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Evidence for Spin Correlation in t(t)over-bar Production

Authors
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.Askew, A.Asman, B.Atkins, S.Atramentov, O.Augsten, K.Avila, C.BackusMayes, J.Badaud, F.Bagby, L.Baldin, B.Bandurin, D. V.Banerjee, S.Barberis, E.Baringer, P.Barreto, J.Bartlett, J. F.Bassler, U.Bazterra, V.Bean, A.Begalli, M.Belanger-Champagne, C.Bellantoni, L.Beri, S. B.Bernardi, G.Bernhard, R.Bertram, I.Besancon, M.Beuselinck, R.Bezzubov, V. A.Bhat, P. C.Bhatnagar, V.Blazey, G.Blessing, S.Bloom, K.Boehnlein, A.Boline, D.Boos, E. E.Borissov, G.Bose, T.Brandt, A.Brandt, O.Brock, R.Brooijmans, G.Bross, A.Brown, D.Brown, J.Bu, X. B.Buehler, M.Buescher, V.Bunichev, V.Burdin, S.Burnett, T. H.Buszello, C. P.Calpas, B.Camacho-Perez, E.Carrasco-Lizarraga, M. A.Casey, B. C. K.Castilla-Valdez, H.Chakrabarti, S.Chakraborty, D.Chan, K. M.Chandra, A.Chapon, E.Chen, G.Chevalier-Thery, S.Cho, D. K.Cho, S. W.Choi, S.Choudhary, B.Cihangir, S.Claes, D.Clutter, J.Cooke, M.Cooper, W. E.Corcoran, M.Couderc, F.Cousinou, M. -C.Croc, A.Cutts, D.Das, A.Davies, G.De, K.de Jong, S. J.De la Cruz-Burelo, E.Deliot, F.Demina, R.Denisov, D.Denisov, S. P.Desai, S.Deterre, C.DeVaughan, K.Diehl, H. T.Diesburg, M.Ding, P. F.Dominguez, A.Dorland, T.Dubey, A.Dudko, L. V.Duggan, D.Duperrin, A.Dutt, S.Dyshkant, A.Eads, M.Edmunds, D.Ellison, J.Elvira, V. D.Enari, Y.Evans, H.Evdokimov, A.Evdokimov, V. N.Facini, G.Ferbel, T.Fiedler, F.Filthaut, F.Fisher, W.Fisk, H. E.Fortner, M.Fox, H.Fuess, S.Garcia-Bellido, A.Garcia-Guerra, G. A.Gavrilov, V.Gay, P.Geng, W.Gerbaudo, D.Gerber, C. E.Gershtein, Y.Ginther, G.Golovanov, G.Goussiou, A.Grannis, P. D.Greder, S.Greenlee, H.Greenwood, Z. D.Gregores, E. M.Grenier, G.Gris, PhGrivaz, J. -F.Grohsjean, A.Gruenendahl, S.Gruenewald, M. W.Guillemin, T.Gutierrez, G.Gutierrez, P.Haas, A.Hagopian, S.Haley, J.Han, L.Harder, K.Harel, A.Hauptman, J. M.Hays, J.Head, T.Hebbeker, T.Hedin, D.Hegab, H.Heinson, A. P.Heintz, U.Hensel, C.la Cruz, I. Heredia-DeHerner, K.Hesketh, G.Hildreth, M. D.Hirosky, R.Hoang, T.Hobbs, J. D.Hoeneisen, B.Hohlfeld, M.Hubacek, Z.Hynek, V.Iashvili, I.Ilchenko, Y.Illingworth, R.Ito, A. S.Jabeen, S.Jaffre, M.Jamin, D.Jayasinghe, A.Jesik, R.Johns, K.Johnson, M.Jonckheere, A.Jonsson, P.Joshi, J.Jung, A. W.Juste, A.Kaadze, K.Kajfasz, E.Karmanov, D.Kasper, P. A.Katsanos, I.Kehoe, R.Kermiche, S.Khalatyan, N.Khanov, A.Kharchilava, A.Kharzheev, Y. N.Kohli, J. M.Kozelov, A. V.Kraus, J.Kulikov, S.Kumar, A.Kupco, A.Kurca, T.Kuzmin, V. A.Kvita, J.Lammers, S.Landsberg, G.Lebrun, P.Lee, H. S.Lee, S. W.Lee, W. M.Lellouch, J.Li, L.Li, Q. Z.Lietti, S. M.Lim, J. K.Lincoln, D.Linnemann, J.Lipaev, V. V.Lipton, R.Liu, Y.Lobodenko, A.Lokajicek, M.de Sa, R. LopesLubatti, H. J.Luna-Garcia, R.Lyon, A. L.Maciel, A. K. A.Mackin, D.Madar, R.Magana-Villalba, R.Malik, S.Malyshev, V. L.Maravin, Y.Martinez-Ortega, J.McCarthy, R.McGivern, C. L.Meijer, M. M.Melnitchouk, A.Menezes, D.Mercadante, P. G.Merkin, M.Meyer, A.Meyer, J.Miconi, F.Mondal, N. K.Muanza, G. S.Mulhearn, M.Nagy, E.Naimuddin, M.Narain, M.Nayyar, R.Neal, H. A.Negret, J. P.Neustroev, P.Novaes, S. F.Nunnemann, T.Obrant, G.Orduna, J.Osman, N.Osta, J.Otero