Combined CDF and Dzero Upper Limits on Standard Model Higgs Boson Production at High Mass (155-200 GeV/c2) with 3 fb-1 of data

TL;DR

This paper combines results from CDF and DZero experiments at Fermilab to set upper limits on the Standard Model Higgs boson production in the high mass range, excluding a Higgs at 170 GeV with 3 fb-1 of data.

Contribution

It presents the combined analysis of CDF and DZero data, improving limits and excluding the Higgs boson at 170 GeV, advancing the search beyond previous results.

Findings

Excluded Higgs at 170 GeV at 95% CL.

Upper limits are close to the Standard Model predictions.

Extended the mass exclusion range with more data and refined techniques.

Abstract

We combine results from CDF and DO searches for a standard model Higgs boson in ppbar collisions at the Fermilab Tevatron, at sqrt{s}=1.96 TeV. With 3.0 fb-1 of data analyzed at CDF, and at DO, the 95% C.L. upper limits on Higgs boson production are a factor of 1.2, 1.0 and 1.3 higher than the SM cross section for a Higgs boson mass of m_{H}=$165, 170 and 175 GeV, respectively. We exclude at 95% C.L. a standard model Higgs boson of m_H=170 GeV. Based on simulation, the ratios of the corresponding median expected upper limit to the Standard Model cross section are 1.2, 1.4 and 1.7. Compared to the previous Higgs Tevatron combination, more data and refined analysis techniques have been used. These results extend significantly the individual limits of each experiment and provide new knowledge on the mass of the standard model Higgs boson beyond the LEP direct searches.