Abazov, V. M.Abbott, B.Acharya, B. S.Adams, M.Adams, T.Alexeev, G. D.Alkhazov, G.Alton, A.Alverson, G.Alves, G. A.Aoki, M.Zielinski, M.Ferbel, T.Sanghi, B.Zieminska, D.Zivkovic, L.Linnemann, J.Bhatnagar, V.Mulhearn, M.Claes, D.Shchukin, A. A.Strauss, M.Mondal, N. K.Jung, A. W.Blazey, G.Blessing, S.Bloom, K.Boehnlein, A.Boline, D.Lipaev, V. V.Eads, M.Boos, E. E.Bernhard, R.Kehoe, R.Borissov, G.Fiedler, F.Harel, A.Clutter, J.Bose, T.Nagy, E.Brandt, A.Juste, A.Lipton, R.Meyer, A.Brandt, O.Lee, S. W.Brock, R.Brooijmans, G.Santos, A. S. [UNESP]Bross, A.Hauptman, J. M.Brown, D.Cooke, M.Brown, J.Strom, D.Bu, X. B.White, A.Dubey, A.Buehler, M.Naimuddin, M.Filthaut, F.Buescher, V.Deterre, C.Bunichev, V.Novaes, Sérgio Ferraz [UNESP]Stutte, L.Savage, G.Burdin, S.Neal, H. A.Begalli, M.Ding, P. F.Vilanova, D.Cooper, W. E.Melnitchouk, A.Corcoran, M.Couderc, F.Hagopian, S.Cousinou, M. -C.Croc, A.Kermiche, S.Kajfasz, E.Popov, A. V.Cutts, D.Liu, Y.Fortner, M.Das, A.Vokac, P.Suter, L.Davies, G.Bazterra, V.Bellantoni, L.De, K.de Jong, S. J.Prewitt, M.Hays, J.De La Cruz-Burelo, E.Grohsjean, A.Deliot, F.Jesik, R.Demarteau, M.Demina, R.Karmanov, D.Wahl, H. D.Denisov, D.Denisov, S. P.Price, D.Fox, H.Scanlon, T.Head, T.Xie, Y.Sawyer, L.Negret, J. P.Asman, B.Fuess, S.Garcia-Bellido, A.Gavrilov, V.Gay, P.Prokopenko, N.Johnston, D.Geng, W.Osta, J.Gerbaudo, D.Kasper, P. A.Liu, Z.Hebbeker, T.Gerber, C. E.Schamberger, R. D.Gershtein, Y.Neustroev, P.Protopopescu, S.Ginther, G.Piegaia, R.Golovanov, G.Atramentov, O.Wang, M. H. L. S.Goussiou, A.Lobodenko, A.Grannis, P. D.Hedin, D.Greder, S.Greenlee, H.Chen, G.Jamin, D.Greenwood, Z. D.Scheglov, Y.Katsanos, I.Gregores, E. M.Hynek, V.Grenier, G.Sekaric, J.Warchol, J.Gris, Ph.Schlobohm, S.Enari, Y.Ito, A. S.Calpas, B.Hegab, H.Sajot, G.Heinson, A. P.Heintz, U.Badaud, F.Hensel, C.Otero y Garzon, G. J.Nunnemann, T.Svoisky, P.Heredia-De La Cruz, I.Qian, J.Khalatyan, N.Herner, K.Camacho-Perez, E.Hesketh, G.Edmunds, D.Evdokimov, A.Hildreth, M. D.Hirosky, R.Takahashi, M.Lokajicek, M.Hoang, T.Lee, W. M.Hobbs, J. D.Hoeneisen, B.Hohlfeld, M.Obrant, G.Carrasco-Lizarraga, M. A.Bagby, L.Hubacek, Z.Tanasijczuk, A.Khanov, A.Watts, G.Barreto, J.Beuselinck, R.Schwanenberger, C.DeVaughan, K.Kharchilava, A.Banerjee, S.Kharzheev, Y. N.Kirby, M. H.Taylor, W.Narain, M.Kohli, J. M.Kozelov, A. V.Orduna, J.Quadt, A.de Sa, R. LopesKraus, J.Wayne, M.Kulikov, S.Schwienhorst, R.Titov, M.Kumar, A.Kupco, A.Diehl, H. T.Casey, B. C. K.Kurca, T.Quinn, B.Kuzmin, V. A.Lubatti, H. J.Barberis, E.Kvita, J.Haley, J.Lammers, S.Weber, M.Osman, N.Landsberg, G.Menezes, D.Lebrun, P.Wobisch, M.Castilla-Valdez, H.Lee, H. S.Wicke, D.Bassler, U.Avila, C.Luna-Garcia, R.Verzocchi, M.Lyon, A. L.Maciel, A. K. A.Dominguez, A.Mackin, D.Shivpuri, R. K.Severini, H.Madar, R.Tokmenin, V. V.Padilla, M.Magana-Villalba, R.Gruenendahl, S.Malik, S.Jonckheere, A.Bandurin, D. V.Malyshev, V. L.Bartlett, J. F.Rangel, M. S.Maravin, Y.Pleier, M. -A.Martinez-Ortega, J.McCarthy, R.McGivern, C. L.Beri, S. B.Gruenewald, M. W.Dorland, T.Meijer, M. M.Beale, S.Chakrabarti, S.Dutt, S.Fisher, W.Williams, M. R. J.Iashvili, I.Pal, A.Arov, M.Parashar, N.Parihar, V.Schellman, H.Park, S. K.Parsons, J.Shabalina, E.Tsai, Y. -T.Ranjan, K.Partridge, R.Chakraborty, D.Parua, N.Wilson, G. W.Patwa, A.Penning, B.Ilchenko, Y.Guillemin, T.Perfilov, M.Bertram, I.Bean, A.Begel, M.Duggan, D.Peters, K.Peters, Y.Chan, K. M.Shary, V.Petridis, K.Salcido, P.Petrillo, G.Choi, S.Guo, F.Petroff, P.Chevalier-Thery, S.Diesburg, M.Ratoff, P. N.Burnett, T. H.Razumov, I.Renkel, P.Jabeen, S.Rijssenbeek, M.Xu, C.Wood, D. R.Ripp-Baudot, I.Simak, V.Rizatdinova, F.Lellouch, J.Rominsky, M.Nayyar, R.Dudko, L. V.Ross, A.Dyshkant, A.Tsybychev, D.Royon, C.Rubinov, P.Belanger-Champagne, C.Ruchti, R.Evdokimov, V. N.Li, L.Jaffre, M.Safronov, G.Ellison, J.Gutierrez, G.Johns, K.Cho, D. K.Mercadante, P. G.Sirotenko, V.Desai, S.Skubic, P.Slattery, P.Welty-Rieger, L.Smirnov, D.Smith, K. J.Bezzubov, V. A.Tuchming, B.Bernardi, G.Gutierrez, P.Snow, G. R.Cho, S. W.Snow, J.Snyder, S.Merkin, M.Li, Q. Z.Soeldner-Rembold, S.Elvira, V. D.Evans, H.Jayasinghe, A.Sonnenschein, L.Soustruznik, K.Haas, A.Wyatt, T. R.Stark, J.Vesterinen, M.Stolin, V.Baringer, P.Stoyanova, D. A.Han, L.Illingworth, R.Tully, C.Grivaz, J. -F.Uvarov, L.Uvarov, S.Meyer, J.Uzunyan, S.Choudhary, B.Van Kooten, R.Yacoob, S.Van Leeuwen, W. M.Podesta-Lerma, P. L. M.Varelas, N.Schliephake, T.Baldin, B.Varnes, E. W.Johnson, M.Besancon, M.Vasilyev, I. A.Askew, A.Verdier, P.Kaadze, K.Podstavkov, V. M.Miconi, F.Vertogradov, L. S.Jonsson, P.Lietti, S. M. [UNESP]BackusMayes, J.Sanchez-Hernandez, A.Yamada, R.Huske, N.Yang, W. -C.Yasuda, T.Chandra, A.Yatsunenko, Y. A.Ye, Z.Fisk, H. E.Facini, G.Lim, J. K.Yin, H.Harder, K.Bhat, P. C.Yip, K.Sanders, M. P.Polozov, P.Youn, S. W.Joshi, J.Muanza, G. S.Yu, J.Zelitch, S.Lincoln, D.Cihangir, S.Zhao, T.Buszello, C. P.Zhou, B.Duperrin, A.Zhu, J.2013-09-302014-05-202013-09-302014-05-202011-09-14Physical Review D. College Pk: Amer Physical Soc, v. 84, n. 5, p. 18, 2011.1550-7998http://hdl.handle.net/11449/24581We present a direct measurement of the mass difference between top and antitop quarks (Delta m) in lepton + jets t (t) over bar final states using the matrix element method. The purity of the lepton + jets sample is enhanced for t (t) over bar events by identifying at least one of the jets as originating from a b quark. The analyzed data correspond to 3.6 fb(-1) of p (p) over bar collisions at root s = 1.96 TeV acquired by D0 in Run II of the Fermilab Tevatron Collider. The combination of the e + jets and mu + jets channels yields Delta m = 0.8 +/- 1.8(stat) +/- 0.5(syst) GeV, which is in agreement with the standard model expectation of no mass difference.18engArtigo10.1103/PhysRevD.84.052005WOS:000294927000003Acesso abertoWOS000294927000003.pdf