Simultaneous measurement of forward-backward asymmetry and top polarization in dilepton final states from tt ¯ production at the Tevatron

V. M. Abazov, B. Abbott, B. S. Acharya, M. Adams, T. Adams, J. P. Agnew, G. D. Alexeev, G. Alkhazov, A. Alton, A. Askew, S. Atkins, K. Augsten, C. Avila, F. Badaud, L. Bagby, B. Baldin, D. V. Bandurin, S. Banerjee, E. Barberis, P. BaringerJ. F. Bartlett, U. Bassler, V. Bazterra, A. Bean, M. Begalli, L. Bellantoni, S. B. Beri, G. Bernardi, R. Bernhard, I. Bertram, M. Besançon, R. Beuselinck, P. C. Bhat, S. Bhatia, V. Bhatnagar, G. Blazey, S. Blessing, K. Bloom, A. Boehnlein, D. Boline, E. E. Boos, G. Borissov, M. Borysova, A. Brandt, O. Brandt, R. Brock, A. Bross, D. Brown, X. B. Bu, M. Buehler, V. Buescher, V. Bunichev, S. Burdin, C. P. Buszello, E. Camacho-Pérez, B. C K Casey, H. Castilla-Valdez, S. Caughron, S. Chakrabarti, K. M. Chan, A. Chandra, E. Chapon, G. Chen, 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, J. Cuth, D. Cutts, A. Das, G. Davies, S. J. De Jong, E. De La Cruz-Burelo, F. Déliot, R. Demina, D. Denisov, S. P. Denisov, S. Desai, C. Deterre, K. Devaughan, H. T. Diehl, M. Diesburg, P. F. Ding, A. Dominguez, A. Dubey, L. V. Dudko, A. Duperrin, S. Dutt, M. Eads, D. Edmunds, J. Ellison, V. D. Elvira, Y. Enari, H. Evans, A. Evdokimov, V. N. Evdokimov, A. Fauré, L. Feng, T. Ferbel, F. Fiedler, F. Filthaut, W. Fisher, H. E. Fisk, M. Fortner, H. Fox, S. Fuess, P. H. Garbincius, A. Garcia-Bellido, J. A. García-González, V. Gavrilov, W. Geng, C. E. Gerber, Y. Gershtein, G. Ginther, O. Gogota, G. Golovanov, P. D. Grannis, S. Greder, H. Greenlee, G. Grenier, Ph Gris, J. F. Grivaz, A. Grohsjean, S. Grünendahl, M. W. Grünewald, T. Guillemin, G. Gutierrez, P. Gutierrez, 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, J. Hogan, M. Hohlfeld, J. L. Holzbauer, I. Howley, Z. Hubacek, V. Hynek, I. Iashvili, Y. Ilchenko, R. Illingworth, A. S. Ito, S. Jabeen, M. Jaffré, A. Jayasinghe, M. S. Jeong, R. Jesik, P. Jiang, Kenneth A Johns, E. Johnson, M. Johnson, A. Jonckheere, P. Jonsson, J. Joshi, A. W. Jung, A. Juste, E. Kajfasz, D. Karmanov, I. Katsanos, M. Kaur, R. Kehoe, S. Kermiche, N. Khalatyan, A. Khanov, A. Kharchilava, Y. N. Kharzheev, I. Kiselevich, J. M. Kohli, A. V. Kozelov, J. Kraus, A. Kumar, A. Kupco, T. Kurča, V. A. Kuzmin, S. Lammers, P. Lebrun, H. S. Lee, S. W. Lee, W. M. Lee, X. Lei, J. Lellouch, D. Li, H. Li, L. Li, Q. Z. Li, J. K. Lim, D. Lincoln, J. Linnemann, V. V. Lipaev, R. Lipton, H. Liu, Y. Liu, A. Lobodenko, M. Lokajicek, R. Lopes De Sa, R. Luna-Garcia, A. L. Lyon, A. K A Maciel, R. Madar, R. Magaña-Villalba, S. Malik, V. L. Malyshev, J. Mansour, 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, M. Mulhearn, E. Nagy, M. Narain, R. Nayyar, H. A. Neal, J. P. Negret, P. Neustroev, H. T. Nguyen, T. Nunnemann, J. Orduna, N. Osman, J. Osta, A. Pal, N. Parashar, V. Parihar, S. K. Park, R. Partridge, N. Parua, A. Patwa, B. Penning, M. Perfilov, Y. Peters, K. Petridis, G. Petrillo, P. Pétroff, M. A. Pleier, V. M. Podstavkov, A. V. Popov, M. Prewitt, D. Price, N. Prokopenko, J. Qian, A. Quadt, B. Quinn, P. N. Ratoff, I. Razumov, I. Ripp-Baudot, F. Rizatdinova, M. Rominsky, A. Ross, C. Royon, P. Rubinov, R. Ruchti, G. Sajot, A. Sánchez-Hernández, M. P. Sanders, A. S. Santos, G. Savage, M. Savitskyi, L. Sawyer, T. Scanlon, R. D. Schamberger, Y. Scheglov, H. Schellman, M. Schott, C. Schwanenberger, R. Schwienhorst, J. Sekaric, H. Severini, E. Shabalina, V. Shary, S. Shaw, A. A. Shchukin, V. Simak, P. Skubic, P. Slattery, D. Smirnov, G. R. Snow, J. Snow, S. Snyder, S. Söldner-Rembold, L. Sonnenschein, K. Soustruznik, J. Stark, D. A. Stoyanova, M. Strauss, L. Suter, P. Svoisky, 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, Erich W Varnes, I. A. Vasilyev, A. Y. Verkheev, 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, J. Weichert, L. Welty-Rieger, M. R J Williams, G. W. Wilson, M. Wobisch, D. R. Wood, T. R. Wyatt, Y. Xie, R. Yamada, S. Yang, T. Yasuda, Y. A. Yatsunenko, W. Ye, Z. Ye, H. Yin, K. Yip, S. W. Youn, J. M. Yu, J. Zennamo, T. G. Zhao, B. Zhou, J. Zhu, M. Zielinski, D. Zieminska, L. Zivkovic

