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Search for New Bottomlike Quark Pair Decays QQ[over-bar] -->(tW[superscript ∓])(t[over-bar] W[superscript ±]) in Same-Charge Dilepton Events

Author(s)
Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Paus, Christoph M. E.; Bauer, Gerry P; Makhoul, Khaldoun
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Alternative title
Search for New Bottomlike Quark Pair Decays QQ̅ →(tW∓)(t̅ W±) in Same-Charge Dilepton Events
Terms of use
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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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.
Date issued
2010-03
URI
http://hdl.handle.net/1721.1/58839
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
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
ISSN
0031-9007

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