Higgs Boson Studies at the Tevatron

Abstract

We combine searches by the CDF and D0 Collaborations for the standard model Higgs boson with mass in the range 90--200 GeV$/c^2$ produced in the gluon-gluon fusion, $WH$, $ZH$, $t\bar{t}H$, and vector boson fusion processes, and decaying in the $H\to b\bar{b}$, $H\to W^{+}{W}^{-}$, $H\to ZZ$, $H\to {\tau }^{+}{\tau }^{-}$, and $H\to \gamma \gamma$ modes. The data correspond to integrated luminosities of up to 10 fb${}^{-1}$ and were collected at the Fermilab Tevatron in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV. The searches are also interpreted in the context of fermiophobic and fourth generation models. We observe a significant excess of events in the mass range between 115 and 140 GeV/$c^2$. The local significance corresponds to 3.0 standard deviations at $m_H=125$ GeV/$c^2$, consistent with the mass of the Higgs boson observed at the LHC, and we expect a local significance of 1.9 standard deviations. We separately combine searches for $H\to b\bar{b}$, $H\to W^{+}{W}^{-}$, $H\to {\tau }^{+}{\tau }^{-}$, and $H\to \gamma \gamma$. The observed signal strengths in all channels are consistent with the presence of a standard model Higgs boson with a mass of 125 GeV/$c^2$.

Submitted to Phys. Rev. D

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