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Search for new bottomlike quark pair decays QQ¯?(tW) (t¯W±) 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 T5/3), decaying promptly to tW?. We search for a significant excess of events with two same-charge leptons (e, ?), several hadronic jets, and missing transverse energy. An analysis of data from p¯p 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 mb?, mB>338??GeV/c2 and mT5/3>365??GeV/c2 at 95% confidence level.

 Autoría: Aaltonen T., Adelman J., González B.A., Amerio S., Amidei D., Anastassov A., Annovi A., Antos J., Apollinari G., Apresyan A., Arisawa T., Artikov A., Asaadi J., Ashmanskas W., Attal A., Aurisano A., Azfar F., Badgett W., Barbaro-Galtieri A., Barnes V.E., Barnett B.A., Barria P., Bartos P., Bauer G., Beauchemin P.H., Bedeschi F., Beecher D., Behari S., Bellettini G., Bellinger J., Benjamin D., Beretvas A., Berge D., Bhatti A., Bi

 Fuente: Physical Review Letters, 2010, 104(9), 091801

 Editorial: American Physical Society

 Fecha de publicación: 01/03/2010

 Nº de páginas: 8

 Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.104.091801

 ISSN: 0031-9007,1079-7114

 Url de la publicación: https://doi.org/10.1103/PhysRevLett.104.091801

Autoría

AALTONEN, T.

BARBARA ALVAREZ GONZALEZ

BRUNO CASAL LARAÑA

FRANCISCO JAVIER CUEVAS MAESTRO