Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments

TL;DR

This paper reports a precise combined measurement of the Higgs boson mass using data from ATLAS and CMS at CERN, analyzing two decay channels to achieve a high-accuracy result.

Contribution

It presents a novel combined analysis of data from two major experiments and two decay channels, improving the precision of the Higgs boson mass measurement.

Findings

Measured Higgs mass: 125.09 GeV with uncertainties

Consistent results across channels and experiments

Enhanced precision over previous measurements

Abstract

A measurement of the Higgs boson mass is presented based on the combined data samples of the ATLAS and CMS experiments at the CERN LHC in the $H \rightarrow \gamma\gamma$ and $H \rightarrow ZZ\rightarrow 4\ell$ decay channels. The results are obtained from a simultaneous fit to the reconstructed invariant mass peaks in the two channels and for the two experiments. The measured masses from the individual channels and the two experiments are found to be consistent among themselves. The combined measured mass of the Higgs boson is $m_{H} = 125.09\pm0.21\,\mathrm{(stat.)}\pm0.11\,\mathrm{(syst.)}~\mathrm{GeV}$.