory describing the interactions between fundamental particles is exceptionally successful, it has weaknesses. A SHOT IN THE DARK: CAN JETS RECOIL AGAINST DARK MATTER A shot in the dark: Can jets recoil against Dark Matter? In their 2020 hit single ‘A Shot in the Dark’ the rock band AC/DC got it right in many ways: “ A shot in the dark Make you feel alright A shot in the dark All through the whole night ”. The authors of this analysis have been feeling great, toiling away long nights in search for a shot in the dark, looking for a single, energeticCMS GEMS SHINE ON!
This five-row, three-column detector stand has everything that’s needed to simulate the working conditions of the CMS GE1/1 chambers. With all of the same data, voltage, and cooling connections as in CMS, the QC8 stand allows the researchers to take cosmic muon data with up to 30 GEM chambers at a time. QC8 consists of a series of tests which HOW DID MATTER FORM? The Universe has changed a great deal in the 13.7 billion years since the Big Bang, but the basic building blocks of everything from microbes to galaxies were signed, sealed and delivered in the first few millionths of a second. This is when the fundamental quarks became locked up within the protons and neutrons that form atomic nuclei. RESISTIVE PLATE CHAMBERS Resistive plate chambers (RPC) are fast gaseous detectors that provide a muon trigger system parallel with those of the DTs and CSCs. RPCs consist of two parallel plates, a positively-charged anode and a negatively-charged cathode, both made of a very high resistivity Loading... Skip to main content CERN ACCELERATING SCIENCE*
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CMS SEES EVIDENCE FOR THE HIGGS BOSON DECAYING INTO MUONSSee More
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Congratulations to Geoffrey Hall on achieving the James Chadwick Medaland Prize
__ 05 Nov 2020 | __ Collaboration Professor Geoffrey Hall from Imperial London College has won the James Chadwick Medal and Prize. This award is granted by the Institute of Physics (IoP) for distinguished contributions in particle physics. Geoffrey has devoted much of his career to…READ MORE
Forward-looking with half a Higgs __ 27 Oct 2020 | __ Physics Eight years ago in 2012, at the largest International Conference on High Energy Physics, the discovery of a new particle carefully coined as Higgs boson-like was announced by the ATLAS and CMS Collaborations. They had seen an excess in data over what…READ MORE
Shielding the outer muon barrel chambers of CMS for HL-LHC : preparing an umbrella before the rain __ 19 Oct 2020 | __ Collaboration CMS has just finished wrapping the barrel with a new layer which is not a new detector but a brand new protection system aimed to keep the outer barrel muon chambers shielded from background radiation present in the experimental cavern during collisi…READ MORE
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