y Garzon, G. J.Padilla, M.Pal, A.Parashar, N.Parihar, V.Park, S. K.Partridge, R.Parua, N.Patwa, A.Penning, B.Perfilov, M.Peters, Y.Petridis, K.Petrillo, G.Petroff, P.Piegaia, R.Pleier, M. -A.Podesta-Lerma, P. L. M.Podstavkov, V. M.Polozov, P.Popov, A. V.Prewitt, M.Price, D.Prokopenko, N.Qian, J.Quadt, A.Quinn, B.Rangel, M. S.Ranjan, K.Ratoff, P. N.Razumov, I.Renkel, P.Rijssenbeek, M.Ripp-Baudot, I.Rizatdinova, F.Rominsky, M.Ross, A.Royon, C.Rubinov, P.Ruchti, R.Safronov, G.Sajot, G.Salcido, P.Sanchez-Hernandez, A.Sanders, M. P.Sanghi, B.Santos, A. S.Savage, G.Sawyer, L.Scanlon, T.Schamberger, R. D.Scheglov, Y.Schellman, H.Schliephake, T.Schlobohm, S.Schwanenberger, C.Schwienhorst, R.Sekaric, J.Severini, H.Shabalina, E.Shary, V.Shchukin, A. A.Shivpuri, R. K.Simak, V.Sirotenko, V.Skubic, P.Slattery, P.Smirnov, D.Smith, K. J.Snow, G. R.Snow, J.Snyder, S.Soeldner-Rembold, S.Sonnenschein, L.Soustruznik, K.Stark, J.Stolin, V.Stoyanova, D. A.Strauss, M.Strom, D.Stutte, L.Suter, L.Svoisky, P.Takahashi, M.Tanasijczuk, A.Titov, M.Tokmenin, V. V.Tsai, Y. -T.Tschann-Grimm, K.Tsybychev, D.Tuchming, B.Tully, C.Uvarov, L.Uvarov, S.Uzunyan, S.Van Kooten, R.van Leeuwen, W. M.Varelas, N.Varnes, E. W.Vasilyev, I. A.Verdier, P.Vertogradov, L. S.Verzocchi, M.Vesterinen, M.Vilanova, D.Vokac, P.Wahl, H. D.Wang, M. H. L. S.Warchol, J.Watts, G.Wayne, M.Weber, M.Welty-Rieger, L.White, A.Wicke, D.Williams, M. R. J.Wilson, G. W.Wobisch, M.Wood, D. R.Wyatt, T. R.Xie, Y.Yamada, R.Yang, W. -C.Yasuda, T.Yatsunenko, Y. A.Ye, Z.Yin, H.Yip, K.Youn, S. W.Yu, J.Zhao, T.Zhou, B.Zhu, J.Zielinski, M.Zieminska, D.Zivkovic, L.
Issue Date
19-1월-2012
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.108, no.3
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW LETTERS
Volume
108
Number
3
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/109069
DOI
10.1103/PhysRevLett.108.032004
ISSN
0031-9007
Abstract
We present a measurement of the ratio of events with correlated t and (t) over bar spins to the total number of t (t) over bar events. This ratio f is evaluated using a matrix-element-based approach in 729 t (t) over bar candidate events with a single lepton l (electron or muon) and at least four jets. The analyzed p (p) over bar collisions data correspond to an integrated luminosity of 5: 3 fb(-1) and were collected with the D0 detector at the Fermilab Tevatron collider operating at a center-of-mass energy root s = 1.96 TeV. Combining this result with a recent measurement of f in dileptonic final states, we find f in agreement with the standard model. In addition, the combination provides evidence for the presence of spin correlation in t (t) over bar events with a significance of more than 3 standard deviations.
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