A portrait of the Higgs boson by the CMS experiment ten years after the discovery

TL;DR

A comprehensive review of a decade of Higgs boson research by CMS, detailing its properties, decay channels, and compatibility with the Standard Model, based on significantly increased data.

Contribution

This paper provides the most recent combined analysis of Higgs boson properties from CMS, including new limits on Higgs pair production, using ten years of data at 13 TeV.

Findings

Higgs boson properties are consistent with Standard Model predictions.

Established the most stringent limit on Higgs pair production cross section.

Observed Higgs in multiple decay channels, confirming its quantum numbers.

Abstract

In July 2012, the ATLAS and CMS Collaborations at the CERN Large Hadron Collider announced the observation of a Higgs boson at a mass of around 125 GeV. Ten years later, and with the data corresponding to the production of 30 times larger number of Higgs bosons, we have learnt much more about the properties of the Higgs boson. The CMS experiment has observed the Higgs boson in numerous fermionic and bosonic decay channels, established its spin-parity quantum numbers, determined its mass and measured its production cross sections in various modes. Here the CMS Collaboration reports the most up-to-date combination of results on the properties of the Higgs boson, including the most stringent limit on the cross section for the production of a pair of Higgs bosons, on the basis of data from proton-proton collisions at a centre-of-mass energy of 13 TeV. Within the uncertainties, all these observations are compatible with the predictions of the standard model of elementary particle physics. Much evidence points to the fact that the standard model is a low-energy approximation of a more comprehensive theory. Several of the standard model issues originate in the sector of Higgs boson physics. An order of magnitude larger number of Higgs bosons, expected to be examined over the next fifteen years, will help deepen our understanding of this crucial sector.