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

We present a simultaneous measurement of the forward-backward asymmetry and the top-quark polarization in tt¯ production in dilepton final states using 9.7fb-1 of proton-antiproton collisions at s=1.96TeV with the D0 detector. To reconstruct the distributions of kinematic observables we employ a matrix element technique that calculates the likelihood of the possible tt¯ kinematic configurations. After accounting for the presence of background events and for calibration effects, we obtain a forward-backward asymmetry of Att¯=(15.0±6.4(stat)±4.9(syst))% and a top-quark polarization times spin analyzing power in the beam basis of κP=(7.2±10.5(stat)±4.2(syst))%, with a correlation of -56% between the measurements. If we constrain the forward-backward asymmetry to its expected standard model value, we obtain a measurement of the top polarization of κP=(11.3±9.1(stat)±1.9(syst))%. If we constrain the top polarization to its expected standard model value, we measure a forward-backward asymmetry of Att¯=(17.5±5.6(stat)±3.1(syst))%. A combination with the D0 Att¯ measurement in the lepton+jets final state yields an asymmetry of Att¯=(11.8±2.5(stat)±1.3(syst))%. Within their respective uncertainties, all these results are consistent with the standard model expectations.

Original languageEnglish (US)
Article number052007
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume92
Issue number5
DOIs
StatePublished - Sep 22 2015

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asymmetry
polarization
kinematics
quarks
antiprotons
leptons
collisions
protons
detectors
matrices
configurations

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Simultaneous measurement of forward-backward asymmetry and top polarization in dilepton final states from tt ¯ production at the Tevatron. / 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.; 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.; Besançon, 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, C. P.; Camacho-Pérez, 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. C.; Cuth, J.; Cutts, D.; Das, A.; Davies, G.; De Jong, S. J.; De La Cruz-Burelo, E.; Déliot, 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.; Fauré, A.; Feng, L.; Ferbel, T.; Fiedler, F.; Filthaut, F.; Fisher, W.; Fisk, H. E.; Fortner, M.; Fox, H.; Fuess, S.; Garbincius, P. H.; Garcia-Bellido, A.; García-González, 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. F.; Grohsjean, A.; Grünendahl, S.; Grünewald, 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.; Holzbauer, J. L.; Howley, I.; Hubacek, Z.; Hynek, V.; Iashvili, I.; Ilchenko, Y.; Illingworth, R.; Ito, A. S.; Jabeen, S.; Jaffré, M.; Jayasinghe, A.; Jeong, M. S.; Jesik, R.; Jiang, P.; Johns, Kenneth A; Johnson, E.; Johnson, M.; Jonckheere, A.; Jonsson, P.; Joshi, J.; Jung, A. W.; Juste, A.; Kajfasz, E.; 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.; Kurča, 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.; Lopes De Sa, R.; Luna-Garcia, R.; Lyon, A. L.; Maciel, A. K A; Madar, R.; Magaña-Villalba, R.; Malik, S.; Malyshev, V. L.; Mansour, J.; Martínez-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.; 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.; Pétroff, P.; Pleier, M. A.; Podstavkov, V. M.; Popov, A. V.; Prewitt, M.; Price, D.; Prokopenko, N.; Qian, J.; Quadt, A.; Quinn, B.; Ratoff, P. N.; Razumov, I.; Ripp-Baudot, I.; Rizatdinova, F.; Rominsky, M.; Ross, A.; Royon, C.; Rubinov, P.; Ruchti, R.; Sajot, G.; Sánchez-Hernández, 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, J.; Snyder, S.; Söldner-Rembold, S.; Sonnenschein, L.; Soustruznik, K.; Stark, J.; Stoyanova, D. A.; Strauss, M.; Suter, L.; Svoisky, P.; Titov, M.; Tokmenin, V. V.; Tsai, Y. T.; Tsybychev, D.; Tuchming, B.; Tully, C.; Uvarov, L.; Uvarov, S.; Uzunyan, S.; Van Kooten, R.; Van Leeuwen, W. M.; Varelas, N.; Varnes, Erich 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, J.; 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.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 92, No. 5, 052007, 22.09.2015.

