Search for non-SM Light Higgs Boson in the h -> to gamma gamma Channel at D0 in Run II

TL;DR

This paper reports a search for a non-Standard Model light Higgs boson decaying into two photons, using data from the D0 detector at Fermilab, setting limits on its branching fraction across various mass hypotheses.

Contribution

The study provides the first limits on non-SM light Higgs bosons with enhanced diphoton decay modes at the Tevatron.

Findings

Set 95% CL limits on diphoton branching fractions

Excluded certain mass ranges for Fermiophobic Higgs

Provided constraints on Topcolor Higgs scenarios

Abstract

A search for non-SM light Higgs boson with an enhanced branching fraction into photons in ppbar collisions at the Fermilab Tevatron is presented using Run II DO data taken between April 2002 and September 2003. We set 95% CL limits on the diphoton branching fraction as a function of Higgs mass for Fermiophobic and Topcolor Higgs scenarios.