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Type: Journal article
Title: Search for down-type fourth generation quarks with the ATLAS detector in events with one lepton and hadronically decaying W bosons
Author: Aad, G.
Citation: Physical Review Letters, 2012; 109(3):032001-1-032001-19
Publisher: American Physical Society
Issue Date: 2012
ISSN: 0031-9007
Statement of
G. Aad, B. Abbott ... Martin White ... Lawrence Lee-Jr ... Paul Jackson Andreas Petridis,
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′¯b′→W−tW+¯t→b¯bW+W−W+W−→l±νb¯bq¯qq¯qq¯q. 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−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.
Keywords: ATLAS Collaboration
Rights: © 2012 CERN, for the ATLAS Collaboration. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
DOI: 10.1103/PhysRevLett.109.032001
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