Combination of CDF and D0 measurements of the W boson helicity in top quark decays
Creators: name: CDF, The
name: Collaborations, D0
name: :
name: Aaltonen, T.
name: Abazov, V. M.
name: Abbott, B.
name: Acharya, B. S.
name: Adams, M.
name: Adams, T.
name: Alexeev, G. D.
name: Alkhazov, G.
name: Alton, A.
name: González, B. Álvarez
name: Alverson, G.
name: Amerio, S.
name: Amidei, D.
name: Anastassov, A.
name: Annovi, A.
name: Antos, J.
name: Aoki, M.
name: Apollinari, G.
name: Appel, J. A.
name: Arisawa, T.
name: Artikov, A.
name: Asaadi, J.
name: Ashmanskas, W.
name: Askew, A.
name: Åsman, B.
name: Atkins, S.
name: Atramentov, O.
name: Auerbach, B.
name: Augsten, K.
name: Aurisano, A.
name: Avila, C.
name: Azfar, F.
name: Badaud, F.
name: Badgett, W.
name: Bae, T.
name: Bagby, L.
name: Baldin, B.
name: Bandurin, D. V.
name: Banerjee, S.
name: Barbaro-Galtieri, A.
name: Barberis, E.
name: Baringer, P.
name: Barnes, V. E.
name: Barnett, B. A.
name: Barreto, J.
name: Barria, P.
name: Bartlett, J. F.
name: Bartos, P.
name: Bassler, U.
name: Bauce, M.
name: Bazterra, V.
name: Bean, A.
name: Bedeschi, F.
name: Begalli, M.
name: Behari, S.
name: Belanger-Champagne, C.
name: Bellantoni, L.
name: Bellettini, G.
name: Bellinger, J.
name: Benjamin, D.
name: Beretvas, A.
name: Beri, S. B.
name: Bernardi, G.
name: Bernhard, R.
name: Bertram, I.
name: Besançon, M.
name: Beuselinck, R.
name: Bezzubov, V. A.
name: Bhatia, S.
name: Bhatnagar, V.
name: Bhatti, A.
name: Bhat, P. C.
name: Bisello, D.
name: Bizjak, I.
name: Bland, K. R.
name: Blazey, G.
name: Blessing, S.
name: Bloom, K.
name: Blumenfeld, B.
name: Bocci, A.
name: Bodek, A.
name: Boehnlein, A.
name: Boline, D.
name: Boos, E. E.
name: Borissov, G.
name: Bortoletto, D.
name: Bose, T.
name: Boudreau, J.
name: Boveia, A.
name: Brandt, A.
name: Brandt, O.
name: Brigliadori, L.
name: Brock, R.
name: Bromberg, C.
name: Brooijmans, G.
name: Bross, A.
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name: Wicklund, E.
name: Wilbur, S.
name: Williams, H. H.
name: Williams, M. R. J.
name: Wilson, G. W.
name: Wilson, J. S.
name: Wilson, P.
name: Winer, B. L.
name: Wittich, P.
name: Wobisch, M.
name: Wolbers, S.
name: Wolfe, H.
name: Wood, D. R.
name: Wright, T.
name: Wu, X.
name: Wu, Z.
name: Wyatt, T. R.
name: Xie, Y.
name: Yamada, R.
name: Yamamoto, K.
name: Yang, T.
name: Yang, U. K.
name: Yang, W. -C.
name: Yang, Y. C.
name: Yao, W. -M.
name: Yasuda, T.
name: Yatsunenko, Y. A.
name: Ye, Z.
name: Yeh, G. P.
name: Yi, K.
name: Yin, H.
name: Yip, K.
name: Yoh, J.
name: Yorita, K.
name: Yoshida, T.
name: Youn, S. W.
name: Yu, I.
name: Yu, G. B.
name: Yu, S. S.
name: Yun, J. C.
name: Zanetti, A.
name: Zeng, Y.
name: Zhao, T.
name: Zhou, B.
name: Zhu, J.
name: Zielinski, M.
name: Zieminska, D.
name: Zivkovic, L.
name: Zucchelli, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report the combination of recent measurements of the helicity of the W boson from top quark decay by the CDF and D0 collaborations, based on data samples corresponding to integrated luminosities of 2.7 - 5.4 fb^-1 of ppbar collisions collected during Run II of the Fermilab Tevatron Collider. Combining measurements that simultaneously determine the fractions of W bosons with longitudinal (f0) and right-handed (f+) helicities, we find f0 = 0.722 \pm 0.081 [\pm 0.062 (stat.) \pm 0.052 (syst.)] and f+ = -0.033 \pm 0.046 [\pm 0.034 (stat.) \pm 0.031 (syst.)]. Combining measurements where one of the helicity fractions is fixed to the value expected in the standard model, we find f0 = 0.682 \pm 0.057 [\pm 0.035 (stat.) \pm 0.046 (syst.)] and f+ = -0.015\pm0.035 [\pm 0.018 (stat.) \pm 0.030 (syst.)]. The results are consistent with standard model expectations.
description: 11 pages, 1 figure, to be submitted to Phys. Rev D Rap. Comm