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Measurement of W-boson polarization in top-quark decay using the full CDF Run II data set

Abstract: We measure the polarization of W bosons from top-quark (t) decays into final states with a charged lepton and jets, t¯t?W+bW?¯b???bq¯q?¯b, 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

Autoría: Aaltonen T., Amerio S., Amidei D., Anastassov A., Annovi A., Antos J., Apollinari G., Appel J.A., Arisawa T., Artikov A., Asaadi J., Ashmanskas W., Auerbach B., Aurisano A., Azfar F., Badgett W., Bae T., Barbaro-Galtieri A., Barnes V.E., Barnett B.A., Barria P., Bartos P., Bauce M., Bedeschi F., Behari S., Bellettini G., Bellinger J., Benjamin D., Beretvas A., Bhatti A., Bland K.R., Blumenfeld B., Bocci A., Bodek A., Bortoletto

Fuente: Physical Review D - Particles, Fields, Gravitation and Cosmology 2013, 87, 031104(R)

Editorial: American Physical Society

Año de publicación: 2013

Nº de páginas: 8

Tipo de publicación: Artículo de Revista

DOI: 10.1103/PhysRevD.87.031104

ISSN: 1550-7998,1550-2368,2470-0010,2470-0029

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