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Forward-backward asymmetry in top quark-antiquark production

Abazov, V. M. and Abbott, B. and Acharya, B. S. and Adams, M. and Adams, T. and Alexeev, G. D. and Alkhazov, G. and Alton, A. and Alverson, G. and Alves, G. A. and Aoki, M. and Arov, M. and Askew, A. and Asman, B. and Atramentov, O. and Avila, C. and BackusMayes, J. and Badaud, F. and Bagby, L. and Baldin, B. and Bandurin, D. V. and Banerjee, S. and Barberis, E. and Baringer, P. and Barreto, J. and Bartlett, J. F. and Bassler, U. and Bazterra, V. and Beale, S. and Bean, A. and Begalli, M. and Begel, M. and Belanger-Champagne, C. and Bellantoni, L. and Beri, S. B. and Bernardi, G. and Bernhard, R. and Bertram, I. and Besancon, M. and Beuselinck, R. and Bezzubov, V. A. and Bhat, P. C. and Bhatnagar, V. and Blazey, G. and Blessing, S. and Bloom, K. and Boehnlein, A. and Boline, D. and Boos, E. E. and Borissov, G. and Bose, T. and Brandt, A. and Brandt, O. and Brock, R. and Brooijmans, G. and Bross, A. and Brown, D. and Brown, J. and Bu, X. B. and Buehler, M. and Buescher, V. and Bunichev, V. and Burdin, S. and Burnett, T. H. and Buszello, C. P. and Calpas, B. and Camacho-Perez, E. and Carrasco-Lizarraga, M. A. and Casey, B. C. K. and Castilla-Valdez, H. and Chakrabarti, S. and Chakraborty, D. and Chan, K. M. and Chandra, A. and Chen, G. and Chevalier-Thery, S. and Cho, D. K. and Cho, S. W. and Choi, S. and Choudhary, B. and Cihangir, S. and Claes, D. and Clutter, J. and Cooke, M. and Cooper, W. E. and Corcoran, M. and Couderc, F. and Cousinou, M. -C. and Croc, A. and Cutts, D. and Das, A. and Davies, G. and De, K. and de Jong, S. J. and De La Cruz-Burelo, E. and Deliot, F. and Demarteau, M. and Demina, R. and Denisov, D. and Denisov, S. P. and Desai, S. and Deterre, C. and DeVaughan, K. and Diehl, H. T. and Diesburg, M. and Ding, P. F. and Dominguez, A. and Dorland, T. and Dubey, A. and Dudko, L. V. and Duggan, D. and Duperrin, A. and Dutt, S. and Dyshkant, A. and Eads, M. and Edmunds, D. and Ellison, J. and Elvira, V. D. and Enari, Y. and Evans, H. and Evdokimov, A. and Evdokimov, V. N. and Facini, G. and Ferbel, T. and Fiedler, F. and Filthaut, F. and Fisher, W. and Fisk, H. E. and Fortner, M. and Fox, H. and Fuess, S. and Garcia-Bellido, A. and Gavrilov, V. and Gay, P. and Geng, W. and Gerbaudo, D. and Gerber, C. E. and Gershtein, Y. and Ginther, G. and Golovanov, G. and Goussiou, A. and Grannis, P. D. and Greder, S. and Greenlee, H. and Greenwood, Z. D. and Gregores, E. M. and Grenier, G. and Gris, Ph and Grivaz, J. -F. and Grohsjean, A. and Gruenendahl, S. and Gruenewald, M. W. and Guillemin, T. and Guo, F. and Gutierrez, G. and Gutierrez, P. and Haas, A. and Hagopian, S. and Haley, J. and Han, L. and Harder, K. and Harel, A. and Hauptman, J. M. and Hays, J. and Head, T. and Hebbeker, T. and Hedin, D. and Hegab, H. and Heinson, A. P. and Heintz, U. and Hensel, C. and Heredia-De La Cruz, I. and Herner, K. and Hesketh, G. and Hildreth, M. D. and Hirosky, R. and Hoang, T. and Hobbs, J. D. and Hoeneisen, B. and Hohlfeld, M. and Hubacek, Z. and Huske, N. and Hynek, V. and Iashvili, I. and Ilchenko, Y. and Illingworth, R. and Ito, A. S. and Jabeen, S. and Jaffre, M. and Jamin, D. and Jayasinghe, A. and Jesik, R. and Johns, K. and Johnson, M. and Johnston, D. and Jonckheere, A. and Jonsson, P. and Joshi, J. and Jung, A. W. and Juste, A. and Kaadze, K. and Kajfasz, E. and Karmanov, D. and Kasper, P. A. and Katsanos, I. and Kehoe, R. and Kermiche, S. and Khalatyan, N. and Khanov, A. and Kharchilava, A. and Kharzheev, Y. N. and Kirby, M. H. and Kohli, J. M. and Kozelov, A. V. and Kraus, J. and Kulikov, S. and Kumar, A. and Kupco, A. and Kurca, T. and Kuzmin, V. A. and Kvita, J. and Lammers, S. and Landsberg, G. and Lebrun, P. and Lee, H. S. and Lee, S. W. and Lee, W. M. and Lellouch, J. and Li, L. and Li, Q. Z. and Lietti, S. M. and Lim, J. K. and Lincoln, D. and Linnemann, J. and Lipaev, V. V. and Lipton, R. and Liu, Y. and Liu, Z. and Lobodenko, A. and Lokajicek, M. and de Sa, R. Lopes and Lubatti, H. J. and Luna-Garcia, R. and Lyon, A. L. and Maciel, A. K. A. and Mackin, D. and Madar, R. and Magana-Villalba, R. and Malik, S. and Malyshev, V. L. and Maravin, Y. and Martinez-Ortega, J. and McCarthy, R. and McGivern, C. L. and Meijer, M. M. and Melnitchouk, A. and Menezes, D. and Mercadante, P. G. and Merkin, M. and Meyer, A. and Meyer, J. and Miconi, F. and Mondal, N. K. and Muanza, G. S. and Mulhearn, M. and Nagy, E. and Naimuddin, M. and Narain, M. and Nayyar, R. and Neal, H. A. and Negret, J. P. and Neustroev, P. and Novaes, S. F. and Nunnemann, T. and Obrant, G. and Orbaker, D. and Orduna, J. and Osman, N. and Osta, J. and otero garzon, G. J. and Padilla, M. and Pal, A. and Parashar, N. and Parihar, V. and Park, S. K. and Parsons, J. and Partridge, R. and Parua, N. and Patwa, A. and Penning, B. and Perfilov, M. and Peters, K. and Peters, Y. and Petridis, K. and Petrillo, G. and Petroff, P. and Piegaia, R. and Pleier, M. -A. and Podesta-Lerma, P. L. M. and Podstavkov, V. M. and Polozov, P. and Popov, A. V. and Prewitt, M. and Price, D. and Prokopenko, N. and Protopopescu, S. and Qian, J. and Quadt, A. and Quinn, B. and Rangel, M. S. and Ranjan, K. and Ratoff, P. N. and Razumov, I. and Renkel, P. and Rijssenbeek, M. and Ripp-Baudot, I. and Rizatdinova, F. and Rominsky, M. and Ross, A. and Royon, C. and Rubinov, P. and Ruchti, R. and Safronov, G. and Sajot, G. and Salcido, P. and Sanchez-Hernandez, A. and Sanders, M. P. and Sanghi, B. and Santos, A. S. and Savage, G. and Sawyer, L. and Scanlon, T. and Schamberger, R. D. and Scheglov, Y. and Schellman, H. and Schliephake, T. and Schlobohm, S. and Schwanenberger, C. and Schwienhorst, R. and Sekaric, J. and Severini, H. and Shabalina, E. and Shary, V. and Shchukin, A. A. and Shivpuri, R. K. and Simak, V. and Sirotenko, V. and Skubic, P. and Slattery, P. and Smirnov, D. and Smith, K. J. and Snow, G. R. and Snow, J. and Snyder, S. and Ldner-Rembold, S. So and Sonnenschein, L. and Soustruznik, K. and Stark, J. and Stolin, V. and Stoyanova, D. A. and Strauss, M. and Strom, D. and Stutte, L. and Suter, L. and Svoisky, P. and Takahashi, M. and Tanasijczuk, A. and Taylor, W. and Titov, M. and Tokmenin, V. V. and Tsai, Y. -T. and Tsybychev, D. and Tuchming, B. and Tully, C. and Uvarov, L. and Uvarov, S. and Uzunyan, S. and Van Kooten, R. and van Leeuwen, W. M. and Varelas, N. and Varnes, E. W. and Vasilyev, I. A. and Verdier, P. and Vertogradov, L. S. and Verzocchi, M. and Vesterinen, M. and Vilanova, D. and Vokac, P. and Wahl, H. D. and Wang, M. H. L. S. and Warchol, J. and Watts, G. and Wayne, M. and Weber, M. and Welty-Rieger, L. and White, A. and Wicke, D. and Williams, M. R. J. and Wilson, G. W. and Wobisch, M. and Wood, D. R. and Wyatt, T. R. and Xie, Y. and Xu, C. and Yacoob, S. and Yamada, R. and Yang, W. -C. and Yasuda, T. and Yatsunenko, Y. A. and Ye, Z. and Yin, H. and Yip, K. and Youn, S. W. and Yu, J. and Zelitch, S. and Zhao, T. and Zhou, B. and Zhu, J. and Zielinski, M. and Zieminska, D. and Zivkovic, L. and , D0 Collaboration (2011) Forward-backward asymmetry in top quark-antiquark production. Physical Review D, 84 (11). -. ISSN 1550-7998

