Measurement of the forward-backward asymmetry of top-quark and antiquark pairs using the full CDF Run II data set

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Aaltonen, T, Amerio, S, Amidei, D, Anastassov, A, Annovi, A, Antos, J, Apollinari, G, Appel, JA, Arisawa, T, Artikov, A et al (show 386 more authors) , Asaadi, J, Ashmanskas, W, Auerbach, B, Aurisano, A, Azfar, F, Badgett, W, Bae, T, Barbaro-Galtieri, A, Barnes, VE, Barnett, BA, Barria, P, Bartos, P, Bauce, M, Bedeschi, F, Behari, S, Bellettini, G, Bellinger, J, Benjamin, D, Beretvas, A, Bhatti, A, Bland, KR, Blumenfeld, B, Bocci, A, Bodek, A, Bortoletto, D, Boudreau, J, Boveia, A, Brigliadori, L, Bromberg, C, Brucken, E, Budagov, J, Budd, HS, Burkett, K, Busetto, G, Bussey, P, Butti, P, Buzatu, A, Calamba, A, Camarda, S, Campanelli, M, Canelli, F, Carls, B, Carlsmith, D, Carosi, R, Carrillo, S, Casal, B, Casarsa, M, Castro, A, Catastini, P, Cauz, D, Cavaliere, V, Cerri, A, Cerrito, L, Chen, YC, Chertok, M, Chiarelli, G, Chlachidze, G, Cho, K, Chokheli, D, Clark, A, Clarke, C, Convery, ME, Conway, J, Corbo, M, Cordelli, M, Cox, CA, Cox, DJ, Cremonesi, M, Cruz, D, Cuevas, J, Culbertson, R, d'Ascenzo, N, Datta, M, de Barbaro, P, Demortier, L, Deninno, M, D'Errico, M, Devoto, F, Di Canto, A, Di Ruzza, B, Dittmann, JR, Donati, S, D'Onofrio, M ORCID: 0000-0003-2408-5099, Dorigo, M, Driutti, A, Ebina, K, Edgar, R, Erbacher, R, Errede, S, Esham, B, Farrington, S, Fernandez Ramos, JP, Field, R, Flanagan, G, Forrest, R, Franklin, M, Freeman, JC, Frisch, H, Funakoshi, Y, Galloni, C, Garfinkel, AF, Garosi, P, Gerberich, H, Gerchtein, E, Giagu, S, Giakoumopoulou, V, Gibson, K, Ginsburg, CM, Giokaris, N, Giromini, P, Glagolev, V, Glenzinski, D, Gold, M, Goldin, D, Golossanov, A, Gomez, G, Gomez-Ceballos, G, Goncharov, M, Gonzalez Lopez, O, Gorelov, I, Goshaw, AT, Goulianos, K, Gramellini, E, Grosso-Pilcher, C, da Costa, J Guimaraes, Hahn, SR, Han, JY, Happacher, F, Hara, K, Hare, M, Harr, RF, Harrington-Taber, T, Hatakeyama, K, Hays, C, Heinrich, J, Herndon, M, Hocker, A, Hong, Z, Hopkins, W, Hou, S, Hughes, RE, Husemann, U, Hussein, M, Huston, J, Introzzi, G, Iori, M, Ivanov, A, James, E, Jang, D, Jayatilaka, B, Jeon, EJ, Jindariani, S, Jones, M, Joo, KK, Jun, SY, Junk, TR, Kambeitz, M, Kamon, T, Karchin, PE, Kasmi, A, Kato, Y, Ketchum, W, Keung, J, Kilminster, B, Kim, DH, Kim, HS, Kim, JE, Kim, MJ, Kim, SH, Kim, SB, Kim, YJ, Kim, YK, Kimura, N, Kirby, M, Kondo, K, Kong, DJ, Konigsberg, J, Kotwal, AV, Kreps, M, Kroll, J, Kruse, M, Kuhr, T, Kurata, M, Laasanen, AT, Lammel, S, Lancaster, M, Lannon, K, Latino, G, Lee, HS, Lee, JS, Leo, S, Leone, S, Lewis, JD, Limosani, A, Lipeles, E, Lister, A, Liu, Q, Liu, T, Lockwitz, S, Loginov, A, Lucchesi, D, Luca, A, Lueck, J, Lujan, P, Lukens, P, Lungu, G, Lys, J, Lysak, R, Madrak, R, Maestro, P, Malik, S, Manca, G, Manousakis-Katsikakis, A, Marchese, L, Margaroli, F, Marino, P, Matera, K, Mattson, ME, Mazzacane, A, Mazzanti, P, McNulty, R, Mehta, A ORCID: 0000-0003-2619-9743, Mehtala, P, Mesropian, C, Miao, T, Mietlicki, D, Mitra, A, Miyake, H, Moed, S, Moggi, N, Moon, CS, Moore, R, Morello, MJ, Mukherjee, A, Muller, Th, Murat, P, Mussini, M, Nachtman, J, Nagai, Y, Naganoma, J, Nakano, I, Napier, A, Nett, J, Nigmanov, T, Nodulman, L, Noh, SY, Norniella, O, Oakes, L, Oh, SH, Oh, YD, Okusawa, T, Orava, R, Ortolan, L, Pagliarone, C, Palencia, E, Palni, P, Papadimitriou, V, Parker, W, Pauletta, G, Paulini, M, Paus, C, Phillips, TJ, Piacentino, G, Pianori, E, Pilot, J, Pitts, K, Plager, C, Pondrom, L, Poprocki, S, Potamianos, K, Pranko, A, Prokoshin, F, Ptohos, F, Punzi, G, Redondo Fernandez, I, Renton, P, Rescigno, M, Rimondi, F, Ristori, L, Robson, A, Rodriguez, T, Rolli, S, Ronzani, M, Roser, R, Rosner, JL, Ruffini, F, Ruiz, A, Russ, J, Rusu, V, Sakumoto, WK, Sakurai, Y, Santi, L, Sato, K, Saveliev, V, Savoy-Navarro, A, Schlabach, P, Schmidt, EE, Schwarz, T, Scodellaro, L, Scuri, F, Seidel, S, Seiya, Y, Semenov, A, Sforza, F, Shalhout, SZ, Shears, T ORCID: 0000-0002-2653-1366, Shepard, PF, Shimojima, M, Shochet, M, Shreyber-Tecker, I, Simonenko, A, Sliwa, K, Smith, JR, Snider, FD, Song, H, Sorin, V, St Denis, R, Stancari, M, Stentz, D, Strologas, J, Sudo, Y, Sukhanov, A, Suslov, I, Takemasa, K, Takeuchi, Y, Tang, J, Tecchio, M, Teng, PK, Thom, J, Thomson, E, Thukral, V, Toback, D, Tokar, S, Tollefson, K, Tomura, T, Tonelli, D, Torre, S, Torretta, D, Totaro, P, Trovato, M, Ukegawa, F, Uozumi, S, Vazquez, F, Velev, G, Vellidis, C, Vernieri, C, Vidal, M, Vilar, R, Vizan, J, Vogel, M, Volpi, G, Wagner, P, Wallny, R, Wang, SM, Waters, D, Wester, WCIII, Whiteson, D, Wicklund, AB, Wilbur, S, Williams, HH, Wilson, JS, Wilson, P, Winer, BL, Wittich, P, Wolbers, S, Wolfe, H, Wright, T, Wu, X, Wu, Z, Yamamoto, K, Yamato, D, Yang, T, Yang, UK, Yang, YC, Yao, W-M, Yeh, GP, Yi, K, Yoh, J, Yorita, K, Yoshida, T, Yu, GB, Yu, I, Zanetti, AM, Zeng, Y, Zhou, C and Zucchelli, S (2016) Measurement of the forward-backward asymmetry of top-quark and antiquark pairs using the full CDF Run II data set. PHYSICAL REVIEW D, 93 (11). 112005-.

