Combination of CDF and D0 measurements of the W boson helicity in top
quark decays
ArXiv 1202.5272 (2012)
Authors:
CDF The, D0 Collaborations, T Aaltonen, VM Abazov, B Abbott, BS Acharya, M Adams, T Adams, GD Alexeev, G Alkhazov, A Alton, B Álvarez González, G Alverson, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, M Aoki, G Apollinari, JA Appel, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, A Askew, B Åsman, S Atkins, O Atramentov, B Auerbach, K Augsten, A Aurisano, C Avila, F Azfar, F Badaud, W Badgett, T Bae, L Bagby, B Baldin, DV Bandurin, S Banerjee, A Barbaro-Galtieri, E Barberis, P Baringer, VE Barnes, BA Barnett, J Barreto, P Barria, JF 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, SB Beri, G Bernardi, R Bernhard, I Bertram, M Besançon, R Beuselinck, VA Bezzubov, S Bhatia, V Bhatnagar, A Bhatti, PC Bhat, D Bisello, I Bizjak, KR Bland, G Blazey, S Blessing, K Bloom, B Blumenfeld, A Bocci, A Bodek, A Boehnlein, D Boline, EE 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, XB Bu, J Budagov, HS Budd, M Buehler, V Buescher, V Bunichev, S Burdin, K Burkett, P Bussey, CP Buszello, A Buzatu, A Calamba, C Calancha, E Camacho-Pérez, S Camarda, M Campanelli, M Campbell, F Canelli, B Carls, D Carlsmith, R Carosi, S Carrillo, S Carron, B Casal, M Casarsa, BCK Casey, H Castilla-Valdez, A Castro, P Catastini, S Caughron, D Cauz, V Cavaliere, M Cavalli-Sforza, A Cerri, L Cerrito, S Chakrabarti, D Chakraborty, KM Chan, A Chandra, E Chapon, YC Chen, G Chen, M Chertok, S Chevalier-Théry, G Chiarelli, G Chlachidze, F Chlebana, S Choi, D Chokheli, B Choudhary, DK Cho, K Cho, SW Cho, WH Chung, YS Chung, S Cihangir, MA Ciocci, D Claes, C Clarke, A Clark, J Clutter, G Compostella, ME Convery, J Conway, M Cooke, WE Cooper, M Corbo, M Corcoran, M Cordelli, F Couderc, M-C Cousinou, CA Cox, DJ Cox, F Crescioli, A Croc, J Cuevas, R Culbertson, D Cutts, N d'Ascenzo, M d'Errico, M D'Onofrio, D Dagenhart, A Das, M Datta, G Davies, F Déliot, M Dell'Orso, R Demina, L Demortier, M Deninno, D Denisov, SP Denisov, S Desai, C Deterre, K DeVaughan, F Devoto, P de Barbaro, SJ de Jong, E De La Cruz-Burelo, HT Diehl, M Diesburg, PF Ding, JR Dittmann, A Di Canto, B Di Ruzza, A Dominguez, S Donati, P Dong, M Dorigo, T Dorigo, T Dorland, A Dubey, LV Dudko, D Duggan, A Duperrin, S Dutt, A Dyshkant, M Eads, K Ebina, D Edmunds, A Elagin, J Ellison, VD Elvira, Y Enari, A Eppig, R Erbacher, S Errede, N Ershaidat, R Eusebi, H Evans, A Evdokimov, VN Evdokimov, G Facini, S Farrington, M Feindt, T Ferbel, L Feng, JP Fernandez, F Fiedler, R Field, F Filthaut, W Fisher, HE Fisk, G Flanagan, R Forrest, M Fortner, H Fox, M Franklin, MJ Frank, JC Freeman, S Fuess, Y Funakoshi, I Furic, M Gallinaro, JE Garcia, A Garcia-Bellido, GA García-Guerra, AF Garfinkel, P Garosi, V Gavrilov, P Gay, W Geng, D Gerbaudo, CE Gerber, H Gerberich, E Gerchtein, Y Gershtein, S Giagu, V Giakoumopoulou, P Giannetti, K Gibson, CM Ginsburg, G Ginther, N Giokaris, P Giromini, G Giurgiu, V Glagolev, D Glenzinski, D Goldin, M Gold, N Goldschmidt, A Golossanov, G Golovanov, G Gomez-Ceballos, G Gomez, M Goncharov, O González, I Gorelov, AT Goshaw, K Goulianos, A Goussiou, PD