Combined measurements of Higgs boson couplings in proton-proton collisions at $\sqrt{s} =$ 13 TeV

TL;DR

This paper reports combined measurements of Higgs boson production and decay rates at 13 TeV, confirming consistency with the Standard Model and constraining alternative models using CMS data from 2016.

Contribution

It provides the first comprehensive combination of Higgs coupling measurements at 13 TeV with detailed analysis of production and decay modes.

Findings

Measured signal strength ratio μ = 1.17 ± 0.10

Results are compatible with Standard Model predictions

Constraints on two Higgs doublet models

Abstract

Combined measurements of the production and decay rates of the Higgs boson, as well as its couplings to vector bosons and fermions, are presented. The analysis uses the LHC proton-proton collision data set recorded with the CMS detector in 2016 at $\sqrt{s} =$ 13 TeV, corresponding to an integrated luminosity of 35.9 fb$^{-1}$. The combination is based on analyses targeting the five main Higgs boson production mechanisms (gluon fusion, vector boson fusion, and associated production with a W or Z boson, or a top quark-antiquark pair) and the following decay modes: H $\to$ $\gamma\gamma$, ZZ, WW, $\tau\tau$, bb, and $\mu\mu$. Searches for invisible Higgs boson decays are also considered. The best-fit ratio of the signal yield to the standard model expectation is measured to be $\mu$ $=$ 1.17 $\pm$ 0.10, assuming a Higgs boson mass of 125.09 GeV. Additional results are given for parametrizations with varying assumptions on the scaling behavior of the different production and decay modes, including generic ones based on ratios of cross sections and branching fractions or coupling modifiers. The results are compatible with the standard model predictions in all parametrizations considered. In addition, constraints are placed on various two Higgs doublet models.