Evidence for a particle produced in association with weak bosons and decaying to a bottom-antibottom quark pair in Higgs boson searches at the Tevatron

TL;DR

This paper presents combined results from the Tevatron experiments indicating evidence for a Higgs boson produced with W/Z bosons and decaying into bottom quark pairs, with a significance of about 3.1 sigma.

Contribution

It provides the first combined analysis from CDF and D0 showing evidence for the Higgs boson in the b-bbar decay channel at the Tevatron.

Findings

Observed excess consistent with Higgs production

Significance of 3.1 standard deviations

Mass range of 120-135 GeV/c^2

Abstract

We combine searches by the CDF and D0 Collaborations for the associated production of a Higgs boson with a W or Z boson and subsequent decay of the Higgs boson to a bottom-antibottom quark pair. The data, originating from Fermilab Tevatron p-pbar collisions at sqrt{s}=1.96 TeV, correspond to integrated luminosities of up to 9.7 fb^-1. The searches are conducted for a Higgs boson with mass in the range 100-150 GeV/c^2. We observe an excess of events in the data compared with the background predictions, which is most significant in the mass range between 120 and 135 GeV/c^2. The largest local significance is 3.3 standard deviations, corresponding to a global significance of 3.1 standard deviations. We interpret this as evidence for the presence of a new particle consistent with the standard model Higgs boson, which is produced in association with a weak vector boson and decays to a bottom-antibottom quark pair.