@article{3153258,
    title = "Combination of CDF and D0 measurements of the W boson helicity in top
quark decays",
    author = "Aaltonen, T. and Abazov, V. M. and Abbott, B. and Acharya, B. S. and and Adams, M. and Adams, T. and Alexeev, G. D. and Alkhazov, G. and Alton, and A. and Alvarez Gonzalez, B. and Alverson, G. and Amerio, S. and Amidei, and D. and Anastassov, A. and Annovi, A. and Antos, J. and Aoki, M. and and Apollinari, G. and Appel, J. A. and Arisawa, T. and Artikov, A. and and Asaadi, J. and Ashmanskas, W. and Askew, A. and Asman, B. and Atkins, S. and and Atramentov, O. and Auerbach, B. and Augsten, K. and Aurisano, A. and and Avila, C. and Azfar, F. and Badaud, F. and Badgett, W. and Bae, T. and and Bagby, L. and Baldin, B. and Bandurin, D. V. and Banerjee, S. and and Barbaro-Galtieri, A. and Barberis, E. and Baringer, P. and Barnes, V. E. and and Barnett, B. A. and Barreto, J. and Barria, P. and Bartlett, J. F. and and Bartos, P. and Bassler, U. and Bauce, M. and Bazterra, V. and Bean, and A. and Bedeschi, F. and Begalli, M. and Behari, S. and and Belanger-Champagne, C. and Bellantoni, L. and Bellettini, G. and and Bellinger, J. and Benjamin, D. and Beretvas, A. and Beri, S. B. and and Bernardi, G. and Bernhard, R. and Bertram, I. and Besancon, M. and and Beuselinck, R. and Bezzubov, V. A. and Bhatia, S. and Bhatnagar, V. and and Bhatti, A. and Bhat, P. C. and Bisello, D. and Bizjak, I. and Bland, K. and R. and Blazey, G. and Blessing, S. and Bloom, K. and Blumenfeld, B. and and Bocci, A. and Bodek, A. and Boehnlein, A. and Boline, D. and Boos, E. E. and and Borissov, G. and Bortoletto, D. and Bose, T. and Boudreau, J. and and Boveia, A. and Brandt, A. and Brandt, O. and Brigliadori, L. and Brock, and R. and Bromberg, C. and Brooijmans, G. and Bross, A. and Brown, D. and and Brown, J. and Brucken, E. and Bu, X. B. and Budagov, J. and Budd, H. S. and and Buehler, M. and Buescher, V. and Bunichev, V. and Burdin, S. and and Burkett, K. and Bussey, P. and Buszello, C. P. and Buzatu, A. and and Calamba, A. and Calancha, C. and Camacho-Perez, E. and Camarda, S. and and Campanelli, M. and Campbell, M. and Canelli, F. and Carls, B. and and Carlsmith, D. and Carosi, R. and Carrillo, S. and Carron, S. and Casal, and B. and Casarsa, M. and Casey, B. C. K. and Castilla-Valdez, H. and and Castro, A. and Catastini, P. and Caughron, S. and Cauz, D. and and Cavaliere, V. and Cavalli-Sforza, M. and Cerri, A. and Cerrito, L. and and Chakrabarti, S. and Chakraborty, D. and Chan, K. M. and Chandra, A. and and Chapon, E. and Chen, Y. C. and Chen, G. and Chertok, M. and and Chevalier-Thery, S. and Chiarelli, G. and Chlachidze, G. and Chlebana, and F. and Choi, S. and Chokheli, D. and Choudhary, B. and Cho, D. K. and and Cho, K. and Cho, S. W. and Chung, W. H. and Chung, Y. S. and Cihangir, and S. and Ciocci, M. 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P. and Yi, K. and Yin, H. and and Yip, K. and Yoh, J. and Yorita, K. and Yoshida, T. and Youn, S. W. and and Yu, I. and Yu, G. B. and Yu, S. S. and Yun, J. C. and Zanetti, A. and and Zeng, Y. and Zhao, T. and Zhou, B. and Zhu, J. and Zielinski, M. and and Zieminska, D. and Zivkovic, L. and Zucchelli, S. and CDF Collaboration and and D0 Collaboration",
    journal = "Physical Review D",
    year = "2012",
    volume = "85",
    number = "7",
    publisher = "AMER PHYSICAL SOC",
    issn = "2470-0010, 2470-0029",
    doi = "10.1103/PhysRevD.85.071106",
    abstract = "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 p (p) over bar collisions collected during Run II of the Fermilab
Tevatron collider. Combining measurements that simultaneously determine
the fractions of W bosons with longitudinal (f(0)) and right-handed
(f(+)) helicities, we find f(0) = 0.722 +/- 0.081[+/- 0.062(stat) +/-
0.052(syst)] and f(+) = -0.033 +/- 0.046[+/- 0.034(stat) +/-
0.031(syst)]. Combining measurements where one of the helicity fractions
is fixed to the value expected in the standard model, we find f(0) =
0.682 +/- 0.057[+/- 0.035(stat) +/- 0.046(syst)] for fixed f(+) and
f(+) = -0.015 +/- 0.035[+/- 0.018(stat) +/- 0.030(syst)] for fixed
f(0). The results are consistent with standard model expectations."
}