The year 2020 is coming to an end; despite its exceptional difficulties and challenges caused by the world-wide COVID-19 pandemic, the CMS collaboration reached many important milestones during this period. This overview gives a brief glimpse…

The CMS experiment at CERN has released into the public domain its first batches of open data from heavy-ion collisions at the Large Hadron Collider. The two batches contain two datasets from 2010 and four from 2011, recorded during the LHC’s first…

After the Large Hadron Collider (LHC) was shut down in December 2018 following the successful completion of RUN 2 operation (2015-2018), CMS is undergoing an intensive upgrade and maintenance program during the current 3-years break (“Long Shutdown…

The CMS Collaboration has released a new search for leptoquarks, a hypothetical particle that would be the "missing link" between quarks and leptons. The result has been submitted to the journal Physics Letters B. All known visible matter that…

What if new particles modify the behaviour of existing particles, but by only a little bit? In a new result, CMS physicists search for new physics using a technique called Effective Field Theory to study the top quark in a "toy universe".…

On November 24th, the CMS collaboration at CERN's Large Hadron Collider announced the publication of the 1000th paper in a peer-review journal, a truly exceptional achievement for a single Experiment. A thousand published papers, more than 100 per…

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…

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…

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…

When visitors at CMS enter the cavern and see the detector in all its beauty, they often ask how it has been possible to fit everything together and to make it work as a singular instrument. When the detector is in an open configuration, typically…

A new result by the CMS collaboration accepted by the journal Physical Review Letters demonstrates for the first time that top quarks are produced in nucleus-nucleus collisions. At the same time, this also demonstrates the capability of the CMS…

It is the dream of all particle physicists to find a new particle or to reveal a new fundamental force. In 2012 this dream came true when the big CERN experiments ATLAS and CMS discovered the Higgs particle, predicted by theorists decades ago. Other…