Title: | Study of time-dependent CP-violating asymmetries and flavor oscillations in neutral B decays at the ϒ(4S) |
Authors: | Aubert, B Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Palano, A Pompili, A Chen, GP Giraud, PF Wenzel, WA de Monchenault, GH Kozanecki, W Langer, M Azzopardi, DE London, GW Mayer, B Wilson, MG Taras, P Bettarini, S Breon, AB Serfass, B Vasseur, G Yeche, C Zito, M Purohit, MV Harrison, TJ Back, JJ Singh, H Weidemann, AW Bondioli, M Playfer, S Yumiceva, FX Adam, I de Sangro, R Chen, E Aston, D Berger, N Boyarski, AM Calderini, G Bellodi, G Bucci, F Convery, MR Payne, DJ Coupal, DP Hawkes, CM Dong, D Dorfan, J Falciai, D Dunwoodie, W Dubois-Felsmann, GP Field, RC Campagna, E Glanzman, T Groysman, Y Kral, JF Gowdy, S Haas, T Halyo, V Himel, T Hryn'ova, T Knowles, DJ Finocchiaro, G Carpinelli, M Huffer, ME Innes, WR Dvoretskii, A Nicholson, H Dixon, P Jessop, C Kelsey, MH Kim, P Kocian, ML Langenegger, U Bozzi, C Leith, DWGS Luitz, S Patteri, P Luth, V Cartaro, C O'Neale, SW Harrison, PF Lynch, HL Rong, G Marsiske, H Forti, F Menke, S Messner, R Muller, DR O'Grady, CP Ozcan, VE Cavallo, N Peruzzi, IM Perazzo, A Vasileiadis, G Perl, M Giorgi, MA Petrak, S Penny, RC Hitlin, DG Quinn, H Ratcliff, BN Robertson, SH De Nardo, G Roodman, A Salnikov, AA Piccolo, M Roe, NA Lu, A Schietinger, T Schindler, RH Schwiening, J Snyder, A Soha, A Metzler, S Fabozzi, F Watson, AT Spanier, SM Eschrich, I Stelzer, J Su, D Potter, RJL Xie, Y Sullivan, MK Tanaka, HA Va'vra, J Wagner, SR Gatto, C Weinstein, AJR Cremaldi, L Wisniewski, WJ Oyang, J Wright, DH Watson, NK Shorthouse, HW Young, CC Zallo, A Burchat, PR Cheng, CH Grothe, M Schmitz, RE Meyer, TI Roat, C Henderson, R Bugg, W Cohn, H Porter, FC Strother, P Izen, JM Kitayama, I Bagnasco, S Lusiani, A Lista, L Deppermann, T Lou, XC Bianchi, F Bona, M Gamba, D Bosisio, L Della Ricca, G Vidal, PB Dittongo, S Marchiori, G Ryd, A Paolucci, P Lanceri, L Sharma, V Poropat, P Vuagnin, G Goetzen, K Panvini, RS Brown, CM Jackson, PD Martinez-Vidal, F Cowan, G Kowalewski, R Sloane, RJ Roney, JM Band, HR Samuel, A Buzzo, A Charles, E Dasu, S Eichenbaum, AM Morganti, M Hu, H Koch, H George, S Borgland, AW Johnson, JR Liu, R Di Lodovico, F Pan, Y Prepost, R Brown, DN Neri, N Weaver, M Scott, IJ Sekula, SJ von Wimmersperg-Toeller, JH Piccolo, D Green, MG Wu, SL Yu, Z Kunze, M Kordich, TMB Paoloni, E Neal, H BABAR Collaboration Contri, R Lewandowski, B Yang, S Sciacca, C Peters, K Kurup, A Schmuecker, H Steinke, M Piemontese, L Barlow, NR Bhimji, W Chevalier, N Clark, PJ Cottingham, WN Crosetti, G LeClerc, C Foster, B Mackay, C Jacobsen, RG Rama, M Zhu, RY Wilson, FF Abe, K Hearty, C Mattison, TS McKenna, JA Thiessen, D LoSecco, JM Jolly, S Lo Vetere, M Rizzo, G McKemey, AK Verderi, M Blinov, VE Bukin, AD Devmal, S Bukin, DA Buzykaev, AR