Tag: top quark
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CMS strengthens the case for toponium
A new independent measurement by the CMS experiment at the LHC is consistent with the existence of the most massive composite particle ever observed, the momentary union of a top quark and its antiquark
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Elusive romance of top-quark pairs observed at the LHC
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
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CMS finds unexpected excess of top quarks
Data from the CMS experiment at CERN’s Large Hadron Collider reveals an intriguing excess of top-quark pairs, hinting at the first observation of a composite particle with unique properties
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Clocking nature’s heaviest elementary particle
The CMS collaboration has tested whether top quarks play by Einstein’s rules all day and all night
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ATLAS observes top quarks in lead–lead collisions
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
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Decoding top quarks with precision
The ATLAS experiment at the LHC reveals how pairs of top quarks are produced along with other heavy quarks
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ATLAS and CMS unite to weigh in on the top quark
The new result combines 15 previous measurements to give the most precise determination of the top-quark mass to date
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ATLAS and CMS observe simultaneous production of four top quarks
The ATLAS and CMS collaborations have both observed the simultaneous production of four top quarks, a rare phenomenon that could hold the key to physics beyond the Standard Model
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CMS measures the mass of the top quark with unparalleled accuracy
Precise knowledge of the top-quark mass is of paramount importance to understand our world at the smallest scale