Research output: Contribution to journalArticle

Abazov, VM, Abbott, B, Acharya, BS, Adams, M, Adams, T, Agnew, JP, Alexeev, GD, Alkhazov, G, Alton, A, Askew, A, Atkins, S, Augsten, K, Avila, C, Badaud, F, Bagby, L, Baldin, B, Bandurin, DV, Banerjee, S, Barberis, E, Baringer, P, Bartlett, JF, Bassler, U, Bazterra, V, Bean, A, Begalli, M, Bellantoni, L, Beri, SB, Bernardi, G, Bernhard, R, Bertram, I, Besançon, M, Beuselinck, R, Bhat, PC, Bhatia, S, Bhatnagar, V, Blazey, G, Blessing, S, Bloom, K, Boehnlein, A, Boline, D, Boos, EE, Borissov, G, Borysova, M, Brandt, A, Brandt, O, Brock, R, Bross, A, Brown, D, Bu, XB, Buehler, M, Buescher, V, Bunichev, V, Burdin, S, Buszello, CP, Camacho-Pérez, E, Casey, BCK, Castilla-Valdez, H, Caughron, S, Chakrabarti, S, Chan, KM, Chandra, A, Chapon, E, Chen, G, Cho, SW, Choi, S, Choudhary, B, Cihangir, S, Claes, D, Clutter, J, Cooke, M, Cooper, WE, Corcoran, M, Couderc, F, Cousinou, MC, Cuth, J, Cutts, D, Das, A, Davies, G, De Jong, SJ, De La Cruz-Burelo, E, Déliot, F, Demina, R, Denisov, D, Denisov, SP, Desai, S, Deterre, C, Devaughan, K, Diehl, HT, Diesburg, M, Ding, PF, Dominguez, A, Dubey, A, Dudko, LV, Duperrin, A, Dutt, S, Eads, M, Edmunds, D, Ellison, J, Elvira, VD, Enari, Y, Evans, H, Evdokimov, A, Evdokimov, VN, Fauré, A, Feng, L, Ferbel, T, Fiedler, F, Filthaut, F, Fisher, W, Fisk, HE, Fortner, M, Fox, H, Fuess, S, Garbincius, PH, Garcia-Bellido, A, García-González, JA, Gavrilov, V, Geng, W, Gerber, CE, Gershtein, Y, Ginther, G, Gogota, O, Golovanov, G, Grannis, PD, Greder, S, Greenlee, H, Grenier, G, Gris, P, Grivaz, JF, Grohsjean, A, Grünendahl, S, Grünewald, MW, Guillemin, T, Gutierrez, G, Gutierrez, P, Haley, J, Han, L, Harder, K, Harel, A, Hauptman, JM, Hays, J, Head, T, Hebbeker, T, Hedin, D, Hegab, H, Heinson, AP, Heintz, U, Hensel, C, Heredia-De La Cruz, I, Herner, K, Hesketh, G, Hildreth, MD, Hirosky, R, Hoang, T, Hobbs, JD, Hoeneisen, B, Hogan, J, Hohlfeld, M, Holzbauer, JL, Howley, I, Hubacek, Z, Hynek, V, Iashvili, I, Ilchenko, Y, Illingworth, R, Ito, AS, Jabeen, S, Jaffré, M, Jayasinghe, A, Jeong, MS, Jesik, R, Jiang, P, Johns, KA, Johnson, E, Johnson, M, Jonckheere, A, Jonsson, P, Joshi, J, Jung, AW, Juste, A, Kajfasz, E, Karmanov, D, Katsanos, I, Kaur, M, Kehoe, R, Kermiche, S, Khalatyan, N, Khanov, A, Kharchilava, A, Kharzheev, YN, Kiselevich, I, Kohli, JM, Kozelov, AV, Kraus, J, Kumar, A, Kupco, A, Kurča, T, Kuzmin, VA, Lammers, S, Lebrun, P, Lee, HS, Lee, SW, Lee, WM, Lei, X, Lellouch, J, Li, D, Li, H, Li, L, Li, QZ, Lim, JK, Lincoln, D, Linnemann, J, Lipaev, VV, Lipton, R, Liu, H, Liu, Y, Lobodenko, A, Lokajicek, M, Lopes De Sa, R, Luna-Garcia, R, Lyon, AL, Maciel, AKA, Madar, R, Magaña-Villalba, R, Malik, S, Malyshev, VL, Mansour, J, Martínez-Ortega, J, McCarthy, R, McGivern, CL, Meijer, MM, Melnitchouk, A, Menezes, D, Mercadante, PG, Merkin, M, Meyer, A, Meyer, J, Miconi, F, Mondal, NK, Mulhearn, M, Nagy, E, Narain, M, Nayyar, R, Neal, HA, Negret, JP, Neustroev, P, Nguyen, HT, Nunnemann, T, Orduna, J, Osman, N, Osta, J, Pal, A, Parashar, N, Parihar, V, Park, SK, Partridge, R, Parua, N, Patwa, A, Penning, B, Perfilov, M, Peters, Y, Petridis, K, Petrillo, G, Pétroff, P, Pleier, MA, Podstavkov, VM, Popov, AV, Prewitt, M, Price, D, Prokopenko, N, Qian, J, Quadt, A, Quinn, B, Ratoff, PN, Razumov, I, Ripp-Baudot, I, Rizatdinova, F, Rominsky, M, Ross, A, Royon, C, Rubinov, P, Ruchti, R, Sajot, G, Sánchez-Hernández, A, Sanders, MP, Santos, AS, Savage, G, Savitskyi, M, Sawyer, L, Scanlon, T, Schamberger, RD, Scheglov, Y, Schellman, H, Schott, M, Schwanenberger, C, Schwienhorst, R, Sekaric, J, Severini, H, Shabalina, E, Shary, V, Shaw, S, Shchukin, AA, Simak, V, Skubic, P, Slattery, P, Smirnov, D, Snow, GR, Snow, J, Snyder, S, Söldner-Rembold, S, Sonnenschein, L, Soustruznik, K, Stark, J, Stoyanova, DA, Strauss, M, Suter, L, Svoisky, P, Titov, M, Tokmenin, VV, Tsai, YT, Tsybychev, D, Tuchming, B, Tully, C, Uvarov, L, Uvarov, S, Uzunyan, S, Van