The TBPS Rings are in production, offering an innovative design to incline sensors toward the LHC beam and maximise coverage. They are the first support structures in production for the new Tracker!
As part of the CMS Hi-Lumi Tracker, construction…
News
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Detector
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Detector
The first of the improved Resistive Plate Chambers for Hi-Lumi CMS were installed in record time during the LHC winter break.
The RPC Hi-Lumi CMS Project reached an important milestone at the start of 2025 by delivering the first half of its final…
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Physics
The Higgs boson is deeply connected to the mechanism that generates the masses of elementary particles. In the Standard Model (SM), which describes the properties of all elementary particles and the interactions among them, the Higgs boson…
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Detector
CERN and CMS engineers and technicians have installed the first two of nine required next-generation carbon dioxide (CO2) cooling plants in the underground Service Cavern of the CMS experiment in Cessy, France, as well as two of the accumulators.…
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Collaboration
2024 was an impressive year: the most data ever collected by CMS, many important results including two landmark results (W boson mass and top entanglement), milestone for the upcoming Hi-Lumi CMS detector reached, and ever more innovations pushing…
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Engage with CMS
Art & Science Co-Lab at Art Genève 2025: A Meeting Point for Creativity and Innovation
The Art & Science Co-Lab invites guests, participants, and volunteers to engage in this collaborative initiative and explore new perspectives at the…
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Physics
CMS scientists discover some of the rarest collisions that the LHC can produce – such as the scattering of light by light – and learn more about the quantum nature of electromagnetism, search for new particles, and much more.
In everyday life…
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Collaboration
Welcome to our look back at 2024 - and what a year it has been!
After last winter’s planned technical stop of the LHC, everything started back up again so that CMS could continue collecting data for the LHC’s Run 3. We published a piece about how we…
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Detector
The heavy ion Run has just concluded, marking the start of the extended year-end technical stop (EYETS). Reflecting on 2024, this year’s LHC Run exceeded expectations, delivering the highest accumulated data volume to date. In alignment with this…
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Collaboration
The CMS Collaboration announced the 2024 Young Researcher Prize winners during the opening plenary of December’s CMS Week: Silvio Donato, Kenneth Long, and Stella Orfanelli.
This annual award recognizes the exceptional contributions of young…
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Physics
In a recent result, the CMS experiment has combined a comprehensive set of searches for the production of not one but two Higgs bosons – the result is a significant step towards observation of this elusive process, and constitutes a legacy of…
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Physics
In a first measurement of its kind at the LHC, the CMS experiment tests whether top quarks adhere to Einstein’s special theory of relativity, and improves the bounds on noncompliance by up to a factor of one hundred with respect to previous…