期刊
PHYSICAL REVIEW D
卷 73, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.73.111103
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资金
- STFC [PP/E000452/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/E000452/1, PP/E000444/1, PPA/A/S/2003/00461/2] Funding Source: researchfish
We measure the branching fraction of the top quark to longitudinally and right-handed polarized W bosons, F-0 and F+, using approximately 200 pb(-1) of (p) over barp collisions collected by the CDF II detector. We analyze two quantities sensitive to the W helicity: the invariant mass of the charged lepton and the bottom-quark jet in the decay t -> Wb ->center dot nu b (where center dot=e or mu), and the transverse momentum of the charged lepton. Constrained fits yield F-0=0.74(-0.34)(+0.22), and F+< 0.27 at the 95% confidence level. These measurements are consistent with the standard model predictions.
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