Measurement of the Higgs boson mass from the → γγ and ZZ* → 4ℓ channels in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector

G. Aad, ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

An improved measurement of the mass of the Higgs boson is derived from a combined fit to the reconstructed invariant mass spectra of the decay channels H→γγ and HZZ*→4ℓ. The analysis uses the pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at center-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 25  fb−1. The measured value of the Higgs boson mass is m=125.36 ± 0.37(stat) ± 0.18(syst)  GeV. This result is based on improved energy-scale calibrations for photons, electrons, and muons as well as other analysis improvements, and supersedes the previous result from ATLAS. Upper limits on the total width of the Higgs boson are derived from fits to the invariant mass spectra of the H→γγ and HZZ*→4ℓ decay channels.

Original languageEnglish
Article number052004
Number of pages35
JournalPhysical Review
Volume90
Issue number5
DOIs
Publication statusPublished - 9 Sep 2014

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