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Phys Rev Lett. 2011 Aug 19;107(8):082001. doi: 10.1103/PhysRevLett.107.082001. Epub 2011 Aug 16.

Search for a fourth generation t' Quark in p ̄p collisions at √s = 1.96 TeV.

Physical review letters

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

Affiliations

  1. Joint Institute for Nuclear Research, Dubna, Russia.

PMID: 21929161 DOI: 10.1103/PhysRevLett.107.082001

Abstract

We present a search for pair production of a fourth generation t' quark and its antiparticle, followed by their decays to a W boson and a jet, based on an integrated luminosity of 5.3 fb(-1) of proton-antiproton collisions at √s = 1.96  TeV collected by the D0 Collaboration at the Fermilab Tevatron Collider. We set upper limits on the t' ̄t' production cross section that exclude at the 95% C.L. a t' quark that decays exclusively to W+jet with a mass below 285 GeV. We observe a small excess in the μ+jets channel which reduces the mass range excluded compared to the expected limit of 320 GeV in the absence of a signal.

© 2011 American Physical Society

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