Grannis, S Greder, H Greenlee, G Grenier, S Grinstein, Ph Gris, J-F Grivaz, A Grohsjean, C Grosso-Pilcher, RC Group, S Grünendahl, MW Grünewald, T Guillemin, J Guimaraes da Costa, F Guo, G Gutierrez, P Gutierrez, A Haas, S Hagopian, SR Hahn, J Haley, E Halkiadakis, A Hamaguchi, JY Han, L Han, F Happacher, K Hara, K Harder, D Hare, M Hare, A Harel, RF Harr, K Hatakeyama, JM Hauptman, C Hays, J Hays, T Head, T Hebbeker, M Heck, D Hedin, H Hegab, J Heinrich, AP Heinson, U Heintz, C Hensel, I Heredia-De La Cruz, M Herndon, K Herner, G Hesketh, S Hewamanage, MD Hildreth, R Hirosky, T Hoang, JD Hobbs, A Hocker, B Hoeneisen, M Hohlfeld, W Hopkins, D Horn, S Hou, I Howley, Z Hubacek, RE Hughes, M Hurwitz, U Husemann, N Hussain, M Hussein, J Huston, V Hynek, I Iashvili, Y Ilchenko, R Illingworth, G Introzzi, M Iori, AS Ito, A Ivanov, S Jabeen, M Jaffré, E James, D Jamin, D Jang, A Jayasinghe, B Jayatilaka, EJ Jeon, R Jesik, S Jindariani, K Johns, M Johnson, A Jonckheere, M Jones, P Jonsson, KK Joo, J Joshi, SY Jun, AW Jung, TR Junk, A Juste, K Kaadze, E Kajfasz, T Kamon, PE Karchin, D Karmanov, A Kasmi, PA Kasper, Y Kato, I Katsanos, R Kehoe, S Kermiche, W Ketchum, J Keung, N Khalatyan, A Khanov, A Kharchilava, YN Kharzheev, V Khotilovich, B Kilminster, N Kimura, DH Kim, HS Kim, JE Kim, MJ Kim, SB Kim, SH Kim, YJ Kim, YK Kim, S Klimenko, K Knoepfel, JM Kohli, K Kondo, DJ Kong, J Konigsberg, AV Kotwal, AV Kozelov, J Kraus, M Kreps, J Kroll, D Krop, M Kruse, V Krutelyov, T Kuhr, S Kulikov, A Kumar, A Kupco, M Kurata, T Kurča, VA Kuzmin, S Kwang, AT Laasanen, S Lami, S Lammel, S Lammers, M Lancaster, RL Lander, G Landsberg, K Lannon, A Lath, G Latino, P Lebrun, T LeCompte, E Lee, HS Lee, HS Lee, JS Lee, WM Lee, SW Lee, SW Lee, J Lellouch, S Leo, S Leone, JD Lewis, H Li, L Li, QZ Li, JK Lim, A Limosani, C-J Lin, D Lincoln, M Lindgren, J Linnemann, VV Lipaev, E Lipeles, R Lipton, A Lister, DO Litvintsev, C Liu, H Liu, H Liu, T Liu, Q Liu, Y Liu, A Lobodenko, S Lockwitz, A Loginov, M Lokajicek, R Lopes de Sa, HJ Lubatti, D Lucchesi, J Lueck, P Lujan, P Lukens, R Luna-Garcia, G Lungu, AL Lyon, R Lysak, J Lys, AKA Maciel, D Mackin, R Madar, R Madrak, K Maeshima, P Maestro, R Magaña-Villalba, S Malik, S Malik, VL Malyshev, G Manca, A Manousakis-Katsikakis, Y Maravin, F Margaroli, C Marino, M Martínez, J Martínez-Ortega, P Mastrandrea, K Matera, ME Mattson, A Mazzacane, P Mazzanti, R McCarthy, KS McFarland, CL McGivern, P McIntyre, R McNulty, A Mehta, P Mehtala, MM Meijer, A Melnitchouk, D Menezes, PG Mercadante, M Merkin, C Mesropian, A Meyer, J Meyer, T Miao, F Miconi, D Mietlicki, A Mitra, H Miyake, S Moed, N Moggi, NK Mondal, MN Mondragon, CS Moon, R Moore, MJ Morello, J Morlock, P Movilla Fernandez, A Mukherjee, M Mulhearn, Th Muller, P Murat, M Mussini, J Nachtman, Y Nagai, J Naganoma, E Nagy, M Naimuddin, I Nakano, A Napier, M Narain, R Nayyar, HA Neal, JP Negret, J Nett, MS Neubauer, P Neustroev, C Neu, J Nielsen, L Nodulman, SY Noh, O Norniella, T Nunnemann, L Oakes, G Obrant, SH Oh, YD Oh, I Oksuzian, T Okusawa, R Orava, J Orduna, L Ortolan, N Osman, J Osta, M Padilla, S Pagan Griso, C Pagliarone, A Pal, E Palencia, V