Search for the Standard Model Higgs boson in the two photon decay channel with the ATLAS detector at the LHC

TL;DR

This paper reports a search for the Standard Model Higgs boson decaying into two photons using ATLAS data at 7 TeV, setting upper limits on its production without observing a significant signal.

Contribution

First search for the Higgs boson in the two photon decay channel at 7 TeV with ATLAS, establishing upper limits on its production cross-section.

Findings

No significant excess observed in the 110-150 GeV range.

Upper limits on cross-section times branching ratio range from 2.0 to 5.8 times the Standard Model prediction.

Data constrains possible Higgs boson signals in the studied mass range.

Abstract

A search for the Standard Model Higgs boson in the two photon decay channel is reported, using 1.08 fb^-1 of proton-proton collision data at a centre-of-mass energy of 7 TeV recorded by the ATLAS detector. No significant excess is observed in the investigated mass range of 110-150 GeV. Upper limits on the cross-section times branching ratio of between 2.0 and 5.8 times the Standard Model prediction are derived for this mass range.