학술논문

Measurement of spin correlation between top and antitop quarks produced in p(p)over-bar collisions at root s=1.96 TeV
Document Type
Author
Abazov, V. M.Abbott, B.Acharya, B. S.Adams, M.Adams, T.Agnew, J. P.Alexeev, G. D.Alkhazov, G.Alton, A.Askew, A.Atkins, S.Augsten, K.Aushev, V.Aushev, Y.Avila, C.Badaud, F.Bagby, L.Baldin, B.Bandurin, D. V.Banerjee, S.Barberis, E.Baringer, P.Bartlett, J. F.Bassler, U.Bazterra, V.Bean, A.Begalli, M.Bellantoni, L.Beri, S. B.Bernardi, G.Bernhard, R.Bertram, I.Besancon, M.Beuselinck, R.Bhat, P. C.Bhatia, S.Bhatnagar, V.Blazey, G.Blessing, S.Bloom, K.Boehnlein, A.Boline, D.Boos, E. E.Borissov, G.Borysova, M.Brandt, A.Brandt, O.Brock, R.Bross, A.Brown, D.Bu, X. B.Buehler, M.Buescher, V.Bunichev, V.Burdin, S.Buszello, Claus P.Camacho-Perez, E.Casey, B. C. K.Castilla-Valdez, H.Caughron, S.Chakrabarti, S.Chan, K. M.Chandra, A.Chapon, E.Chen, G.Cho, S. W.Choi, S.Choudhary, B.Cihangir, S.Claes, D.Clutter, J.Cooke, M.Cooper, W. E.Corcoran, M.Couderc, F.Cousinou, M. -CCuth, J.Cutts, D.Das, A.Davies, G.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.Dubey, A.Dudko, L. V.Duperrin, A.Dutt, S.Eads, M.Edmunds, D.Ellison, J.Elvira, V. D.Enari, Y.Evans, H.Evdokimov, A.Evdokimov, V. N.Faure, A.Feng, L.Ferbel, T.Fiedler, F.Filthaut, F.Fisher, W.Fisk, H. E.Fortner, M.Fox, H.Franc, J.Fuess, S.Garbincius, P. H.Garcia-Bellido, A.Garcia-Gonzalez, J. A.Gavrilov, V.Geng, W.Gerber, C. E.Gershtein, Y.Ginther, G.Gogota, O.Golovanov, G.Grannis, P. D.Greder, S.Greenlee, H.Grenier, G.Gris, Ph.Grivaz, J. -FGrohsjean, A.Gruenendahl, S.Gruenewald, M. W.Guillemin, T.Gutierrez, G.Gutierrez, P.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.Heredia-De La Cruz, I.Herner, K.Hesketh, G.Hildreth, M. D.Hirosky, R.Hoang, T.Hobbs, J. D.Hoeneisen, B.Hogan, J.Hohlfeld, M.Holzbauerbg, J. L.Howley, I.Hubacek, Z.Hynek, V.Iashvili, I.Ilchenko, Y.Illingvvorth, R.Ito, A. S.Jabeen, S.Jaffre, M.Jayasinghe, A.Jeong, M. S.Jesik, R.Jiang, P.Johns, K.Johnson, E.Johnson, M.Jonckheere, A.Jonsson, P.Joshi, J.Jung, A. W.Juste, A.Kajfasz, E.Karacheban, O.Karmanov, D.Katsanos, I.Kaur, M.Kehoe, R.Kermiche, S.Khalatyan, N.Khanov, A.Kharchilava, A.Kharzheev, Y. N.Kiselevich, I.Kohli, J. M.Kozelov, A. V.Kraus, J.Kumar, A.Kupco, A.Kurca, T.Kuzmin, V. A.Lammers, S.Lebrun, P.Lee, H. S.Lee, S. W.Lee, W. M.Lei, X.Lellouch, J.Li, D.Li, H.Li, L.Li, Q. Z.Lim, J. K.Lincoln, D.Linnemann, J.Lipaev, V. V.Lipton, R.Liu, H.Liu, Y.Lobodenko, A.Lokajicek, M.de Sa, R. LopesLuna-Garcia, R.Lyon, A. L.Maciel, A. K. A.Madar, R.Magana-Villalba, R.Malik, S.Malyshev, V. L.Mansour, J.Martinez-Ortega, J.McCarthy, R.McGivern, C. L.Meijer, M. M.Melnitchouk, A.Menezes, D.Mercadante, P. G.Merkin, M.Meyers, A.Meyer, J.Miconi, F.Mondal, N. K.Mulhearn, M.Nagy, E.Narain, M.Nayyar, R.Neal, H. A.Negret, J. P.Neustroev, P.Nguyen, H. T.Nunnemann, T.Orduna, J.Osman, N.Osta, J.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.Pleier, M. -APodstavkov, V. M.Popov, A. V.Prewitt, M.Price, D.Prokopenko, N.Qian, J.Quadt, A. T.Quinn, B.Ratoff, P. N.Razumov, I.Ripp-Baudot, I.Rizatdinova, F.Rominsky, M.Ross, A.Royon, C.Rubinov, P.Ruchti, R.Sajot, G.Sanchez-Hernandez, A.Sanders, M. P.Santos, A. S.Savage, G.Savitskyi, M.Sawyer, L.Scanlon, T.Schamberger, R. D.Scheglov, Y.Schellman, H.Schott, M.Schwanenberger, C.Schwienhorst, R.Sekaric, J.Severini, H.Shabalina, E.Shary, V.Shaw, S.Shchukin, A. A.Simak, V.Skubic, P.Slattery, P.Smirnov, D.Snow, G. R.Snow, TtSnyder, S.Soeldner-Rembold, S.Sonnenschein, L.Soustruznik, K.Stark, J.Stefaniuk, N.Stoyanova, D. A.Strauss, M.Suter, L.Svoisky, P.Titov, M.Tokmenin, V. V.Tsai, Y. -TTsybychev, 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.Verkheev, A. Y.Vertogradov, L. S.Verzocchi, M.Vesterinen, M.Vilanova, D.Vokac, P.Wahl, H. D.Wang, M. H. L. S.Warchol, T.Watts, G.Wayne, M.Weichert, J.Welty-Rieger, L.Williams, M. R. J.Wilson, G. W.Wobisch, M.Wood, D. R.Wyatt, T. R.Xie, Y.Yamada, R.Yang, S.Yasuda, T.Yatsunenko, Y. A.Ye, W.Ye, Z.Yin, H.Yip, K.Youn, S. W.Yu, J. M.Zennamo, J.Zhao, T. G.Zhou, B.Zhu, J.Zielinski, M.Zieminska, D.Zivkovic, L.
Source
Physics Letters B. 757:199-206
Subject
Language
English
ISSN
0370-2693
1873-2445
Abstract
We present a measurement of the correlation between the spins of t and (t) over bar quarks produced in proton-antiproton collisions at the Tevatron Collider at a center-of-mass energy of 1.96 TeV. We apply a matrix element technique to dilepton and single-lepton+jets final states in data accumulated with the DO detector that correspond to an integrated luminosity of 9.7 fb(-1). The measured value of the correlation coefficient in the off-diagonal basis, O-off = 0.89 +/- 0.22 (stat + syst), is in agreement with the standard model prediction, and represents evidence for a top-antitop quark spin correlation difference from zero at a level of 4.2 standard deviations.