Journal Article

A detailed map of Higgs boson interactions by the ATLAS experiment ten years after the discovery

None, None

2022

Overview

The standard model of particle physics 1 – 4 describes the known fundamental particles and forces that make up our Universe, with the exception of gravity. One of the central features of the standard model is a field that permeates all of space and interacts with fundamental particles 5 – 9 . The quantum excitation of this field, known as the Higgs field, manifests itself as the Higgs boson, the only fundamental particle with no spin. In 2012, a particle with properties consistent with the Higgs boson of the standard model was observed by the ATLAS and CMS experiments at the Large Hadron Collider at CERN 10 , 11 . Since then, more than 30 times as many Higgs bosons have been recorded by the ATLAS experiment, enabling much more precise measurements and new tests of the theory. Here, on the basis of this larger dataset, we combine an unprecedented number of production and decay processes of the Higgs boson to scrutinize its interactions with elementary particles. Interactions with gluons, photons, and W and Z bosons—the carriers of the strong, electromagnetic and weak forces—are studied in detail. Interactions with three third-generation matter particles (bottom ( b ) and top ( t ) quarks, and tau leptons ( τ )) are well measured and indications of interactions with a second-generation particle (muons, μ ) are emerging. These tests reveal that the Higgs boson discovered ten years ago is remarkably consistent with the predictions of the theory and provide stringent constraints on many models of new phenomena beyond the standard model. Ten years after the discovery of the Higgs boson, the ATLAS  experiment at CERN probes its kinematic properties with a significantly larger dataset from 2015–2018 and provides further insights on its interaction with other known particles.

• Publisher: Nature Publishing Group UK,Nature Publishing Group
• Subject: 639/766/419 / 639/766/419/1131 / Atoms & subatomic particles / Bosons / Constraint modelling / Elementary particles / Experimental particle physics / Experiments / Gluons / Higgs bosons / Humanities and Social Sciences / Large Hadron Collider / Leptons / Magnetic properties / Modelling / multidisciplinary / Muons / Particle physics / Particle spin / Photons / Quarks / Science / Science (multidisciplinary) / Sensors / Solenoids / Standard model (particle physics)