Kooten, R, Van Leeuwen, WM, Varelas, N, Varnes, EW, Vasilyev, IA, Verkheev, AY, Vertogradov, LS, Verzocchi, M, Vesterinen, M, Vilanova, D, Vokac, P, Wahl, HD, Wang, MHLS, Warchol, J, Watts, G, Wayne, M, Weichert, J, Welty-Rieger, L, Williams, MRJ, Wilson, GW, Wobisch, M, Wood, DR, Wyatt, TR, Xie, Y, Yamada, R, Yang, S, Yasuda, T, Yatsunenko, YA, Ye, W, Ye, Z, Yin, H, Yip, K, Youn, SW, Yu, JM, Zennamo, J, Zhao, TG, Zhou, B, Zhu, J, Zielinski, M, Zieminska, D & Zivkovic, L 2015, 'Simultaneous measurement of forward-backward asymmetry and top polarization in dilepton final states from tt ¯ production at the Tevatron', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 92, no. 5, 052007. https://doi.org/10.1103/PhysRevD.92.052007
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. ; 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. ; Besançon, 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, C. P. ; Camacho-Pérez, 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. C. ; Cuth, J. ; Cutts, D. ; Das, A. ; Davies, G. ; De Jong, S. J. ; De La Cruz-Burelo, E. ; Déliot, 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. ; Fauré, A. ; Feng, L. ; Ferbel, T. ; Fiedler, F. ; Filthaut, F. ; Fisher, W. ; Fisk, H. E. ; Fortner, M. ; Fox, H. ; Fuess, S. ; Garbincius, P. H. ; Garcia-Bellido, A. ; García-González, 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. F. ; Grohsjean, A. ; Grünendahl, S. ; Grünewald, 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. ; Holzbauer, J. L. ; Howley, I. ; Hubacek, Z. ; Hynek, V. ; Iashvili, I. ; Ilchenko, Y. ; Illingworth, R. ; Ito, A. S. ; Jabeen, S. ; Jaffré, M. ; Jayasinghe, A. ; Jeong, M. S. ; Jesik, R. ; Jiang, P. ; Johns, Kenneth A ; Johnson, E. ; Johnson, M. ; Jonckheere, A. ; Jonsson, P. ; Joshi, J. ; Jung, A. W. ; Juste, A. ; Kajfasz, E. ; 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. ; Kurča, 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. ; Lopes De Sa, R. ; Luna-Garcia, R. ; Lyon, A. L. ; Maciel, A. K A ; Madar, R. ; Magaña-Villalba, R. ; Malik, S. ; Malyshev, V. L. ; Mansour, J. ; Martínez-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. ; 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. ; Pétroff, P. ; Pleier, M. A. ; Podstavkov, V. M. ; Popov, A. V. ; Prewitt, M. ; Price, D. ; Prokopenko, N. ; Qian, J. ; Quadt, A. ; Quinn, B. ; Ratoff, P. N. ; Razumov, I. ; Ripp-Baudot, I. ; Rizatdinova, F. ; Rominsky, M. ; Ross, A. ; Royon, C. ; Rubinov, P. ; Ruchti, R. ; Sajot, G. ; Sánchez-Hernández, 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, J. ; Snyder, S. ; Söldner-Rembold, S. ; Sonnenschein, L. ; Soustruznik, K. ; Stark, J. ; Stoyanova, D. A. ; Strauss, M. ; Suter, L. ; Svoisky, P. ; Titov, M. ; Tokmenin, V. V. ; Tsai, Y. T. ; Tsybychev, D. ; Tuchming, B. ; Tully, C. ; Uvarov, L. ; Uvarov, S. ; Uzunyan, S. ; Van Kooten, R. ; Van Leeuwen, W. M. ; Varelas, N. ; Varnes, Erich 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, J. ; 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. / Simultaneous measurement of forward-backward asymmetry and top polarization in dilepton final states from tt ¯ production at the Tevatron. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2015 ; Vol. 92, No. 5.
@article{c52bf0065f7448f08f958fd283a2929a,
title = "Simultaneous measurement of forward-backward asymmetry and top polarization in dilepton final states from tt ¯ production at the Tevatron",
