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Search for new bottomlike quark pair decays QQ-->(tW(+)(-))(tW(+)(-)in same-charge dilepton events.

Abstract:
We report the most restrictive direct limits on masses of fourth-generation down-type quarks b{'}, and quarklike composite fermions (B or T{5/3}), 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 pp collisions with an integrated luminosity of 2.7 fb{-1} collected with the CDF II detector at Fermilab yields no evidence for such a signal, setting mass limits m{b{'}}, m{B}>338 GeV/c{2} and m{T{5/3}}>365 GeV/c{2} at 95% confidence level.

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Publisher copy:
10.1103/physrevlett.104.091801

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Journal:
Physical Review Letters More from this journal
Volume:
104
Issue:
9
Pages:
091801
Publication date:
2010-03-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007


Language:
English
Keywords:
Pubs id:
pubs:124761
UUID:
uuid:f17db748-3cd4-4c24-8ade-281bd1641472
Local pid:
pubs:124761
Source identifiers:
124761
Deposit date:
2012-12-19
ARK identifier:

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