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Combination of searches for the Higgs boson using the full CDF data set


CDF Collaboration; et al; Canelli, F; Kilminster, B (2013). Combination of searches for the Higgs boson using the full CDF data set. Physical Review D (Particles, Fields, Gravitation and Cosmology), 88(5):052013.

Abstract

We present a combination of searches for the standard model Higgs boson using the full CDF run II data set, which corresponds to an integrated luminosity of 9.45–10.0  fb−1 collected from s√=1.96  TeV pp¯ collisions at the Fermilab Tevatron. The searches consider Higgs boson production from gluon-gluon fusion, vector-boson fusion, and associated production with either a W or Z boson or a tt¯ pair. Depending on the production mode, Higgs boson decays to W+W−, ZZ, bb¯, τ+τ−, and γγ are examined. We search for a Higgs boson with masses (mH) in the range 90–200  GeV/c2. In the absence of a signal, we expect based on combined search sensitivity to exclude at the 95% credibility level the mass regions 90<mH<94  GeV/c2, 96<mH<106  GeV/c2, and 153<mH<175  GeV/c2. The observed exclusion regions are 90<mH<102  GeV/c2 and 149<mH<172  GeV/c2. A moderate excess of signal-like events relative to the background expectation at the level of 2.0 standard deviations is present in the data for the mH=125  GeV/c2 search hypothesis. We also present interpretations of the data within the context of a fermiophobic model and an alternative standard model incorporating a fourth generation of fermions. Finally, for the hypothesis of a new particle with mass 125  GeV/c2, we constrain the coupling strengths of the new particle to W± bosons, Z bosons, and fermions.

Abstract

We present a combination of searches for the standard model Higgs boson using the full CDF run II data set, which corresponds to an integrated luminosity of 9.45–10.0  fb−1 collected from s√=1.96  TeV pp¯ collisions at the Fermilab Tevatron. The searches consider Higgs boson production from gluon-gluon fusion, vector-boson fusion, and associated production with either a W or Z boson or a tt¯ pair. Depending on the production mode, Higgs boson decays to W+W−, ZZ, bb¯, τ+τ−, and γγ are examined. We search for a Higgs boson with masses (mH) in the range 90–200  GeV/c2. In the absence of a signal, we expect based on combined search sensitivity to exclude at the 95% credibility level the mass regions 90<mH<94  GeV/c2, 96<mH<106  GeV/c2, and 153<mH<175  GeV/c2. The observed exclusion regions are 90<mH<102  GeV/c2 and 149<mH<172  GeV/c2. A moderate excess of signal-like events relative to the background expectation at the level of 2.0 standard deviations is present in the data for the mH=125  GeV/c2 search hypothesis. We also present interpretations of the data within the context of a fermiophobic model and an alternative standard model incorporating a fourth generation of fermions. Finally, for the hypothesis of a new particle with mass 125  GeV/c2, we constrain the coupling strengths of the new particle to W± bosons, Z bosons, and fermions.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2013
Deposited On:19 Feb 2014 16:37
Last Modified:05 Apr 2016 17:37
Publisher:American Physical Society
ISSN:1550-2368
Publisher DOI:https://doi.org/10.1103/PhysRevD.88.052013

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