{"paper":{"title":"Measurement of the W boson helicity in top quark decays using 5.4 fb^-1 of ppbar collision data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Altona, A.A. Shchukin, A. Askew, A. Bean, A. Boehnlein, A. Brandt, A. Bross, A. Chandra, A. Croc, A. Das, A. Dominguez, A. Dubey, A. Duperrin, A. Dyshkant, A. Evdokimov, A. Garcia-Bellido, A. Goussiou, A. Grohsjean, A. Haasc, A. Harel, A. Jonckheere, A. Juste, A.K.A. Maciel, A. Khanov, A. Kharchilava, A. Kumar, A. Kupco, A.L. Lyon, A. Lobodenko, A. Melnitchouk, A. Meyer, A. Patwa, A.P. Heinson, A. Quadt, A. Sanchez-Hernandez, A.S. Ito, A. Sopczak, A.S. Santos, A. Tanasijczuk, A.V. Kozelov, A.V. Popov, A. White, B. Abbott, B.Asman, B. Baldin, B. Calpas, B. Choudhary, B.C.K. Casey, B. Hoeneisen, B. Penning, B. Quinn, B.S. Acharya, B. Sanghi, B. Spurlock, B. Tuchming, B. Zhou, C. Avila, C. Belanger-Champagne, C.E. Gerber, C. Hensel, C.L. McGivern, C.P. Buszello, C. Royon, C. Schwanenberger, C. Tully, C. Xu, D.A. Stoyanova, D. Boline, D. Brown, D. Chakraborty, D. Claes, D. Cutts, D. Denisov, D. Duggan, D. Edmunds, D. Gerbaudo, D. Hedin, D. Jamin, D. Johnston, D. Karmanov, D.K. Cho, D. Khatidze, D. Lincoln, D. Mackin, D. Menezes, D. Price, D.R. Wood, D. Smirnov, D. Strom, D. Tsybychev, D.V. Bandurin, D. Vilanova, D. Wicke, D. Zieminska, E. Barberis, E. Camacho-Perez, E. De La Cruz-Burelo, E.E. Boos, E. Kajfasz, E.M. Gregores, E. Nagy, E. Shabalina, E.W. Varnes, F. Badaud, F. Couderc, F. Deliot, F. Fiedler, F. Filthaut, F. Guo, F. Rizatdinova, G.A. Alves, G. Alkhazov, G. Alverson, G. Bernardi, G. Blazey, G. Borissov, G. Brooijmans, G. Chen, G.D. Alexeev, G. Davies, G. Facini, G. Ginther, G. Golovanov, G. Grenier, G. Gutierrez, G. Hesketh, G.J. Otero y Garzon, G. Landsberg, G. Obrant, G. Petrillo, G.R. Snow, G. Safronov, G. Sajot, G. Savage, G.S. Muanza, G. Watts, G.W. Wilson, H.A. Neal, H. Castilla-Valdez, H.D. Wahl, H.E. Fisk, H. Evans, H. Fox, H. Greenlee, H. Hegab, H.J. Lubatti, H. Schellman, H. Severini, H.S. Lee, H.T. Diehl, H. Yin, I.A. Vasilyev, I. Bertram, I. Heredia-De La Cruz, I. Iashvili, I. Katsanos, I. Razumov, I. Ripp-Baudot, J. BackusMayes, J. Barreto, J. Brown, J. Clutter, J.D. Hobbs, J. Ellison, J.F. Bartlett, J.-F. Grivaz, J. Haley, J. Hays, J. Joshi, J.K. Lim, J. Kraus, J. Kvita, J. Lellouch, J. Linnemann, J. Martinez-Ortega, J. Meyer, J.M. Hauptman, J.M. Kohli, J. Orduna, J. Osta, J. Parsons, J. Piper, J.P. Negret, J. Qian, J. Sekaric, J. Snow, J. Stark, J. Warchol, J. Yu, J. Zhu, K. Bloom, K. De, K. DeVaughan, K. Harder, K. Herner, K. Johns, K.J. Smith, K. Kaadze, K.M. Chan, K. Peters, K. Ranjan, K. Soustruznik, K. Yip, L. Bagby, L. Bellantoni, L. Han, L. Li, L.S. Ancu, L. Sawyer, L. Sonnenschein, L. Stutte, L. Suter, L.S. Vertogradov, L. Uvarov, L.V. Dudko, L. Welty-Rieger, L. Zivkovic, M.A. Carrasco-Lizarraga, M. Adams, M. Aoki, M.-A. Pleier, M. Arov, M. Begalli, M. Begel, M. Besancon, M. Buehler, M.-C. Cousinou, M. Cooke, M. Corcoran, M. Cwiok, M. Demarteau, M.D. Hildreth, M. Diesburg, M. Eads, M.