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    Abstract

    We present a measurement of forward-backward asymmetry in top quark-antiquark production in proton-antiproton collisions in the final state containing a lepton and at least four jets. Using a data set corresponding to an integrated luminosity of 5.4 fb(-1), collected by the D0 experiment at the Fermilab Tevatron Collider, we measure the t (t) over bar forward-backward asymmetry to be (9.2 +/- 3.7)% at the reconstruction level. When corrected for detector acceptance and resolution, the asymmetry is found to be (19.6 +/- 6.5)%. We also measure a corrected asymmetry based on the lepton from a top quark decay, found to be (15.2 +/- 4.0)%. The results are compared to predictions based on the next-to-leading-order QCD generator MC@NLO. The sensitivity of the measured and predicted asymmetries to the modeling of gluon radiation is discussed.

    Item Type: Article
    Journal or Publication Title: Physical Review D
    Additional Information: © 2011 American Physical Society
    Subjects: Q Science > QC Physics
    Departments: Faculty of Science and Technology > Physics
    Faculty of Science and Technology > Psychology
    ID Code: 54520
    Deposited By: ep_importer_pure
    Deposited On: 24 May 2012 14:14
    Refereed?: Yes
    Published?: Published
    Last Modified: 09 Apr 2014 23:30
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/54520

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