Improved Search for a Higgs Boson Produced in Association with Z→l+l- in pp̅ Collisions at √s=1.96  TeV

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Aaltonen , T , Brücken , E , Devoto , F , Mehtälä , P , Orava , R & CDF Collaboration 2010 , ' Improved Search for a Higgs Boson Produced in Association with Z→l+l- in pp̅ Collisions at √s=1.96  TeV ' , Physical Review Letters , vol. 105 , no. 25 , pp. 251802 . https://doi.org/10.1103/PhysRevLett.105.251802

Title: Improved Search for a Higgs Boson Produced in Association with Z→l+l- in pp̅ Collisions at √s=1.96  TeV
Alternative title: Improved Search for a Higgs Boson Produced in Association with Z->l+l- in proton antiproton Collisions at sqrt(s) = 1.96 TeV
Author: Aaltonen, Timo; Brücken, Erik; Devoto, Francesco; Mehtälä, Petteri; Orava, Risto; CDF Collaboration
Contributor organization: Department of Physics
Helsinki Institute of Physics
Date: 2010-12-13
Language: eng
Number of pages: 7
Belongs to series: Physical Review Letters
ISSN: 0031-9007
DOI: https://doi.org/10.1103/PhysRevLett.105.251802
URI: http://hdl.handle.net/10138/24427
Abstract: We present a search for the standard model Higgs boson produced with a Z boson in 4.1 fb^-1 of data collected with the CDF II detector at the Tevatron. In events consistent with the decay of the Higgs boson to a bottom-quark pair and the Z boson to electrons or muons, we set 95% credibility level upper limits on the ZH production cross section times the H -> b bbar branching ratio. Improved analysis methods enhance signal sensitivity by 20% relative to previous searches beyond the gain due to the larger data sample. At a Higgs boson mass of 115 GeV/c^2 we set a limit of 5.9 times the standard model value.We search for the standard model Higgs boson produced with a Z boson in 4.1  fb-1 of integrated luminosity collected with the CDF II detector at the Tevatron. In events consistent with the decay of the Higgs boson to a bottom-quark pair and the Z boson to electrons or muons, we set 95% credibility level upper limits on the ZH production cross section multiplied by the H→bb̅ branching ratio. Improved analysis methods enhance signal sensitivity by 20% relative to previous searches. At a Higgs boson mass of 115  GeV/c2 we set a limit of 5.9 times the standard model cross section.
Description: submitted to Phys. Rev. Lett
Subject: 114 Physical sciences
hep-ex
Peer reviewed: Yes
Usage restriction: restrictedAccess


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