Search for the Higgs boson in the all-hadronic final state using the full CDF data set

TL;DR

This study searches for the standard model Higgs boson in all-hadronic final states using the full CDF dataset, setting upper limits on production rates for Higgs masses below 135 GeV/c2.

Contribution

First comprehensive search for Higgs in all-hadronic channels using the full CDF data set, providing new upper limits on production rates.

Findings

No significant excess over background observed.

Median expected limit for 125 GeV/c2 Higgs is 11.0 times the SM prediction.

Observed limit for 125 GeV/c2 Higgs is 9.0 times the SM prediction.

Abstract

This paper reports the result of a search for the standard model Higgs boson in events containing four reconstructed jets associated with quarks. For masses below 135GeV/c2, Higgs boson decays to bottom-antibottom quark pairs are dominant and result primarily in two hadronic jets. An additional two jets can be produced in the hadronic decay of a W or Z boson produced in association with the Higgs boson, or from the incoming quarks that produced the Higgs boson through the vector-boson fusion process. The search is performed using a sample of \sqrt{s} = 1.96 TeV proton-antiproton collisions corresponding to an integrated luminosity of 9.45 fb-1 recorded by the CDF II detector. The data are in agreement with the background model and 95% credibility level upper limits on Higgs boson production are set as a function of the Higgs boson mass. The median expected (observed) limit for a 125GeV/c2 Higgs boson is 11.0 (9.0) times the predicted standard model rate.