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This di-jet event produced from proton-proton collisions was detected in the CMS detector. The green bars represent the energy deposited in the electromagnetic calorimeter and the blue ones represent the energy in the hadron calorimeter. The total energy is approximately 30 GeV in each jet. Click on image for high-resolution version. (Image: Tom McCauley / Tai Sakuma)
LHC delivers low-energy collisions to CMS and other experiments
| Anonymous | Detector
At about half past nine CET this morning, for the first time since the Large Hadron Collider (LHC) started up after two years of maintenance and repairs, the accelerator delivered proton-proton collisions to the LHC experiments ALICE, ATLAS, CMS and…
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Before proton collisions take place again at the LHC, the CMS detector has been looking at the result of collisions of cosmic particles high up in the atmosphere. This event display shows the track of a muon that reached the CMS detector 100 m underground and passed through the muon chambers (in red) and the silicon tracker (in yellow). Muons as this one are used to calibrate the detector in advance of proton collisions.
CMS is never idle
| adavid | Collaboration
CMS is eager to see the first collisions of the LHC Run2. The recent news that the LHC restart may be delayed because of a hardware issue gives us extra time to prepare for those collisions. Far from being idle waiting for collisions, CMS is busy…
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The CMS Young Researcher's Prize medal, made out of a piece of the CMS magnet's conductor
CMS recognizes achievements of young collaborators
| virdee | Collaboration
Every year, the CMS Young Researcher’s Prize is awarded to CMS members who are less than around eight years into their careers after the completion of their PhD or an equivalent qualification. The Prize recognizes their outstanding achievements and…
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High-school students analysing CMS open data as part of the Physics Masterclasses. Photo credit: Marzena Lapka
CMS releases first batch of high-level LHC open data
| achintya | Engage with CMS
The Compact Muon Solenoid (CMS) Collaboration at CERN is excited to announce the public release of the first batch of high-level, analysable and open data from the Large Hadron Collider (LHC), recorded by the CMS detector. The datasets are available…
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Quartic gauge coupling: A Feynman diagram showing how protons radiate photons that then interact and produce W bosons.
The LHC as a photon collider
| achintya | Collaboration
Yes, that’s correct: photon collider. The Large Hadron Collider is known for smashing together protons. The energy from these collisions gets converted into matter, producing new particles that allow us to explore the nature of our Universe. The…
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Participants and organisers at Point 5.
Induction course for newcomers in CMS
| barneyd | Collaboration
On 17th and 18th July CMS held its first "Induction Course for Newcomers". Stemming from an idea discussed by the CMS Management earlier in the year, the idea was to give newcomers an overview of the detector - including its history, operation and…
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Marco Peruzzi holding his diploma. © Swiss Physical Society
CHIPP Prize 2014 to Marco Peruzzi
| sphicas | Collaboration
Marco Peruzzi (Institute for Particle Physics, ETH Zurich) has been awarded the CHIPP Prize 2014 for the best PhD student in experimental or theoretical particle physics in Switzerland by the Swiss Institute of Particle Physics, "for his original…
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Figure 1 (left) Exclusion limits for production of Higgsino production as a function of Higgsino mass and branching fraction. (right) Most sensitive search channel as a function of Higgsino mass and branching fraction
Recent results in the search for supersymmetry
| sphicas | Physics
Among the leading candidates to describe physics beyond the standard model of particle physics is Supersymmetry, a new symmetry that posits the existence of a partner particle for each known particle in the standard model. Supersymmetry, or “SUSY”…
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CMS Internal Newsletter, July 4, 2014
| sphicas | Collaboration
CMS news since the last newsletter of June 13: CMS closes major chapter of Higgs measurements Queen Elizabeth II bestows Knighthood on CMS Physicist 2013 CMS PhD Thesis Awards presented during June CMS week ECAL week, June 2014 pakistan@cms.cern.ch…
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Claudia Wulz, Giovanni Petrucciani, Lorenzo Bianchini, Tiziano Camporesi. Joern Lange could not attend the Awards presentation in person.
2013 CMS PhD Thesis Awards presented during June CMS week
| sphicas | Collaboration
The year 2013 was a special year for the CMS PhD Thesis Award programme as Awards were presented to the authors of three outstanding PhD theses. In the wrap-up session of the CMS week on June 27, Awards were presented to Drs. Lorenzo Bianchini,…
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Figure 1: Left - predicted ratio between the energy deposited in the ES and that in the EE for electrons from Z decays. The higher the ratio, the more upstream material. Centre - a photo of the Tracker bulkhead, showing cables/connectors etc. Right - the ratio derived from data, showing fine detail of the real situation
ECAL week, June 2014
| sphicas | Collaboration
Between 17th and 19th June, the picturesque and historic Italian city of Trieste played host to a gathering of about 40 members of the CMS ECAL Group for the first "ECAL Days" outside of CERN since the LHC startup. LS1 is a pivotal period for ECAL,…
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Figure 1: Combined diphoton mass spectrum illustrating the significance of the observed excess, where events are weighted by the expected signal-to-background ratio. The corresponding background-subtracted distribution is shown in the lower panel.
CMS closes major chapter of Higgs measurements
| campore | Physics
The data reveal that the particle discovered at CERN continues to behave just like the Standard Model predicts Since the discovery of a Higgs boson by the CMS and ATLAS Collaborations in 2012, physicists at the LHC have been making intense efforts…
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