The Compact Muon Solenoid (CMS) Muon System is undergoing major upgrades during Long Shutdown 2 (LS2), preparing for the High Luminosity LHC (HL-LHC). The Large Hadron Collider will be upgraded to significantly increase the luminosity (frequency of…

In 2012 the CMS and ATLAS Collaborations announced the discovery of a new particle, that seems mostly consistent with the Higgs boson as predicted by the Standard Model. To understand if that is actually the case, physicists in the CMS…

On Friday 19 June 2020, scientists at the CMS experiment at CERN's Large Hadron Collider submitted their 1,000th paper. This monumental achievement reflects an outstanding contribution to humanity's understanding of the universe — and it's just the…

The CMS collaboration has released the first observation of the simultaneous production of three W or Z bosons in proton-proton collisions at the Large Hadron Collider (LHC). The result is based on the data collected by CMS during 2016–2018 at a…

June is the month of the PhD Thesis Award at CMS, the prize that aims to recognise the best PhD Thesis of the year based on impact, original contribution and clarity. 25 CMS theses were nominated to compete for the CMS PhD Thesis Award for 2019.…

The CMS magnet, one of the largest superconducting magnets in the world, with the largest stored energy, has been warmed up in April-May 2020 in order to perform an intervention on the vacuum pumping system. The magnet is a 220-ton cylinder cooled…

The eighth annual conference on Large Hadron Collider Physics (LHCP2020) is one of the important conferences for physics at the LHC. Originally planned to take place in Paris, LHCP is operating as a fully virtual conference this year.  The CMS…

Have you ever pondered what happened to our Universe after the Big Bang? When the Universe was created, each particle was produced together with its antiparticle. For example, for each electron we see now, there was a positron created. But, some 13…

In Frozen, Anna and Elsa discover magical powers that open up a whole new world of possibilities. In Frozen 2, they go far Into the Unknown to understand the source of the magic that binds them all together. The CMS experiment is doing the…

The COVID-19 pandemic is having widespread impacts close to home and around the world. COVID-19 will certainly change the way the CMS collaboration will function as an experiment. Vast portions our research depend on global interactions to be…

Immediately after CMS was brought into a safe state on 18 March, planning for a controlled restart began, with the objective of protecting all people working at the CMS Experiment site (Point 5, P5) as effectively as reasonably possible. Physical…

During the early months of 2020, as the COVID-19 threat increased, CMS activity was adapted to gradually transfer responsibility to locally resident collaborators. LS2 work was accelerated in the experimental hall, so as to reach a critical LS2…