Tag: Run 3
-
Light mesons with a heavy impact
The CMS experiment reports the first observation of the rare decay of an eta meson to two muons and two electrons.
-
Pushing the limits: rare four-muon decays of B mesons
CMS sets the world’s most stringent limits on B⁰ and B⁰ₛ decays into four muons.
-
Out of the loop: CMS advances in the search for a rare Higgs boson decay
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 was only the beginning.
-
From discovery to deep dive: The Higgs boson under the microscope
The CMS experiment uses data collected between 2022 and 2024 to perform a detailed study of Higgs boson production rates as a function of several variables.
-
Does the Higgs look a little odd lately?
The CMS experiment has performed a new search for Charge-Parity violation in Higgs boson decays to tau leptons, shedding light on the origin of matter.
-
The tangled dance of Higgs boson decays
For the first time, the CMS experiment probes quantum entanglement in Higgs boson decays to a pair of Z bosons.
-
Unlocking the vault of new physics
In Run 3, CMS expanded its trigger program to enhance capturing long-lived particles that decay far away from the point of collision – broadening the search for physics beyond the Standard Model.
-
Double the doublet, shake well, break one, and keep the other intact: welcome, dark scalars!
For the first time ever, the CMS experiment has designed a dedicated analysis using parametrised machine learning to look for new dark particles that don’t socialize with Standard Model fermions, one of them being a favourite candidate in the search for dark matter.
-
First measurements of vector boson scattering at 13.6 TeV
The CMS Collaboration reports the first measurements of the production of same-sign WW and WZ boson pairs in association with two jets at 13.6 TeV, using data collected during 2022–2024. One of the most powerful probes of the Higgs mechanism and the electroweak force is a rare process known as vector boson scattering (VBS).
-
Examining the fringes of gluon densities in highly energetic nuclei
The CMS Collaboration reports the first measurement of coherent ϕ meson photoproduction, establishing a powerful new tool to explore the dense nuclear matter in the transition regime from perturbative to nonperturbative QCD.