Observation of Time-Reversal Violation in the B0 Meson
Author(s): Lees, JP; Poireau, V; Tisserand, V; Garra Tico, J; Grauges, E; et al
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http://arks.princeton.edu/ark:/88435/pr12h6k| Abstract: | Although CP violation in the B meson system has been well established by the B factories, there has been no direct observation of time reversal violation. The decays of entangled neutral B mesons into definite flavor states (B0 or B¯0), and J/ψK0S or cc¯K0S final states (referred to as B+ or B−), allow comparisons between the probabilities of four pairs of T-conjugated transitions, for example, B¯0→B− and B−→B¯0, as a function of the time difference between the two B decays. Using 468 million BB¯ pairs produced in Υ(4S) decays collected by the BABAR detector at SLAC, we measure T-violating parameters in the time evolution of neutral B mesons, yielding ΔS+T=−1.37±0.14(stat.)±0.06(syst.) and ΔS−T=1.17±0.18(stat.)±0.11(syst.). These nonzero results represent the first direct observation of T violation through the exchange of initial and final states in transitions that can only be connected by a T-symmetry transformation. |
| Publication Date: | Nov-2012 |
| Electronic Publication Date: | 19-Nov-2012 |
| Citation: | Lees, JP, Poireau, V, Tisserand, V, Garra Tico, J, Grauges, E, Palano, A, Eigen, G, Stugu, B, Brown, DN, Kerth, LT, Kolomensky, Yu G, Lynch, G, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, So, RY, Khan, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Kravchenko, EA, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Kirkby, D, Lankford, AJ, Mandelkern, M, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, West, CA, Eisner, AM, Kroseberg, J, Lockman, WS, Martinez, AJ, Schumm, BA, Seiden, A, Chao, DS, Cheng, CH, Echenard, B, Flood, KT, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Huard, Z, Meadows, BT, Sokoloff, MD, Sun, L, Bloom, PC, Ford, WT, Gaz, A, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Spaan, B, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, Playfer, S, Bettoni, D, Bozzi, C, Calabrese, R, Cibinetto, G, Fioravanti, E, Garzia, I, Luppi, E, Munerato, M, Piemontese, L, Santoro, V, Baldini-Ferroli, R, Calcaterra, A, de Sangro, R, Finocchiaro, G, Patteri, P, Peruzzi, IM, Piccolo, M, Rama, M, Zallo, A, Contri, R, Guido, E, Lo Vetere, M, Monge, MR, Passaggio, S, Patrignani, C, Robutti, E, Bhuyan, B, Prasad, V, Lee, CL, Morii, M, Edwards, AJ, Adametz, A, Uwer, U, Lacker, HM, Lueck, T, Dauncey, PD, Mallik, U, Chen, C, Cochran, J, Meyer, WT, Prell, S, Rubin, AE, Gritsan, AV, Guo, ZJ, Arnaud, N, Davier, M, Derkach, D, Grosdidier, G, Le Diberder, F, Lutz, AM, Malaescu, B, Roudeau, P, Schune, MH, Stocchi, A, Wormser, G, Lange, DJ, Wright, DM, Chavez, CA, Coleman, JP, Fry, JR, Gabathuler, E, Hutchcroft, DE, Payne, DJ, Touramanis, C, Bevan, AJ, Di