Golubev, VB Alsmiller, JRG Ivanchenko, VN Eschenburg, V Korol, AA Kravchenko, EA Macri, M Marker, CE Onuchin, AP Serednyakov, SI Skovpen, YI Telnov, VI Wang, P Gabriel, TA Long, O Yushkov, AN Best, D Chao, M Kirkby, D Lankford, AJ Chen, JC Monge, MR Mandelkern, M McMahon, S Stoker, DP Sandrelli, F Brau, J Arisaka, K Buchanan, C Geld, TL Chun, S MacFarlane, DB Prell, S McGrath, P Jayatilleke, S Passaggio, S Simi, G Mancinelli, G Frey, R Meadows, BT Sokoloff, MD Barillari, T Bloom, P Dima, MO Ford, WT Nauenberg, U McMahon, TR Schumm, BA Zhu, YS Olivas, A Heusch, CA Pastore, FC Rankin, P Roy, J Smith, JG van Hoek, WC Blouw, J Harton, JL Romosan, A Krishnamurthy, M Ricciardi, S Soffer, A Touramanis, C Toki, WH Eigen, G Patrignani, C Wilson, RJ Zhang, J Brandt, T Triggiani, G Brose, J Colberg, T Dickopp, M Salvatore, F Grauges, E Dubitzky, RS Hauke, A Maly, E Muller-Pfefferkorn, R Campagnari, C Walsh, J Stugu, B Otto, S Schubert, KR Schwierz, R Spaan, B Rahatlou, S Vaitsas, G Wilden, L Bernard, D Bonneaud, GR Haire, M Brochard, F Cohen-Tanugi, J Pia, MG Ferrag, S Abrams, GS T'Jampens, S Iwasaki, M Robutti, E Brown, D Button-Shafer, J Judd, D Santroni, A Tosi, S Morii, M Bartoldus, R Hamilton, R Mallik, U Cochran, J Sinev, NB Dahmes, B Crawley, HB Treadwell, E Davis, CL Fischer, PA Lamsa, J Cahn, RN Meyer, WT Rosenberg, EI Grosdidier, G Hast, C Strom, D Hocker, A Kroeger, R Lacker, HM Hart, PA Allison, J Laplace, S Lepeltier, V Lutz, AM Plaszczynski, S Clark, AR Schune, MH Colecchia, F Paick, K Trincaz-Duvoid, S Wormser, G Bionta, RM Brigljevic, V Anjomshoaa, A Kuznetsova, N Lange, D Mugge, M van Bibber, K Wright, DM Thiebaux, C Levi, ME Bevan, AJ Gill, MS Fry, JR Gabathuler, E Gamet, R Barlow, RJ George, M Levy, SL Kay, M Turnbull, L Kadel, RW Dal Corso, F Mazur, MA Boyd, JT Forti, AC Fullwood, J Jackson, F Lafferty, GD Savvas, N Weatherall, JH Wagoner, DE Bernet, R Williams, JC Dorigo, A Farbin, A Jawahery, A Richman, JD Kadyk, J Lillard, V Olsen, J Roberts, DA Albert, J Schieck, JR Blaylock, G Khan, A Galeazzi, F Dallapiccola, C Flood, K Hertzbach, SS Kofler, R Verkerke, W Koptchev, VB Elmer, P Kerth, LT Moore, TB Staengle, H Willocq, S Aspinwall, ML Lavin, D Brau, B Cowan, R Sciolla, G Taylor, F Seiden, A Yamamoto, RK Beringer, J Milek, M Patel, PM Kolomensky, YG Margoni, M Palombo, F Muheim, F Bauer, JM Lockman, WS Lu, C Swain, JE Michelon, G Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Lynch, G Bowerman, DA Torassa, E Ronan, MT Voci, C Benayoun, M Tinslay, J Pulliam, T Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Gritsan, AV Miftakov, V Hamon, O Le Diberder, F Oddone, PJ Leruste, P Falbo, M Ocariz, J Schalk, T Roos, L Stark, J Manfredi, PF Reidy, J Dauncey, PD Re, V Speziali, V Frank, ED Gladney, L Guo, QH Borean, C Pripstein, M Panetta, J Qi, ND Schaffner, SF Angelini, C Egede, U