-E. Pol, M. Fortner, M.H. Kirby, M.H.L.S. Wang, M. Hohlfeld, M. Jaffre, M. Johnson, M. Lokajicek, M. Merkin, M.M. Meijer, M. Mulhearn, M. Naimuddin, M. Narain, M. Owen, M. Padilla, M. Pangilinan, M. Perfilov, M. Prewitt, M.P. Sanders, M. Rijssenbeek, M.R.J. Williams, M. Rominsky, M. Sosebee, M.S. Rangel, M. Strauss, M. Takahashi, M. Titov, M. Verzocchi, M. Vesterinen, M. Wayne, M. Weberg, M.W. Grunewald, M. Wobisch, M. Zielinski, N. Huske, N. Khalatyan, N.K. Mondal, N. Osman, N. Parashar, N. Parua, N. Varelas, O. Atramentov, O. Brandt, P.A. Kasper, P. Baringer, P.C. Bhat, P.D. Grannis, P. Gay, P.G. Mercadante, P. Gutierrez, Ph. Gris, P. Jonsson, P. Lebrun, P.L.M. Podesta-Lerma, P. Love, P.M. Tuts, P. Neustroev, P.N. Ratoff, P. Petroff, P. Polozov, P. Renkel, P. Rich, P. Rubinov, P. Skubic, P. Slattery, P. Svoisky, P. Verdier, P. Vint, P. Vokac, Q.Z. Li, R. Bernhard, R. Beuselinck, R. Brock, R. Demina, R.D. Schamberger, R. Hirosky, R. Illingworth, R. Jesik, R. Kehoe, R.K. Shivpuri, R. Lipton, R. Luna-Garciae, R. Madar, R. Magana-Villalba, R. McCarthy, R. Nayyar, R. Partridge, R. Piegaia, R. Ruchti, R. Schwienhorst, R. Van Kooten, R. Yamada, S. Banerjee, S.B. Beri, S. Beale, S. Blessing, S. Burdinb, S. Chakrabarti, S. Chevalier-Thery, S. Choi, S. Cihangir, S. Desai, S. Dutt, S.F. Novaes, S. Fuess, S. Greder, S. Grunendahl, S. Hagopian, S. Hossain, S. Jabeen, S. Jain, S.J. De Jong, S.J. Wimpenny, S. Kermiche, S.K. Park, S. Lammers, S. Malik, S.M. Lietti, S.P. Denisov, S. Protopopescu, S. Schlobohm, S. Snyder, S. Soldner-Rembold, S. Uvarov, S. Uzunyan, S.W. Cho, S.W. Lee, S.W. Youn, S. Yacoob, S. Zelitch, T.A. Bolton, T. Adams, T. Bose, T. Christoudias, T. Dorland, T. Ferbel, T. Gadfort, T.H. Burnett, T. Head, T. Hebbeker, T. Hoang, T. Kurca, T. Nunnemann, T.R. Wyatt, T. Scanlon, T. Schliephake, T. Yasuda, T. Zhao, U. Bassler, U. Heintz, V.A. Bezzubov, V.A. Kuzmin, V. Bazterra, V. Bhatnagar, V. Buescher, V. Bunichev, V.D. Elvira, V. Gavrilov, V. Hynek, V.L. Malyshev, V.M. Abazov, V.M. Podstavkov, V.N. Evdokimov, V. Parihar, V. Shary, V. Simak, V. Sirotenko, V. Stolin, V.V. Lipaev, V.V. Tokmenin, W.-C. Yang, W.E. Cooper, W. Fisher, W. Geist, W. Geng, W.M. Lee, W.M. van Leeuwen, W. Taylor, X.B. Bu, Y. Arnoud, Y.A. Yatsunenko, Y. Enari, Y. Gershtein, Y. Liu, Y. Maravin, Y.N. Kharzheev, Y. Peters, Y. Scheglov, Y.-T. Tsai, Y. Xie, Z.D. Greenwood, Z. Hubacek, Z. Liu, Z. Ye","submitted_at":"2010-11-30T14:04:44Z","abstract_excerpt":"We present a measurement of the helicity of the W boson produced in top quark decays using ttbar decays in the l+jets and dilepton final states selected from a sample of 5.4 fb^-1 of collisions recorded using the D0 detector at the Fermilab Tevatron ppbar collider. We measure the fractions of longitudinal and right-handed W bosons to be f_0 = 0.669 +- 0.102 [ +- 0.078 (stat.) +- 0.065 (syst.)] and f_+ = 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_0 fixed to the value from the standard"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.6549","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}