News

26 Sep 2019 | barneyd | Detector
The high-granularity calorimeter (HGCAL) is a major upgrade of CMS, and is necessary to maintain excellent calorimetric performance in the endcaps during HL-LHC operations. HGCAL is one of the most ambitious detector projects undertaken, due to the…
26 Sep 2019 | fblekman | Physics
For the first time, CMS physicists have measured the production rate of top quark pairs as a function of three experimental observables simultaneously. The new result helps to answer several fundamental questions, among which, the properties of…
24 Sep 2019 | lapka | Collaboration
Congratulations to five CMS scientists, Tulika Bose, Yuri Gershtein, Andrei Gritsan, George Wei-Shu Hou and Markus Klute, who were elected as American Physical Society (APS) Fellows in 2019 for their exceptional contributions to the field of physics…
21 Sep 2019 | fblekman | Physics
For the first time, CMS physicists have investigated an effect called the “running” of the top quark mass, a fundamental quantum effect predicted by the Standard Model. Mass is one of the most complex concepts in fundamental physics, which went…
11 Sep 2019 | fblekman | Physics
When the CMS experiment records particle collision events, a large number of unwanted extra collisions overlap in the detector and hide the rare particle collision that is worthwhile studying. CMS physicists have developed a new method that gives…
10 Sep 2019 | fblekman | Physics
New algorithms from the Compact Muon Solenoid experiment use the ideas used in mobile phone facial recognition to better understand the collisions at the Large Hadron Collider. One of the most exciting challenges at the Large Hadron Collider is the…
29 Aug 2019 | acolaleo | Article
As part of the LHC Long Shutdown 2 (LS2) activities at CMS, the CMS Muon Cathode Strip Chamber (CSC) subsystem is having its electronics upgraded in the chambers closest to the beam line. This is done in anticipation of challenges it will face when…
05 Aug 2019 | fblekman | Physics
The Bs  meson is a bound state of a strange quark and a beauty antiquark – as such it possesses both beauty and strangeness! For many years, searches for an extremely rare decay of the Bs meson, to a μ+μ-  pair, remained a holy grail of particle…
26 Jul 2019 | estarlin | Detector
The CMS Gas Electron Multiplier (GEM) subsystem will form an extra layer of detectors, along with the Cathode Strip Chambers (CSC) layers, closest to the beam. The GEM's ability to cope with a very high particle rate will greatly improve muon…
22 Jul 2019 | fbaldass | Article
Every year the CMS Thesis Award Committee recognizes and rewards excellence in the CMS PhD student research. As highlighted by Andrea Giammanco, the Award Committee Chair,  “The quality of theses submitted for this award is increasing year after…
18 Jul 2019 | mccauley | Collaboration
The CMS collaboration at CERN is happy to announce the release of its fourth batch of open data to the public. With this release, which brings the volume of its open data to more than 2 PB (or two million GB), CMS has now provided open access to 100…
17 Jul 2019 | fblekman | Physics
The CMS collaboration has carried out for the first time a direct search for a Higgs boson decaying into charm quarks, a vital step in understanding the Higgs particle and the Standard Model. The discovery of a Higgs boson by both the ATLAS and CMS…