Search for New Bottomlike Quark Pair Decays QQ[over-bar] -->(tW[superscript ∓])(t[over-bar] W[superscript ±]) in Same-Charge Dilepton Events
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Aaltonen-2010-Search for New Bottomlike Quark Pair Decays .pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Bauer, Gerry P
Makhoul, Khaldoun
Alternative Title
Search for New Bottomlike Quark Pair Decays QQ̅ →(tW∓)(t̅ W±) in Same-Charge Dilepton Events
Date Issued
March 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Search for New Bottomlike Quark Pair Decays QQ[over -bar]-->(tW[superscript ±])(t[over -bar]Wsuperscript ±]) in Same-Charge Dilepton Events.” Physical Review Letters 104.9 (2010): 091801. © 2010 The American Physical Society.
Version
Final published version
Abstract
We report the most restrictive direct limits on masses of fourth-generation down-type quarks b′, and quarklike composite fermions (B or T5/3), decaying promptly to tW∓. We search for a significant excess of events with two same-charge leptons (e, mu), several hadronic jets, and missing transverse energy. An analysis of data from pp̅ collisions with an integrated luminosity of 2.7 fb[superscript -1] collected with the CDF II detector at Fermilab yields no evidence for such a signal, setting mass limits mb′, mB>338 GeV/c[superscript 2] and mT5/3>365 GeV/c[superscript 2] at 95% confidence level.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.104.091801
