Tag: ATLAS
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ATLAS further investigates the width of top quark
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 long-lived hadrons, the top quark has
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Searching for leptoquarks at the LHC
Searching 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 hypothetical particles that can turn quarks into leptons and vice versa and they can be
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ATLAS observes Higgs boson produced in association with top quarks
ATLAS 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 unknown physics might (or
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Electroweak boson pairs offer new approach to searches for New Physics
Electroweak boson pairs offer new approach to searches for New Physics During the past decades, the Standard Model (SM) of particle physics that explains how the basic building blocks of matter interact is scrutinised by high energy physics experiments. Along with the remarkable success of the SM, there are compelling reasons to consider that at
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Colliding photons at the LHC!
Colliding photons at the LHC! The interaction of photons with matter such as Compton and Thompson scattering are well-known at higher photon energies. What about the scattering events between photons? In classical Maxwell theory photons do not interact. In contrast, in quantum theory they can interact via quantal fluctuations. During the early years of quantum
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New LHC results presented at EPS-HEP 2017
New LHC results presented at EPS-HEP 2017 Over 700 physicists coming from 50 countries met in Venice to discuss the newest results in their field at EPS 2017, one of the world’s most important conferences on particle physics. The conference was co-organized by the European Physical Society, the Istituto Nazionale di Fisica Nucleare (INFN) and
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RD53: a large scale demonstrator pixel chip for the phase 2 upgrades of ATLAS and CMS
RD53: a large scale demonstrator pixel chip for the phase 2 upgrades of ATLAS and CMS The RD53 collaboration presented the RD53A large scale pixel chip demonstrator in 65nm CMOS technology as a vital milestone to make viable pixel detectors for the ATLAS and CMS phase 2 upgrades. The RD53 collaboration has during the last
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007 reasons for physics beyond the Standard Model
007 reasons for physics beyond the Standard Model The 5th of July marks the fifth anniversary since the discovery of a Higgs boson at the LHC. Summarizing notes for a recent set of lectures at the Asia-Europe-Pacific School of High-Energy Physics, John Ellis reviews events leading to the discovery of the Higgs boson and what
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A Moriond Retrospective: New Results from the LHC Experiments
A 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. Each of the four
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Wealth of new results in Quark Matter 2017
Wealth of new results in Quark Matter 2017 BROKEN IMAGE NOT MOVED (drupal url : https://ep-news.web.cern.ch//content/wealth-new-results-quark-matter-2017) Last month, the LHC experiment collaborations presented their latest results at the Quark Matter 2017 conference on how matter behaved in the very early moments of the universe. The programme includes a plethora of presentations on a variety of
