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 p (p) over bar 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.

T., A., J., A., B. A., G., S., A., D., A., A., A., et al. (2010). Search for New Bottomlike Quark Pair Decays Q(Q)over-bar -> (tW -/+)((t)over-bar W +/- in Same-Charge Dilepton Events. PHYSICAL REVIEW LETTERS, 104, 091801-1-091801-8 [10.1103/PhysRevLett.104.091801].

Search for New Bottomlike Quark Pair Decays Q(Q)over-bar -> (tW -/+)((t)over-bar W +/- in Same-Charge Dilepton Events

CIOCCI, MARIA AGNESE;
2010-01-01

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 p (p) over bar 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.
2010
T., A., J., A., B. A., G., S., A., D., A., A., A., et al. (2010). Search for New Bottomlike Quark Pair Decays Q(Q)over-bar -> (tW -/+)((t)over-bar W +/- in Same-Charge Dilepton Events. PHYSICAL REVIEW LETTERS, 104, 091801-1-091801-8 [10.1103/PhysRevLett.104.091801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/35661
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