Search for a Higgs Boson in the Diphoton Final State in p-pbar Collisions at sqrt(s) = 1.96 TeV

TL;DR

This paper reports a search for a Higgs boson decaying into two photons in proton-antiproton collisions, setting limits on its production and excluding certain mass ranges within the standard model and fermiophobic scenarios.

Contribution

First search for a diphoton Higgs resonance at Tevatron energies, providing new exclusion limits and constraining Higgs models.

Findings

No evidence of a Higgs resonance was observed.

Excluded fermiophobic Higgs bosons below 114 GeV/c^2.

Set upper limits on cross section times branching ratio.

Abstract

A search for a narrow Higgs boson resonance in the diphoton mass spectrum is presented based on data corresponding to 7.0 fb^-1 of integrated luminosity from p-pbar collisions at sqrt(s) = 1.96 TeV collected by the CDF experiment. No evidence of such a resonance is observed, and upper limits are set on the cross section times branching ratio of the resonant state as a function of Higgs boson mass. The limits are interpreted in the context of the standard model and one fermiophobic benchmark model where the data exclude fermiophobic Higgs bosons with masses below 114 GeV/c^2 at a 95% Bayesian credibility level.