Inclusive Search for the SM Higgs Boson in the H->gammagamma channel at the LHC

TL;DR

This paper presents a strategy for detecting the Standard Model Higgs boson decaying into two photons at the LHC using CMS data, emphasizing background determination and mass resolution improvements.

Contribution

It introduces a data-driven background estimation method and demonstrates the potential for Higgs discovery with early LHC data in the gamma-gamma channel.

Findings

Expected discovery significance above 5 sigma below 30 fb^-1 for Higgs masses under 140 GeV/c^2.

Effective background modeling using Monte Carlo and data-driven techniques.

High mass resolution due to CMS calorimeter performance.

Abstract

A prospective for the inclusive search of the Standard Model Higgs boson in the decay channel H->gammagamm is presented with the CMS experiment at the LHC. The analysis relies on a strategy to determine the background characteristics and systematics from data. The strategy is applied to a Monte Model of the QCD background, with full simulation of the detector response. The discrimination between signal and background exploits information on photon isolation and kinematics. The resolution for the reconstructed Higgs boson mass profits from the excellent energy resolution of the CMS crystal calorimeter. A discovery significance above 5 sigma is expected at integrated LHC luminosities below 30 inverse femtobarn for Higgs boson masses below 140 GeV/c^2.