Lodovico, F, Sacco, R, Sigamani, M, Cowan, G, Brown, DN, Davis, CL, Denig, AG, Fritsch, M, Gradl, W, Griessinger, K, Hafner, A, Prencipe, E, Barlow, RJ, Jackson, G, Lafferty, GD, Behn, E, Cenci, R, Hamilton, B, Jawahery, A, Roberts, DA, Dallapiccola, C, Cowan, R, Dujmic, D, Sciolla, G, Cheaib, R, Lindemann, D, Patel, PM, Robertson, SH, Biassoni, P, Neri, N, Palombo, F, Stracka, S, Cremaldi, L, Godang, R, Kroeger, R, Sonnek, P, Summers, DJ, Nguyen, X, Simard, M, Taras, P, De Nardo, G, Monorchio, D, Onorato, G, Sciacca, C, Martinelli, M, Raven, G, Jessop, CP, LoSecco, JM, Wang, WF, Honscheid, K, Kass, R, Brau, J, Frey, R, Sinev, NB, Strom, D, Torrence, E, Feltresi, E, Gagliardi, N, Margoni, M, Morandin, M, Pompili, A, Posocco, M, Rotondo, M, Simi, G, Simonetto, F, Stroili, R, Akar, S, Ben-Haim, E, Bomben, M, Bonneaud, GR, Briand, H, Calderini, G, Chauveau, J, Hamon, O, Leruste, Ph, Marchiori, G, Ocariz, J, Sitt, S, Biasini, M, Manoni, E, Pacetti, S, Rossi, A, Angelini, C, Batignani, G, Bettarini, S, Carpinelli, M, Casarosa, G, Cervelli, A, Forti, F, Giorgi, MA, Lusiani, A, Oberhof, B, Paoloni, E, Perez, A, Rizzo, G, Walsh, JJ, Lopes Pegna, D, Olsen, J, Smith, AJS, Telnov, AV, Anulli, F, Faccini, R, Ferrarotto, F, Ferroni, F, Gaspero, M, Li Gioi, L, Mazzoni, MA, Piredda, G, Bünger, C, Grünberg, O, Hartmann, T, Leddig, T, Schröder, H, Voss, C, Waldi, R, Adye, T, Olaiya, EO, Wilson, FF, Emery, S, Hamel de Monchenault, G, Vasseur, G, Yèche, Ch, Aston, D, Bard, DJ, Bartoldus, R, Benitez, JF, Cartaro, C, Convery, MR, Dorfan, J, Dubois-Felsmann, GP, Dunwoodie, W, Ebert, M, Field, RC, Franco Sevilla, M, Fulsom, BG, Gabareen, AM, Graham, MT, Grenier, P, Hast, C, Innes, WR, Kelsey, MH, Kim, P, Kocian, ML, Leith, DWGS, Lewis, P, Lindquist, B, Luitz, S, Luth, V, Lynch, HL, MacFarlane, DB, Muller, DR, Neal, H, Nelson, S, Perl, M, Pulliam, T, Ratcliff, BN, Roodman, A, Salnikov, AA, Schindler, RH, Snyder, A, Su, D, Sullivan, MK, Va’vra, J, Wagner, AP, Wisniewski, WJ, Wittgen, M, Wright, DH, Wulsin, HW, Young, CC, Ziegler, V, Park, W, Purohit, MV, White, RM, Wilson, JR, Randle-Conde, A, Sekula, SJ, Bellis, M, Burchat, PR, Miyashita, TS, Puccio, EMT, Alam, MS, Ernst, JA, Gorodeisky, R, Guttman, N, Peimer, DR, Soffer, A, Lund, P, Spanier, SM, Ritchie, JL, Ruland, AM, Schwitters, RF, Wray, BC, Izen, JM, Lou, XC, Bianchi, F, Gamba, D, Zambito, S, Lanceri, L, Vitale, L, Bernabeu, J, Martinez-Vidal, F, Oyanguren, A, Villanueva-Perez, P, Ahmed, H, Albert, J, Banerjee, Sw, Bernlochner, FU, Choi, HHF, King, GJ, Kowalewski, R, Lewczuk, MJ, Nugent, IM, Roney, JM, Sobie, RJ, Tasneem, N, Gershon, TJ, Harrison, PF, Latham, TE, Band, HR, Dasu, S, Pan, Y, Prepost, R, Wu, SL. (2012). Observation of Time-Reversal Violation in the B0 Meson. Physical Review Letters, 109 (21), 10.1103/PhysRevLett.109.211801 |
| DOI: | doi:10.1103/PhysRevLett.109.211801 |
| ISSN: | 0031-9007 |
| EISSN: | 1079-7114 |
| Pages: | 1 - 11 |
| Type of Material: | Journal Article |
| Journal/Proceeding Title: | Physical Review Letters |
| Version: | Author's manuscript |
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