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Search for Down-Type Fourth Generation Quarks with the ATLAS Detector in Events with One Lepton and Hadronically Decaying W Bosons

ContributorsATLAS Collaboration
Published inPhysical review letters, vol. 109, no. 03, 032001
Publication date2012
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→bbW+W−W+W−→l±νbbqqqqqq. 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.

Citation (ISO format)
ATLAS Collaboration. Search for Down-Type Fourth Generation Quarks with the ATLAS Detector in Events with One Lepton and Hadronically Decaying <em>W</em> Bosons. In: Physical review letters, 2012, vol. 109, n° 03, p. 032001. doi: 10.1103/PhysRevLett.109.032001
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ISSN of the journal0031-9007
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