How long do fundamental particles live? In the Standard Model, we know particles can have many different lifetimes; from the top quark which decays in less than a millionth of a billionth of a billionth of a second, to stable particles like the…
In November 2018 the proton-proton running of the LHC Run 2 ended. The data collected in 2018 is the largest sample ever collected at the LHC. Just under three months after the final proton proton collisions were recorded, the CMS collaboration…
The top quark is the heaviest particle in the standard model, and since its discovery in 1995 at the Tevatron collider at Fermilab, its study has become prominent in furthering our understanding of fundamental physics. At the Large Hadron Collider,…
CMS sets the world’s most stringent limits on B⁰ and B⁰ₛ decays into four muons.
After examining the Run 3 dataset collected between 2022 and 2024, the CMS experiment has established the most stringent limits to date on the extremely rare decays of…
CMS pushes the sensitivity frontier towards a measurement of the rare Higgs boson decay into a Z boson and a photon
The 2012 discovery of the Higgs boson at CERN by CMS and ATLAS was a landmark achievement in the world of particle physics - but it…
CMS sees evidence of the Upsilon meson decaying into two tau leptons for the first time at a hadron collider
Beyond our best current understanding of particle physics, encapsulated in the standard model, various theoretical models predict the…