abstract = "We present a simultaneous measurement of the forward-backward asymmetry and the top-quark polarization in tt¯ production in dilepton final states using 9.7fb-1 of proton-antiproton collisions at s=1.96TeV with the D0 detector. To reconstruct the distributions of kinematic observables we employ a matrix element technique that calculates the likelihood of the possible tt¯ kinematic configurations. After accounting for the presence of background events and for calibration effects, we obtain a forward-backward asymmetry of Att¯=(15.0±6.4(stat)±4.9(syst)){\%} and a top-quark polarization times spin analyzing power in the beam basis of κP=(7.2±10.5(stat)±4.2(syst)){\%}, with a correlation of -56{\%} between the measurements. If we constrain the forward-backward asymmetry to its expected standard model value, we obtain a measurement of the top polarization of κP=(11.3±9.1(stat)±1.9(syst)){\%}. If we constrain the top polarization to its expected standard model value, we measure a forward-backward asymmetry of Att¯=(17.5±5.6(stat)±3.1(syst)){\%}. A combination with the D0 Att¯ measurement in the lepton+jets final state yields an asymmetry of Att¯=(11.8±2.5(stat)±1.3(syst)){\%}. Within their respective uncertainties, all these results are consistent with the standard model expectations.",
author = "Abazov, {V. M.} and B. Abbott and Acharya, {B. S.} and M. Adams and T. Adams and Agnew, {J. P.} and Alexeev, {G. D.} and G. Alkhazov and A. Alton and A. Askew and S. Atkins and K. Augsten and C. Avila and F. Badaud and L. Bagby and B. Baldin and Bandurin, {D. V.} and S. Banerjee and E. Barberis and P. Baringer and Bartlett, {J. F.} and U. Bassler and V. Bazterra and A. Bean and M. Begalli and L. Bellantoni and Beri, {S. B.} and G. Bernardi and R. Bernhard and I. Bertram and M. Besan{\cc}on and R. Beuselinck and Bhat, {P. C.} and S. Bhatia and V. Bhatnagar and G. Blazey and S. Blessing and K. Bloom and A. Boehnlein and D. Boline and Boos, {E. E.} and G. Borissov and M. Borysova and A. Brandt and O. Brandt and R. Brock and A. Bross and D. Brown and Bu, {X. B.} and M. Buehler and V. Buescher and V. Bunichev and S. Burdin and Buszello, {C. P.} and E. Camacho-P{\'e}rez and Casey, {B. C K} and H. Castilla-Valdez and S. Caughron and S. Chakrabarti and Chan, {K. M.} and A. Chandra and E. Chapon and G. Chen and Cho, {S. W.} and S. Choi and B. Choudhary and S. Cihangir and D. Claes and J. Clutter and M. Cooke and Cooper, {W. E.} and M. Corcoran and F. Couderc and Cousinou, {M. C.} and J. Cuth and D. Cutts and A. Das and G. Davies and {De Jong}, {S. J.} and {De La Cruz-Burelo}, E. and F. D{\'e}liot and R. Demina and D. Denisov and Denisov, {S. P.} and S. Desai and C. Deterre and K. Devaughan and Diehl, {H. T.} and M. Diesburg and Ding, {P. F.} and A. Dominguez and A. Dubey and Dudko, {L. V.} and A. Duperrin and S. Dutt and M. Eads and D. Edmunds and J. Ellison and Elvira, {V. D.} and Y. Enari and H. Evans and A. Evdokimov and Evdokimov, {V. N.} and A. Faur{\'e} and L. Feng and T. Ferbel and F. Fiedler and F. Filthaut and W. Fisher and Fisk, {H. E.} and M. Fortner and H. Fox and S. Fuess and Garbincius, {P. H.} and A. Garcia-Bellido and Garc{\'i}a-Gonz{\'a}lez, {J. A.} and V. Gavrilov and W. Geng and Gerber, {C. E.} and Y. Gershtein and G. Ginther and O. Gogota and G. Golovanov and Grannis, {P. D.} and S. Greder and H. Greenlee and G. Grenier and Ph Gris and Grivaz, {J. F.} and A. Grohsjean and S. Gr{\"u}nendahl and Gr{\"u}newald, {M. W.} and T. Guillemin and G. Gutierrez and P. Gutierrez and J. Haley and L. Han and K. Harder and A. Harel and Hauptman, {J. M.} and J. Hays and T. Head and T. Hebbeker and D. Hedin and H. Hegab and Heinson, {A. P.} and U. Heintz and C. Hensel and {Heredia-De La Cruz}, I. and K. Herner and G. Hesketh and Hildreth, {M. D.} and R. Hirosky and T. Hoang and Hobbs, {J. D.