top quark

The top quark, also known as the t quark (symbol: t) or truth quark, is an elementary particle and a fundamental constituent of matter.

13 results

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

News
Physics
11 October, 2023

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

News
Physics
24 March, 2023

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

News
Physics
19 April, 2022

ATLAS nets top quark produced together with a photon

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

News
Physics
24 March, 2022

Standard Model surprises at high energies

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

Feature
Physics
16 December, 2020
Physics
Feature
16 December, 2020

CMS sees evidence of top quarks in collisions between heavy nuclei

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

News
Physics
09 October, 2020

Searching for matter–antimatter asymmetry in the Higgs boson–top quark interaction

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

News
Physics
29 April, 2020

Run top quark run

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

News
Physics
07 October, 2019
Physics
News
07 October, 2019

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Physics
Physics

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Higgs results take centre stage at annual Moriond conference

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

News
Physics
19 March, 2018

ATLAS and CMS join forces to tackle top-quark asymmetry

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

News
Experiments
20 October, 2017
Experiments
News
20 October, 2017

LHC and Tevatron scientists announce first joint result

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

News
Experiments
19 March, 2014