Abstract
Nature (2022) The Standard Model of particle physics 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. The quantum excitation of
this field, known as 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. Since then, more than
30 times as many Higgs bosons have been recorded by the ATLAS experiment,
allowing 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 ($\tau$))
are well measured and indications of interactions with a second-generation
particle (muons, $\mu$) 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.