} and B. Hoeneisen and J. Hogan and M. Hohlfeld and Holzbauer, {J. L.} and I. Howley and Z. Hubacek and V. Hynek and I. Iashvili and Y. Ilchenko and R. Illingworth and Ito, {A. S.} and S. Jabeen and M. Jaffr{\'e} and A. Jayasinghe and Jeong, {M. S.} and R. Jesik and P. Jiang and Johns, {Kenneth A} and E. Johnson and M. Johnson and A. Jonckheere and P. Jonsson and J. Joshi and Jung, {A. W.} and A. Juste and E. Kajfasz and D. Karmanov and I. Katsanos and M. Kaur and R. Kehoe and S. Kermiche and N. Khalatyan and A. Khanov and A. Kharchilava and Kharzheev, {Y. N.} and I. Kiselevich and Kohli, {J. M.} and Kozelov, {A. V.} and J. Kraus and A. Kumar and A. Kupco and T. Kurča and Kuzmin, {V. A.} and S. Lammers and P. Lebrun and Lee, {H. S.} and Lee, {S. W.} and Lee, {W. M.} and X. Lei and J. Lellouch and D. Li and H. Li and L. Li and Li, {Q. Z.} and Lim, {J. K.} and D. Lincoln and J. Linnemann and Lipaev, {V. V.} and R. Lipton and H. Liu and Y. Liu and A. Lobodenko and M. Lokajicek and {Lopes De Sa}, R. and R. Luna-Garcia and Lyon, {A. L.} and Maciel, {A. K A} and R. Madar and R. Maga{\~n}a-Villalba and S. Malik and Malyshev, {V. L.} and J. Mansour and J. Mart{\'i}nez-Ortega and R. McCarthy and McGivern, {C. L.} and Meijer, {M. M.} and A. Melnitchouk and D. Menezes and Mercadante, {P. G.} and M. Merkin and A. Meyer and J. Meyer and F. Miconi and Mondal, {N. K.} and M. Mulhearn and E. Nagy and M. Narain and R. Nayyar and Neal, {H. A.} and Negret, {J. P.} and P. Neustroev and Nguyen, {H. T.} and T. Nunnemann and J. Orduna and N. Osman and J. Osta and A. Pal and N. Parashar and V. Parihar and Park, {S. K.} and R. Partridge and N. Parua and A. Patwa and B. Penning and M. Perfilov and Y. Peters and K. Petridis and G. Petrillo and P. P{\'e}troff and Pleier, {M. A.} and Podstavkov, {V. M.} and Popov, {A. V.} and M. Prewitt and D. Price and N. Prokopenko and J. Qian and A. Quadt and B. Quinn and Ratoff, {P. N.} and I. Razumov and I. Ripp-Baudot and F. Rizatdinova and M. Rominsky and A. Ross and C. Royon and P. Rubinov and R. Ruchti and G. Sajot and A. S{\'a}nchez-Hern{\'a}ndez and Sanders, {M. P.} and Santos, {A. S.} and G. Savage and M. Savitskyi and L. Sawyer and T. Scanlon and Schamberger, {R. D.} and Y. Scheglov and H. Schellman and M. Schott and C. Schwanenberger and R. Schwienhorst and J. Sekaric and H. Severini and E. Shabalina and V. Shary and S. Shaw and Shchukin, {A. A.} and V. Simak and P. Skubic and P. Slattery and D. Smirnov and Snow, {G. R.} and J. Snow and S. Snyder and S. S{\"o}ldner-Rembold and L. Sonnenschein and K. Soustruznik and J. Stark and Stoyanova, {D. A.} and M. Strauss and L. Suter and P. Svoisky and M. Titov and Tokmenin, {V. V.} and Tsai, {Y. T.} and D. Tsybychev and B. Tuchming and C. Tully and L. Uvarov and S. Uvarov and S. Uzunyan and {Van Kooten}, R. and {Van Leeuwen}, {W. M.} and N. Varelas and Varnes, {Erich W} and Vasilyev, {I. A.} and Verkheev, {A. Y.} and Vertogradov, {L. S.} and M. Verzocchi and M. Vesterinen and D. Vilanova and P. Vokac and Wahl, {H. D.} and Wang, {M. H L S} and J. Warchol and G. Watts and M. Wayne and J. Weichert and L. Welty-Rieger and Williams, {M. R J} and Wilson, {G. W.} and M. Wobisch and Wood, {D. R.} and Wyatt, {T. R.} and Y. Xie and R. Yamada and S. Yang and T. Yasuda and Yatsunenko, {Y. A.} and W. Ye and Z. Ye and H. Yin and K. Yip and Youn, {S. W.} and Yu, {J. M.} and J. Zennamo and Zhao, {T. G.} and B. Zhou and J. Zhu and M. Zielinski and D. Zieminska and L. Zivkovic",
year = "2015",
month = "9",
day = "22",
doi = "10.1103/PhysRevD.92.052007",
language = "English (US)",
volume = "92",
journal = "Physical review D: Particles and fields",
issn = "0556-2821",
publisher = "American Institute of Physics",
number = "5",

