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Title

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

CollaborationWith : Clark, Allan Geoffrey / Wu, Xin
Published in Physical Review. D. 2013, vol. 87, no. 03, p. 031104
Abstract We measure the polarization of W bosons from top-quark (t) decays into final states with a charged lepton and jets, tt→W+bW−b→ℓνbqq′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.
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CDF COLLABORATION. Measurement of W-boson polarization in top-quark decay using the full CDF Run II data set. In: Physical Review. D, 2013, vol. 87, n° 03, p. 031104. https://archive-ouverte.unige.ch/unige:38872

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Deposited on : 2014-07-22

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