Search for Higgs boson decays to a photon and a Z boson in pp collisions at $\sqrt{s}$=7 and 8 TeV with the ATLAS detector

Philip James Clark, Victoria Jane Martin, Corrinne Mills, Atlas Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

A search is reported for a neutral Higgs boson in the decay channel H→Zγ , Z→ℓ+ℓ− ( ℓ=e,μ ), using 4.5 fb −1 of pp collisions at s=7 TeV and 20.3 fb −1 of pp collisions at s=8 TeV , recorded by the ATLAS detector at the CERN Large Hadron Collider. The observed distribution of the invariant mass of the three final-state particles, mℓℓγ , is consistent with the Standard Model hypothesis in the investigated mass range of 120–150 GeV. For a Higgs boson with a mass of 125.5 GeV, the observed upper limit at the 95% confidence level is 11 times the Standard Model expectation. Upper limits are set on the cross section times branching ratio of a neutral Higgs boson with mass in the range 120–150 GeV between 0.13 and 0.5 pb for s=8 TeV at 95% confidence level.
Original languageEnglish
Article numberAad:2014fia
Pages (from-to)8-27
JournalPhysics Letters B
VolumeB732
DOIs
Publication statusPublished - 1 May 2014

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