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

ContributorsCDF Collaboration
Publication date2013

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.

Citation (ISO format)
CDF Collaboration. Measurement of <em>W</em>-boson polarization in top-quark decay using the full CDF Run II data set. In: Physical review. D. Particles, fields, gravitation, and cosmology, 2013, vol. 87, n° 03, p. 031104. doi: 10.1103/PhysRevD.87.031104
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Article (Published version)
ISSN of the journal1550-2368

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