Two among the rarest processes probed so far at the Large Hadron Collider, the scattering between W and Z bosons emitted by quarks in proton-proton collisions, have been established by the ATLAS experiment at CERN.
General Physics
Jul 9, 2018
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146
The top quark, the heaviest known fundamental particle, plays a unique role in high-energy physics. Studies of its properties have opened new opportunities for furthering our knowledge of the Standard Model. In a new paper ...
General Physics
Feb 1, 2018
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46
Collisions of lead nuclei in the LHC form the hot, dense medium known as the quark-gluon plasma (QGP). Experimentally, the QGP is characterised by the collective flow of emerging quarks and gluons. They fragment into highly ...
General Physics
Oct 25, 2017
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26
Top quarks in the Large Hadron Collider (LHC) proton-proton collisions are predominantly produced in pairs, with one top quark and one top antiquark. In order to measure the production rates of top quark pairs, the ATLAS ...
General Physics
Oct 9, 2017
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22
Physicists from the ATLAS Experiment at CERN have presented exciting new results at the 10th International Workshop on Top Quark Physics (TOP2017), held in Braga (Portugal). The conference brought together experimental ...
General Physics
Sep 27, 2017
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29
As the Large Hadron Collider (LHC) smashes protons at a centre-of-mass energy of 13 TeV, it creates a rich assortment of particles that are identified through the signature of their interactions with the ATLAS detector. But ...
General Physics
Jul 27, 2017
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14
Since resuming operation for Run 2, the Large Hadron Collider (LHC) has been producing about 20,000 Higgs bosons per day in its 13 TeV proton–proton collisions. At the end of 2015, the data collected by the ATLAS and CMS ...
General Physics
Jul 26, 2017
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468
Cosmological and astrophysical observations based on gravitational interactions indicate that the matter described by the Standard Model of particle physics constitutes only a small fraction of the entire known universe. ...
General Physics
Jul 20, 2017
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78
Although the discovery of the Higgs boson by the ATLAS and CMS Collaborations in 2012 completed the Standard Model, many mysteries remain unexplained. For instance, why is the mass of the Higgs boson so much lighter than ...
General Physics
Jul 17, 2017
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54
Previously, the Higgs boson has been observed decaying to photons, tau-leptons, and W and Z bosons. However, these impressive achievements represent only 30 percent of Higgs boson decays. The Higgs boson's favoured decay ...
General Physics
Jul 11, 2017
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