Search for Down-Type Fourth Generation Quarks with the ATLAS Detector in Events with One Lepton and Hadronically Decaying W Bosons
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Aad-2012-Search for Down-Type.pdf
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498.71 KB
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Adobe PDF
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Author(s)
Taylor, Frank E.
Date Issued
July 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
G. Aad et al. “Search for Down-Type Fourth Generation Quarks with the ATLAS Detector in Events with One Lepton and Hadronically Decaying W Bosons.” Physical Review Letters 109 (2012).
Version
Final published version
Abstract
This Letter presents a search for pair production of heavy down-type quarks decaying via b′→Wt in the lepton+jets channel, as b′b̅ ′→W[superscript -]tW[superscript +]t̅ →bb̅ W[superscript +]W[superscript -]W[superscript +]W[superscript -]→l[superscript ±]νbb̅ qq̅ qq̅ qq̅ . In addition to requiring exactly one lepton, large missing transverse momentum, and at least six jets, the invariant mass of nearby jet pairs is used to identify high transverse momentum W bosons. In data corresponding to an integrated luminosity of 1.04 fb[superscript -1] from pp collisions at √s=7 TeV recorded with the ATLAS detector, a heavy down-type quark with mass less than 480 GeV can be excluded at the 95% confidence level.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution 3.0
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.109.032001
