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Título: | Measurement of B(t →wb)/B (t →wq) in top-quark-pair decays using dilepton events and the full CDF run II data set |
Autor: | Aaltonen, T.; Casal, Bruno CSIC; Cuevas, Javier CSIC ORCID; Gómez, Gervasio CSIC ORCID ; Palencia, Enrique CSIC ORCID; Ruiz Jimeno, Alberto CSIC ORCID ; Scodellaro, Luca CSIC ORCID ; Vilar Cortabitarte, R. CSIC ORCID; Vizán, J. CSIC ORCID; CDF Collaboration | Fecha de publicación: | 2014 | Editor: | American Physical Society | Citación: | Physical Review Letters 112: 221801 (2014) | Resumen: | 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 8.7fb-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. © 2014 American Physical Society. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.112.221801 | URI: | http://hdl.handle.net/10261/110406 | DOI: | 10.1103/PhysRevLett.112.221801 | Identificadores: | doi: 10.1103/PhysRevLett.112.221801 e-issn: 1079-7114 issn: 0031-9007 |
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in top-quark-pair decays using dilepton.pdf | 194,11 kB | Adobe PDF | Visualizar/Abrir |
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