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Título: | Measurement of W-boson polarization in top-quark decay using 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: | 2013 | Editor: | American Physical Society | Citación: | Physical Review D 87: 031104(R) (2013) | Resumen: | We measure the polarization of W bosons from top-quark (t) decays into final states with a charged lepton and jets, tt̄→W+bW -b̄→ℓνbqq̄′b̄, using the full Run II data set collected by the CDF II detector, corresponding to an integrated luminosity of 8.7 fb-1. A model-independent method simultaneously determines the fraction of longitudinal (f0) and right-handed (f+) W bosons to yield f0=0.726±0. 066(stat)±0.067(syst) and f+=-0.045±0.044(stat) ±0.058(syst) with a correlation coefficient of -0.69. Additional results are presented under various standard model assumptions. No significant discrepancies with the standard model are observed. © 2013 American Physical Society. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevD.87.031104 | URI: | http://hdl.handle.net/10261/110030 | DOI: | 10.1103/PhysRevD.87.031104 | Identificadores: | doi: 10.1103/PhysRevD.87.031104 issn: 1550-7998 e-issn: 1550-2368 |
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boson polarization in top-quark.pdf | 224,97 kB | Adobe PDF | Visualizar/Abrir |
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