ATLAS
ATLAS further investigates the width of top quark
The top quark is the heaviest known elementary particle and completes the quark sector of the standard model (SM). Like other fermions in the standard model (SM), it decays through the electroweak interaction. But unlike b and c quarks, which form…
Read moreSearching for leptoquarks at the LHC
Last month, Admir Greljo (University of Mainz) and Abdollah Mohammad (Kansas State University, US) during the Collider Cross Talk, gave a comprehensive overview of the theoretical and experimental aspects in leptoquarks searches. Leptoquarks are…
Read moreATLAS observes Higgs boson produced in association with top quarks
The ATLAS collaboration presented the first evidence of “ttH production”, a rare process where a pair of top quarks emits a Higgs boson. Observing this process would provide new insight into the Higgs mechanism and allow for new studies of how…
Read moreA Moriond Retrospective: New Results from the LHC Experiments
Every March, particle physicists around the world take two weeks to promote results, share opinions and do a bit of skiing in-between. This is the Moriond tradition and the 52nd iteration of the conference took place this year in La Thuile, Italy.…
Read moreNew measurement of the W boson mass by the ATLAS collaboration
The W electroweak gauge boson was discovered in 1983 at the CERN SPS collider. Although the properties of the W boson have been studied for more than 30 years, precise measurement of its mass remains a major challenge. Figure: The ATLAS…
Read moreATLAS and ALICE PhD Awards
Two of the LHC experiments, ATLAS and ALICE, recently announced winners of the “ATLAS PhD Grant” and “ALICE Thesis Award” schemes. The prizes aim to foster healthy competition between young members of the two collaborators and acknowledge the hard…
Read moreChronicles of the ATLAS data taking in 2015
2015 has been extraordinary: after 2 years of shutdown (LS-1) the LHC and its experiments have come back into operation for a new exciting running period (Run-2) to push the research about the infinitely small structure of matter, related…
Read moreResults from ATLAS & CMS shed light on Higgs properties
Three years after the announcement of the discovery of a new particle, the Higgs boson, the ATLAS and CMS Collaborations have recently presented for the first time combined measurements of many of its properties, at the third annual Large Hadron…
Read moreATLAS results from lead-lead and proton-lead collision
The ATLAS results from PbPb data included a measurement of high-pΤ photons and W mesons, high-precision measurement of jet and charged particle RΑΑ, studies of jet fragmentation, path length dependence of jet quenching, neighbouring jet…
Read moreLHC experiments back in business at record energy
The Large Hadron Collider (LHC) started delivering physics data on 3rd of June for the first time in 27 months. After an almost two year shutdown and several months re-commissioning, the LHC is now providing collisions to all of its…
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