The new result combines 15 previous measurements to give the most precise determination of the top-quark mass to date

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

Precise knowledge of the top-quark mass is of paramount importance to understand our world at the smallest scale

With its high statistical significance, the result represents the first observation of electroweak top-quark–photon production

In the seventh part of the “LHC Physics at Ten” series, we look at the surprising phenomena of the Standard Model at high energies

The result opens the path to study in a new and unique way the extreme state of matter that is thought to have existed shortly after the Big Bang

The ATLAS and CMS collaborations used the full LHC Run 2 dataset to obtain new insights into the interaction

The CMS collaboration has measured for the first time the variation, or “running”, of the top-quark mass

ATLAS and CMS present new measurements of the properties of the Higgs boson

Top marks for the Standard Model as LHC experiments ATLAS and CMS study the subtle behaviour of the heaviest particle

Scientists working at LHC and Tevatron colliders join forces to produce more precise measurement of the mass of the top quark