The ATLAS collaboration finds evidence of Higgs-boson decays to muons and improves sensitivity to Higgs-boson decays to a Z boson and a photon.

The ATLAS collaboration celebrated the dedication, ingenuity and collaborative spirit of its members at the 8th Outstanding Achievement Awards

The CMS and ATLAS experiments at CERN’s Large Hadron Collider have observed an unforeseen feature in the behaviour of top quarks that suggests that these heaviest of all elementary particles form a fleeting union

The LHC has restarted and both beams have been circulating in the machine since 8 April, meaning that the start of the LHC beam commissioning during Easter is apparently not a constant of nature

The Breakthrough Prize in Fundamental Physics was awarded to the ALICE, ATLAS, CMS and LHCb collaborations during a ceremony held in Los Angeles on 5 April

The first beam-based physics of 2025 has started and more will follow soon. However, some unexpected challenges will cause a small delay in the restart of the LHC

Spokesperson Stéphane Willocq and Deputy Spokespersons Anna Sfyrla and Guillaume Unal will lead the collaboration for the next two years

Every year, these awards celebrate the outstanding achievements made by PhD students working with the collaboration

ATLAS reports the first observation of a Z boson accompanied by two other carriers of the weak force

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

The result opens a new window into the study of the quark–gluon plasma that is believed to have filled the Universe briefly after the Big Bang

For the next 17 days, every minute counts when it comes to taking lead–lead collision data