Measurement of the W boson helicity in top quark decays using 5.4 fb$$^{\boldsymbol{-1}}$$ of $$\boldsymbol{p\bar{p}}$$ collision data
We present a measurement of the helicity of the W boson produced in top quark decays using t{bar t} decays in the {ell}+jets and dilepton final states selected from a sample of 5.4 fb{sup -1} of collisions recorded using the D0 detector at the Fermilab Tevatron p{bar p} collider. We measure the fractions of longitudinal and right-handed W bosons to be f{sub 0} = 0.669 {+-} 0.102 [{+-}0.078 (stat.) {+-} 0.065 (syst.)] and f{sub +} = 0.023 {+-} 0.053 [{+-}0.041 (stat.){+-}0.034 (syst.)], respectively. This result is consistent at the 98% level with the standard model. A measurement with f{sub 0} fixed to the value from the standard model yields f{sub +} = 0.010 {+-} 0.037 [{+-}0.022 (stat.) {+-} 0.030 (syst.)].
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1004303
- Report Number(s):
- FERMILAB-PUB-10-484-E; arXiv eprint number arXiv:1011.6549; TRN: US1100663
- Journal Information:
- Submitted to Phys.Rev.D, Journal Name: Submitted to Phys.Rev.D
- Country of Publication:
- United States
- Language:
- English
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