Measurement of W-boson polarization in top-quark decay using the full CDF Run II data set
We measure the polarization of W bosons from top-quark (t) decays into final states with a charged lepton and jets, tt̅→W[superscript +]bW[superscript -]b̅→ℓνbqq̅′b̅, using the full Run II data set collected by the CDF II detector, corresponding to an integrated luminosity of 8.7 fb[superscript -1]...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2013
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| Online Access: | http://hdl.handle.net/1721.1/78600 https://orcid.org/0000-0002-6047-4211 |
| Summary: | We measure the polarization of W bosons from top-quark (t) decays into final states with a charged lepton and jets, tt̅→W[superscript +]bW[superscript -]b̅→ℓνbqq̅′b̅, using the full Run II data set collected by the CDF II detector, corresponding to an integrated luminosity of 8.7 fb[superscript -1]. A model-independent method simultaneously determines the fraction of longitudinal (f[subscript 0]) and right-handed (f[subscript +]) W bosons to yield f[subscript 0]=0.726±0.066(stat)±0.067(syst) and f[subscript +]=-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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