Measurement of properties of the Higgs boson in bosonic decay channels using the ATLAS detector

TL;DR

This paper reports precise measurements of the Higgs boson's properties in various bosonic decay channels using ATLAS data, including an improved mass measurement that refines previous results.

Contribution

It provides the most accurate Higgs boson mass measurement to date from ATLAS using combined decay channels and data from LHC run-1.

Findings

Higgs boson mass measured as 125.36 ± 0.41 GeV

Improved precision over previous ATLAS results

Confirmation of Higgs boson properties in bosonic channels

Abstract

The properties of the Higgs boson measured in bosonic decay channels ($H \rightarrow \gamma\gamma$, $H \rightarrow ZZ^* \rightarrow 4\ell$, $H \rightarrow WW^{*} \rightarrow \ell\nu\ell\nu$, $H \rightarrow Z\gamma$) with 25 fb$^{-1}$ of pp collision data from the Large Hadron Collider run-1 collected by the ATLAS experiment are presented. The results include an improved measurement of the mass of the Higgs boson from a combined fit to the invariant mass spectra of the decay channels $H \rightarrow \gamma\gamma$ and $H \rightarrow ZZ^* \rightarrow 4\ell$, which yields $m_H = 125.36 \pm 0.37$ (stat) $\pm 0.18$ (syst) GeV = $125.36 \pm 0.41$ GeV and supersedes the previous result from ATLAS.