Batignani, G Anulli, F Gunawardane, NJW Smith, AJS Tumanov, A Varnes, EW Cavoto, G del Re, D Ferrarotto, F Turri, M Sanders, DA Ferroni, F Lamanna, E Shelkov, VG Nash, JA Baldini-Ferroli, R Mazzoni, MA Morganti, S Piredda, G Tehrani, FS Serra, M Eisner, AM Voena, C Faccini, R Walkowiak, W Christ, S Sanders, P Waldi, R Calcaterra, A Adye, T Telnov, AV De Groot, N Summers, DJ Franek, B Geddes, NI Gopal, GP Xella, SM Aleksan, R Smith, D Williams, DC Emery, S Raven, G Gaidot, A Nief, JY Ganzhur, SF |
Issue Date: | 2002 |
Publisher: | American Physical Society |
Citation: | Physical Review D, 66(3): Artn 032003, Aug 2002 |
Abstract: | We present a measurement of time-dependent CP-violating asymmetries in neutral B meson decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at the Stanford Linear Accelerator Center. The data sample consists of 29.7 fb-1 recorded at the Υ(4S) resonance and 3.9 fb-1 off resonance. One of the neutral B mesons, which are produced in pairs at the Υ(4S), is fully reconstructed in the CP decay modes J/ψKS0, ψ(2S)KS0, χc1KS0, J/ψK*0 (K*0→KS0π0) and J/ψKL0, or in flavor-eigenstate modes involving D(*)π/ρ/a1 and J/ψK*0 (K*0→K+π-). The flavor of the other neutral B meson is tagged at the time of its decay, mainly with the charge of identified leptons and kaons. A neural network tagging algorithm is used to recover events without a clear lepton or kaon tag. The proper time elapsed between the decays is determined by measuring the distance between the decay vertices. Wrong-tag probabilities, the time-difference resolution function, and the B0-B0 oscillation frequency Δmd are measured with a sample of about 6350 fully-reconstructed B0 decays in hadronic flavor-eigenstate modes. A maximum-likelihood fit to this flavor eigenstate sample finds Δmd=0.516±0.016(stat)±0.010(syst)ps-1. The value of the asymmetry amplitude sin2β is determined from a simultaneous maximum-likelihood fit to the time-difference distribution of the flavor-eigenstate sample and about 642 tagged B0 decays in the CP-eigenstate modes. We find sin2β=0.59±0.14(stat)±0.05(syst), demonstrating that CP violation exists in the neutral B meson system. We also determine the value of the CP violation parameter |λ|=0.93±0.09(stat)±0.03(syst), which is consistent with the expectation of |λ|=1 for no direct CP violation. |
Description: | This is the pre-print version of the Article. The official published version can be accessed from the links below. Copyright @ 2002 APS |
URI: | http://prd.aps.org/abstract/PRD/v66/i3/e032003 http://bura.brunel.ac.uk/handle/2438/7539 |
DOI: | http://dx.doi.org/10.1103/PhysRevD.66.032003 |
ISSN: | 0556-2821 |
Appears in Collections: | Electronic and Electrical Engineering Dept of Electronic and Electrical Engineering Research Papers
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