}

TY - JOUR

T1 - Simultaneous measurement of forward-backward asymmetry and top polarization in dilepton final states from tt ¯ production at the Tevatron

AU - Abazov, V. M.

AU - Abbott, B.

AU - Acharya, B. S.

AU - Adams, M.

AU - Adams, T.

AU - Agnew, J. P.

AU - Alexeev, G. D.

AU - Alkhazov, G.

AU - Alton, A.

AU - Askew, A.

AU - Atkins, S.

AU - Augsten, K.

AU - Avila, C.

AU - Badaud, F.

AU - Bagby, L.

AU - Baldin, B.

AU - Bandurin, D. V.

AU - Banerjee, S.

AU - Barberis, E.

AU - Baringer, P.

AU - Bartlett, J. F.

AU - Bassler, U.

AU - Bazterra, V.

AU - Bean, A.

AU - Begalli, M.

AU - Bellantoni, L.

AU - Beri, S. B.

AU - Bernardi, G.

AU - Bernhard, R.

AU - Bertram, I.

AU - Besançon, M.

AU - Beuselinck, R.

AU - Bhat, P. C.

AU - Bhatia, S.

AU - Bhatnagar, V.

AU - Blazey, G.

AU - Blessing, S.

AU - Bloom, K.

AU - Boehnlein, A.

AU - Boline, D.

AU - Boos, E. E.

AU - Borissov, G.

AU - Borysova, M.

AU - Brandt, A.

AU - Brandt, O.

AU - Brock, R.

AU - Bross, A.

AU - Brown, D.

AU - Bu, X. B.

AU - Buehler, M.

AU - Buescher, V.

AU - Bunichev, V.

AU - Burdin, S.

AU - Buszello, C. P.

AU - Camacho-Pérez, E.

AU - Casey, B. C K

AU - Castilla-Valdez, H.

AU - Caughron, S.

AU - Chakrabarti, S.

AU - Chan, K. M.

AU - Chandra, A.

AU - Chapon, E.

AU - Chen, G.

AU - Cho, S. W.

AU - Choi, S.

AU - Choudhary, B.

AU - Cihangir, S.

AU - Claes, D.

AU - Clutter, J.

AU - Cooke, M.

AU - Cooper, W. E.

AU - Corcoran, M.

AU - Couderc, F.

AU - Cousinou, M. C.

AU - Cuth, J.

AU - Cutts, D.

AU - Das, A.

AU - Davies, G.

AU - De Jong, S. J.

AU - De La Cruz-Burelo, E.

AU - Déliot, F.

AU - Demina, R.

AU - Denisov, D.

AU - Denisov, S. P.

AU - Desai, S.

AU - Deterre, C.

AU - Devaughan, K.

AU - Diehl, H. T.

AU - Diesburg, M.

AU - Ding, P. F.

AU - Dominguez, A.

AU - Dubey, A.

AU - Dudko, L. V.

AU - Duperrin, A.

AU - Dutt, S.

AU - Eads, M.

AU - Edmunds, D.

AU - Ellison, J.

AU - Elvira, V. D.

AU - Enari, Y.

AU - Evans, H.

AU - Evdokimov, A.

AU - Evdokimov, V. N.

AU - Fauré, A.

AU - Feng, L.

AU - Ferbel, T.

AU - Fiedler, F.

AU - Filthaut, F.

AU - Fisher, W.

AU - Fisk, H. E.

AU - Fortner, M.

AU - Fox, H.

AU - Fuess, S.

AU - Garbincius, P. H.

AU - Garcia-Bellido, A.

AU - García-González, J. A.

AU - Gavrilov, V.

AU - Geng, W.

AU - Gerber, C. E.

AU - Gershtein, Y.

AU - Ginther, G.

AU - Gogota, O.

AU - Golovanov, G.

AU - Grannis, P. D.

AU - Greder, S.

AU - Greenlee, H.

AU - Grenier, G.

AU - Gris, Ph

AU - Grivaz, J. F.

AU - Grohsjean, A.

AU - Grünendahl, S.

AU - Grünewald, M. W.

AU - Guillemin, T.

AU - Gutierrez, G.

AU - Gutierrez, P.

AU - Haley, J.

AU - Han, L.

AU - Harder, K.

AU - Harel, A.

AU - Hauptman, J. M.

AU - Hays, J.

AU - Head, T.

AU - Hebbeker, T.

AU - Hedin, D.

AU - Hegab, H.

AU - Heinson, A. P.

AU - Heintz, U.

AU - Hensel, C.

AU - Heredia-De La Cruz, I.

AU - Herner, K.

AU - Hesketh, G.

AU - Hildreth, M. D.

AU - Hirosky, R.

AU - Hoang, T.

AU - Hobbs, J. D.

AU - Hoeneisen, B.

AU - Hogan, J.

AU - Hohlfeld, M.

AU - Holzbauer, J. L.

AU - Howley, I.

AU - Hubacek, Z.

AU - Hynek, V.

AU - Iashvili, I.

AU - Ilchenko, Y.

AU - Illingworth, R.

AU - Ito, A. S.

AU - Jabeen, S.

AU - Jaffré, M.

AU - Jayasinghe, A.

AU - Jeong, M. S.

AU - Jesik, R.

AU - Jiang, P.

AU - Johns, Kenneth A

AU - Johnson, E.

AU - Johnson, M.

AU - Jonckheere, A.

AU - Jonsson, P.

