Combined Tevatron upper limit on gg->H->W+W- and constraints on the Higgs boson mass in fourth-generation fermion models

TL;DR

This paper combines Tevatron data to set upper limits on Higgs production and decay to W+W-, and constrains the Higgs mass in models with a fourth-generation of fermions, excluding certain mass ranges.

Contribution

It provides the first combined Tevatron limits on gg->H->W+W- and constrains Higgs mass in fourth-generation fermion models.

Findings

Excluded Higgs mass between 131 and 204 GeV in fourth-generation models.

Set upper limits on Higgs production cross-section at various masses.

Provided combined Tevatron results with 4.8-5.4 fb^{-1} of data.

Abstract

We combine results from searches by the CDF and D0 collaborations for a standard model Higgs boson (H) in the process gg->H->W+W- in p=pbar collisions at the Fermilab Tevatron Collider at sqrt{s}=1.96 TeV. With 4.8 fb-1 of integrated luminosity analyzed at CDF and 5.4 fb-1 at D0, the 95% Confidence Level upper limit on \sigma(gg->H) x B(H->W+W-) is 1.75 pb at m_H=120 GeV, 0.38 pb at m_H=165 GeV, and 0.83 pb at m_H=200 GeV. Assuming the presence of a fourth sequential generation of fermions with large masses, we exclude at the 95% Confidence Level a standard-model-like Higgs boson with a mass between 131 and 204 GeV.