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Combination of CDF and D0 measurements of the W boson helicity in top quark decays

  • T. Aaltonen
  • , V. M. Abazov
  • , B. Abbott
  • , B. S. Acharya
  • , M. Adams
  • , T. Adams
  • , G. D. Alexeev
  • , G. Alkhazov
  • , A. Alton
  • , B. Alvarez González
  • , G. Alverson
  • , S. Amerio
  • , D. Amidei
  • , A. Anastassov
  • , A. Annovi
  • , J. Antos
  • , M. Aoki
  • , G. Apollinari
  • , J. A. Appel
  • , T. Arisawa
  • A. Artikov, J. Asaadi, W. Ashmanskas, A. Askew, B. Asman, S. Atkins, O. Atramentov, B. Auerbach, K. Augsten, A. Aurisano, C. Avila, F. Azfar, F. Badaud, W. Badgett, T. Bae, L. Bagby, B. Baldin, D. V. Bandurin, S. Banerjee, A. Barbaro-Galtieri, E. Barberis, P. Baringer, V. E. Barnes, B. A. Barnett, J. Barreto, P. Barria, J. F. Bartlett, P. Bartos, U. Bassler, M. Bauce, V. Bazterra, A. Bean, F. Bedeschi, M. Begalli, S. Behari, C. Belanger-Champagne, L. Bellantoni, G. Bellettini, J. Bellinger, D. Benjamin, A. Beretvas, S. B. Beri, G. Bernardi, R. Bernhard, I. Bertram, M. Besançon, R. Beuselinck, V. A. Bezzubov, S. Bhatia, V. Bhatnagar, A. Bhatti, P. C. Bhat, D. Bisello, I. Bizjak, K. R. Bland, G. Blazey, S. Blessing, K. Bloom, B. Blumenfeld, A. Bocci, A. Bodek, A. Boehnlein, D. Boline, E. E. Boos, G. Borissov, D. Bortoletto, T. Bose, J. Boudreau, A. Boveia, A. Brandt, O. Brandt, L. Brigliadori, R. Brock, C. Bromberg, G. Brooijmans, A. Bross, D. Brown, J. Brown, E. Brucken, X. B. 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Résultats de recherche: Contribution à un journalArticleRevue par des pairs

50 Citations (Scopus)

Résumé

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 2.7-5.4fb -1 of pp̄ 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.

langue originaleAnglais
Numéro d'article071106
journalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume85
Numéro de publication7
Les DOIs
étatPublié - 27 avr. 2012
Modification externeOui

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