AU - Joshi, J.

AU - Jung, A. W.

AU - Juste, A.

AU - Kajfasz, E.

AU - Karmanov, D.

AU - Katsanos, I.

AU - Kaur, M.

AU - Kehoe, R.

AU - Kermiche, S.

AU - Khalatyan, N.

AU - Khanov, A.

AU - Kharchilava, A.

AU - Kharzheev, Y. N.

AU - Kiselevich, I.

AU - Kohli, J. M.

AU - Kozelov, A. V.

AU - Kraus, J.

AU - Kumar, A.

AU - Kupco, A.

AU - Kurča, T.

AU - Kuzmin, V. A.

AU - Lammers, S.

AU - Lebrun, P.

AU - Lee, H. S.

AU - Lee, S. W.

AU - Lee, W. M.

AU - Lei, X.

AU - Lellouch, J.

AU - Li, D.

AU - Li, H.

AU - Li, L.

AU - Li, Q. Z.

AU - Lim, J. K.

AU - Lincoln, D.

AU - Linnemann, J.

AU - Lipaev, V. V.

AU - Lipton, R.

AU - Liu, H.

AU - Liu, Y.

AU - Lobodenko, A.

AU - Lokajicek, M.

AU - Lopes De Sa, R.

AU - Luna-Garcia, R.

AU - Lyon, A. L.

AU - Maciel, A. K A

AU - Madar, R.

AU - Magaña-Villalba, R.

AU - Malik, S.

AU - Malyshev, V. L.

AU - Mansour, J.

AU - Martínez-Ortega, J.

AU - McCarthy, R.

AU - McGivern, C. L.

AU - Meijer, M. M.

AU - Melnitchouk, A.

AU - Menezes, D.

AU - Mercadante, P. G.

AU - Merkin, M.

AU - Meyer, A.

AU - Meyer, J.

AU - Miconi, F.

AU - Mondal, N. K.

AU - Mulhearn, M.

AU - Nagy, E.

AU - Narain, M.

AU - Nayyar, R.

AU - Neal, H. A.

AU - Negret, J. P.

AU - Neustroev, P.

AU - Nguyen, H. T.

AU - Nunnemann, T.

AU - Orduna, J.

AU - Osman, N.

AU - Osta, J.

AU - Pal, A.

AU - Parashar, N.

AU - Parihar, V.

AU - Park, S. K.

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PY - 2015/9/22

Y1 - 2015/9/22

N2 - We present a simultaneous measurement of the forward-backward asymmetry and the top-quark polarization in tt¯ production in dilepton final states using 9.7fb-1 of proton-antiproton collisions at s=1.96TeV with the D0 detector. To reconstruct the distributions of kinematic observables we employ a matrix element technique that calculates the likelihood of the possible tt¯ kinematic configurations. After accounting for the presence of background events and for calibration effects, we obtain a forward-backward asymmetry of Att¯=(15.0±6.4(stat)±4.9(syst))% and a top-quark polarization times spin analyzing power in the beam basis of κP=(7.2±10.5(stat)±4.2(syst))%, with a correlation of -56% between the measurements. If we constrain the forward-backward asymmetry to its expected standard model value, we obtain a measurement of the top polarization of κP=(11.3±9.1(stat)±1.9(syst))%. If we constrain the top polarization to its expected standard model value, we measure a forward-backward asymmetry of Att¯=(17.5±5.6(stat)±3.1(syst))%. A combination with the D0 Att¯ measurement in the lepton+jets final state yields an asymmetry of Att¯=(11.8±2.5(stat)±1.3(syst))%. Within their respective uncertainties, all these results are consistent with the standard model expectations.

AB - We present a simultaneous measurement of the forward-backward asymmetry and the top-quark polarization in tt¯ production in dilepton final states using 9.7fb-1 of proton-antiproton collisions at s=1.96TeV with the D0 detector. To reconstruct the distributions of kinematic observables we employ a matrix element technique that calculates the likelihood of the possible tt¯ kinematic configurations. After accounting for the presence of background events and for calibration effects, we obtain a forward-backward asymmetry of Att¯=(15.0±6.4(stat)±4.9(syst))% and a top-quark polarization times spin analyzing power in the beam basis of κP=(7.2±10.5(stat)±4.2(syst))%, with a correlation of -56% between the measurements. If we constrain the forward-backward asymmetry to its expected standard model value, we obtain a measurement of the top polarization of κP=(11.3±9.1(stat)±1.9(syst))%. If we constrain the top polarization to its expected standard model value, we measure a forward-backward asymmetry of Att¯=(17.5±5.6(stat)±3.1(syst))%. A combination with the D0 Att¯ measurement in the lepton+jets final state yields an asymmetry of Att¯=(11.8±2.5(stat)±1.3(syst))%. Within their respective uncertainties, all these results are consistent with the standard model expectations.

UR - http://www.scopus.com/inward/record.url?scp=84943739654&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84943739654&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.92.052007

DO - 10.1103/PhysRevD.92.052007

M3 - Article

AN - SCOPUS:84943739654

VL - 92

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 0556-2821

IS - 5

M1 - 052007

ER -