Standard Model Higgs Searches at the Tevatron

TL;DR

This paper reports on direct searches for the Standard Model Higgs boson at the Tevatron using the full Run II dataset, observing a modest excess of events around 115-135 GeV/c² that aligns with signals seen by ATLAS and CMS.

Contribution

It provides the first comprehensive search results for the Higgs boson at the Tevatron with the complete dataset, highlighting an excess consistent with a low-mass Higgs.

Findings

Observed an excess of events with up to 2.7 sigma local significance.

Excess concentrated in the H→bar b channel.

Results are compatible with a low-mass Higgs boson.

Abstract

We present the results of direct searches for the standard model Higgs boson at the Tevatron. Results are derived from the complete Tevatron Run II dataset, with a measured integrated luminosity of 10 fb$^{-1}$ of proton-antiproton data. The searches are performed for assumed Higgs masses between 90 and 200 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 115 and 135 GeV/c$^2$, consistent with the Higgs-like particle recently observed by ATLAS and CMS. The largest local significance is 2.7 standard deviations, corresponding to a global significance of 2.2 standard deviations. We also combine separate searches for $H\rightarrow b\bar b$ and $H\rightarrow W^+W^-$, and find that the excess is concentrated in the $H\rightarrow b\bar b$ channel, although the results in the $H\rightarrow W^+W^-$ channel are still consistent with the possible presence of a low-mass Higgs boson.