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Abstract

We measure the forward--backward asymmetry of the production of top quark and antiquark pairs in proton-antiproton collisions at center-of-mass energy $\sqrt{s} = 1.96~\mathrm{TeV}$ using the full data set collected by the Collider Detector at Fermilab (CDF) in Tevatron Run II corresponding to an integrated luminosity of $9.1~\rm{fb}^{-1}$. The asymmetry is characterized by the rapidity difference between top quarks and antiquarks ($\Delta y$), and measured in the final state with two charged leptons (electrons and muons). The inclusive asymmetry, corrected to the entire phase space at parton level, is measured to be $A_{\text{FB}}^{t\bar{t}} = 0.12 \pm 0.13$, consistent with the expectations from the standard-model (SM) and previous CDF results in the final state with a single charged lepton. The combination of the CDF measurements of the inclusive $A_{\text{FB}}^{t\bar{t}}$ in both final states yields $A_{\text{FB}}^{t\bar{t}}=0.160\pm0.045$, which is consistent with the SM predictions. We also measure the differential asymmetry as a function of $\Delta y$. A linear fit to $A_{\text{FB}}^{t\bar{t}}(|\Delta y|)$, assuming zero asymmetry at $\Delta y=0$, yields a slope of $\alpha=0.14\pm0.15$, consistent with the SM prediction and the previous CDF determination in the final state with a single charged lepton. The combined slope of $A_{\text{FB}}^{t\bar{t}}(|\Delta y|)$ in the two final states is $\alpha=0.227\pm0.057$, which is $2.0\sigma$ larger than the SM prediction.

Item Type:	Article
Additional Information:	To be submitted to Phys. Rev. D
Uncontrolled Keywords:	hep-ex, hep-ex
Depositing User:	Symplectic Admin
Date Deposited:	15 Jan 2019 09:41
Last Modified:	19 Jan 2023 01:06
DOI:	10.1103/PhysRevD.93.112005
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3031272

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• Measurement of the forward-backward asymmetry of top-quark and antiquark pairs using the full CDF Run II data set. (deposited 27 Jul 2016 13:45)
  • Measurement of the forward-backward asymmetry of top-quark and antiquark pairs using the full CDF Run II data set. (deposited 15 Jan 2019 09:41) [Currently Displayed]