New ATLAS measurement of the lifetime of the electrically neutral beauty meson is the most precise to date

Gian Giudice is Head of CERN’s Theoretical Physics department

In the Standard Model of particle physics, the odds of this decay occurring are less than one in 10 billion

The eagerly awaited result is the most precise measurement of the W mass made at the LHC so far, and is in line with the prediction from the Standard Model of particle physics

The ATLAS collaboration has released its first results from searches for new physics phenomena conducted with data from Run 3 of the LHC

With this measurement the LHC is again demonstrating its ability to provide very high-precision measurements and bringing new insights into an old mystery

The LHCb collaboration’s new measurements of matter–antimatter asymmetry in decays of beauty particles are the most precise yet of their kind

The ATLAS and CMS collaborations have joined forces to establish the first evidence of the rare decay of the Higgs boson into a Z boson and a photon

Simultaneous measurements of rare B-meson decays using the full LHC Run 1 and 2 data samples agree with the predictions of the Standard Model, superseding previous results that had indicated intriguing departures from the 50-year old theory

The decay width is linked to the particle’s lifetime and if found to deviate from its predicted value could indicate the presence of new physics

Physicists at the ATLAS experiment are on the hunt for new, long-lived particles to help explain several outstanding mysteries of our Universe