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Measurement of B(t?Wb)/B(t?Wq) in Top-Quark-Pair Decays Using Dilepton Events and the Full CDF Run II Data Set

Abstract: We present a measurement of the ratio of the top-quark branching fractions R=B(t?Wb)/B(t?Wq), where q represents any quark flavor, in events with two charged leptons, imbalance in total transverse energy, and at least two jets. The measurement uses proton-antiproton collision data at center-of-mass energy 1.96 TeV, corresponding to an integrated luminosity of 8.7??fb-1 collected with the Collider Detector at Fermilab during Run II of the Tevatron. We measure R to be 0.87±0.07, and extract the magnitude of the top-bottom quark coupling to be |Vtb|=0.93±0.04, assuming three generations of quarks. Under these assumptions, a lower limit of |Vtb|>0.85(0.87) at 95% (90%) credibility level is set.

 Fuente: Phys. Rev. Lett. Vol. 112, Num. 22, Pag. 221801 (2014)

 Editorial: American Physical Society

 Fecha de publicación: 01/06/2014

 Nº de páginas: 7

 Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.112.221801

 ISSN: 0031-9007,1079-7114

 Proyecto español: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

 Url de la publicación: https://doi.org/10.1103/PhysRevLett.112.221801

Autoría

AALTONEN, TIMO ANTERO

BRUNO CASAL LARAÑA

FRANCISCO JAVIER CUEVAS MAESTRO

JOSE ENRIQUE PALENCIA CORTEZON