Papadimitriou, AA Paramonov, N Parashar, V Parihar, SK Park, R Partridge, N Parua, J Patrick, A Patwa, G Pauletta, M Paulini, C Paus, DE Pellett, B Penning, A Penzo, M Perfilov, Y Peters, K Petridis, G Petrillo, P Pétroff, TJ Phillips, G Piacentino, E Pianori, J Pilot, K Pitts, C Plager, M-A Pleier, PLM Podesta-Lerma, VM Podstavkov, P Polozov, L Pondrom, AV Popov, S Poprocki, K Potamianos, M Prewitt, D Price, N Prokopenko, F Prokoshin, A Pranko, F Ptohos, G Punzi, J Qian, A Quadt, B Quinn, A Rahaman, V Ramakrishnan, MS Rangel, K Ranjan, N Ranjan, PN Ratoff, I Razumov, I Redondo, P Renkel, P Renton, M Rescigno, T Riddick, F Rimondi, I Ripp-Baudot, L Ristori, F Rizatdinova, A Robson, T Rodrigo, T Rodriguez, E Rogers, S Rolli, M Rominsky, R Roser, A Ross, C Royon, P Rubinov, R Ruchti, F Ruffini, A Ruiz, J Russ, V Rusu, A Safonov, G Safronov, G Sajot, WK Sakumoto, Y Sakurai, P Salcido, A Sánchez-Hernández, MP Sanders, B Sanghi, L Santi, AS Santos, K Sato, G Savage, V Saveliev, A Savoy-Navarro, L Sawyer, T Scanlon, RD Schamberger, Y Scheglov, H Schellman, P Schlabach, S Schlobohm, A Schmidt, EE Schmidt, C Schwanenberger, T Schwarz, R Schwienhorst, L Scodellaro, A Scribano, F Scuri, S Seidel, Y Seiya, J Sekaric, A Semenov, H Severini, F Sforza, E Shabalina, SZ Shalhout, V Shary, S Shaw, AA Shchukin, T Shears, PF Shepard, M Shimojima, RK Shivpuri, M Shochet, I Shreyber-Tecker, V Simak, A Simonenko, P Sinervo, P Skubic, P Slattery, K Sliwa, D Smirnov, JR Smith, KJ Smith, FD Snider, GR Snow, J Snow, S Snyder, A Soha, S Söldner-Rembold, H Song, L Sonnenschein, V Sorin, K Soustruznik, P Squillacioti, R St Denis, M Stancari, J Stark, B Stelzer, O Stelzer-Chilton, D Stentz, V Stolin, DA Stoyanova, M Strauss, J Strologas, GL Strycker, L Stutte, Y Sudo, A Sukhanov, I Suslov, L Suter, P Svoisky, M Takahashi, K Takemasa, Y Takeuchi, J Tang, M Tecchio, PK Teng, J Thom, J Thome, GA Thompson, E Thomson, M Titov, D Toback, S Tokar, VV Tokmenin, K Tollefson, T Tomura, D Tonelli, D Torretta, S Torre, P Totaro, M Trovato, Y-T Tsai, K Tschann-Grimm, D Tsybychev, B Tuchming, C Tully, F Ukegawa, S Uozumi, L Uvarov, S Uvarov, S Uzunyan, R Van Kooten, WM van Leeuwen, N Varelas, A Varganov, EW Varnes, IA Vasilyev, F Vázquez, G Velev, C Vellidis, P Verdier, AY Verkheev, LS Vertogradov, M Verzocchi, M Vesterinen, M Vidal, I Vila, D Vilanova, R Vilar, J Vizán, M Vogel, P Vokac, G Volpi, P Wagner, RL Wagner, HD Wahl, T Wakisaka, R Wallny, MHLS Wang, SM Wang, A Warburton, J Warchol, D Waters, G Watts, M Wayne, J Weichert, L Welty-Rieger, WC Wester III, A White, D Whiteson, F Wick, D Wicke, AB Wicklund, E Wicklund, S Wilbur, HH Williams, MRJ Williams, GW Wilson, JS Wilson, P Wilson, BL Winer, P Wittich, M Wobisch, S Wolbers, H Wolfe, DR Wood, T Wright, X Wu, Z Wu, TR Wyatt, Y Xie, R Yamada, K Yamamoto, T Yang, UK Yang, W-C Yang, YC Yang, W-M Yao, T Yasuda, YA Yatsunenko, Z Ye, GP Yeh, K Yi, H Yin, K Yip, J Yoh, K Yorita, T Yoshida, SW Youn, I Yu, GB Yu, SS Yu, JC Yun, A Zanetti, Y Zeng, T Zhao, B Zhou, J Zhu, M Zielinski, D Zieminska, L Zivkovic, S Zucchelli
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 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.
