Standard Model Higgs boson searches with the ATLAS detector at the Large Hadron Collider

TL;DR

This paper reports on the search for the Standard Model Higgs boson using ATLAS data from the LHC, setting exclusion limits in various mass ranges but finding no significant signal.

Contribution

First comprehensive search for the Standard Model Higgs boson at 7 TeV with 1-2 fb^-1 data using ATLAS, establishing exclusion limits across multiple mass regions.

Findings

No significant excess observed over Standard Model background.

Higgs boson production excluded at 95% CL in specified mass ranges.

Results constrain the possible mass of the Standard Model Higgs boson.

Abstract

The investigation of the mechanism responsible for electroweak symmetry breaking is one of the most important tasks of the scientific program of the Large Hadron Collider. The experimental results on the search of the Standard Model Higgs boson with 1 to 2 fb^-1 of proton proton collision data at sqrt s=7 TeV recorded by the ATLAS detector are presented and discussed. No significant excess of events is found with respect to the expectations from Standard Model processes, and the production of a Higgs boson is excluded at 95% Confidence Level for the mass regions 144-232, 256-282 and 296-466 GeV.