Access to Collaboration Site and Physics Results
All together now: adding more pieces to the Higgs boson puzzle
– The Higgs boson was discovered in 2012 by the ATLAS and CMS experiments, but its rich interaction properties (its coupling to other particles) have remained a puzzle. Thanks to an unprecedented amount of Higgs bosons produced at the LHC, all of the main Higgs boson production and decay modes have now been observed.Read more →
ATLAS measures Higgs boson coupling to top quark in diphoton channel with full Run 2 dataset
– At the Rencontres de Moriond (La Thuile, Italy), the ATLAS Collaboration presented an updated measurement of ttH production in the diphoton channel. The result examines the full Run 2 dataset – 139 fb-1 collected between 2015 and 2018 – to observe ttH production in a single channel with a significance of 4.9 standard deviations.Read more →
ATLAS finds evidence of three massive vector boson production
– Today, at the Rencontres de Moriond conference (La Thuile, Italy), the ATLAS collaboration released evidence for the simultaneous production of three W or Z bosons in proton–proton collisions at the Large Hadron Collider (LHC). The W and Z bosons are the mediator particles of the weak force – one of the four known fundamental forces – which is responsible for the phenomenon of radioactivity as well as an essential ingredient to our Sun's thermonuclear process.Read more →
ATLAS observes light scattering off light
– Light-by-light scattering is a very rare phenomenon in which two photons – particles of light – interact, producing again a pair of photons. The ATLAS Collaboration has reported the observation of light-by-light scattering with a significance beyond 8 standard deviations.Read more →
Searching for Dark Matter with the ATLAS detector
– When we look around us, at all the things we can touch and see – all of this is visible matter. And yet, this makes up less than 5% of the universe.Read more →
First ATLAS result with full Run 2 dataset: a search for new heavy particles
– Could a Grand Unified Theory resolve the remaining mysteries of the Standard Model? If verified, it would provide an elegant description of the unification of SM forces at very high energies, and might even explain the existence of dark matter and neutrino masses. ATLAS physicists are searching for evidence of new heavy particles predicted by such theories, including a neutral Z’ gauge boson.Read more →
ATLAS honours six new Thesis Award winners
– On Valentine’s Day 2019, the ATLAS Collaboration took a break from the usual rhythm of scientific discussion to showcase some of its most junior members. In a celebration in CERN’s Main Auditorium, the collaboration held its 10th annual ATLAS Thesis Awards.Read more →
Preparing ATLAS for the future
– Long Shutdown 2 (LS2) of the Large Hadron Collider commenced last week, as the accelerator powered down and the entry to the ATLAS cavern opened wide. Over the next two years, teams from across the ATLAS Collaboration will be upgrading and consolidating their experiment. On the agenda: the refurbishments of key electronics, the maintenance of various detector components and – critically – the installation of new detectors.Read more →
ATLAS completes data-taking for Run 2
– Beams in the Large Hadron Collider came to a stop today, closing out four years of record-breaking operation for the ATLAS experiment. Run 2 saw the extraordinary exploration of the high-energy frontier, as the ATLAS experiment brought new understanding of particle physics.Read more →
In conversation with Martine Bosman, a pioneer of ATLAS hadronic calorimetry
– A long-standing member of the ATLAS Collaboration, Martine Bosman is one of the pioneers behind the Tile Calorimeter. Over her long career with the Collaboration, she has held several key roles: from convener of the Radiation Task Force and the Top Quark Group to Collaboration Board Chair. In this profile piece, Martine shares experiences and reflects on how the ATLAS Collaboration has grown and changed.Read more →
