Evidence for CP violation in B0-->J/psipi0 decays.

B. Aubert,M. Bona,Y Karyotakis,J.P. Lees,Poireau,E. Prencipe,X. Prudent,Tisserand,Jordi Garra Tico,E Graugés,L López,A. Palano,M. Pappagallo,G Eigen,Bjarne Stugu,L. Sun,G. S. Abrams,M. Battaglia,Dn Brown,J. Button-Shafer,Rn Cahn,R.G. Jacobsen,J. A. Kadyk,L.T. Kerth,Y.-U. G. Kolomensky,G. Kukartsev,G. Lynch,Ilya Osipenkov,M.T. Ronan,K. Tackmann,T. Tanabe,W. A. Wenzel,C. M. Hawkes,N. Soni,Alan Watson,H. Koch,Tamara Vazquez Schroeder,D. Walker,Dj Asgeirsson,T Çuhadar-Dönszelmann,B. G. Fulsom,C. Hearty,Ts Mattison,Ja Mckenna,M. Barrett,A. Khan,M Saleem,L. Teodorescu,Ve Blinov,A. D. Bukin,A. R. Buzykaev,Vp Druzhinin,Vb Golubev,Ap Onuchin,Si Serednyakov,Yuri Skovpen,Ep Solodov,Ky Todyshev,M Bondioli,S. Curry,I. Eschrich,D. Kirkby,Aj Lankford,P. Lund,M Mandelkern,E. C. Martin,Dp Stoker,S. Abachi,C Buchanan,J. W. Gary,F. Liu,O. Long,B.-C. Shen,Gm Vitug,Z. Yasin,Lijun Zhang,Sharma,C. Campagnari,Tm Hong,D. Kovalskyi,Ma Mazur,Jd Richman,Tw Beck,Am Eisner,Cj Flacco,Ca Heusch,J Kroseberg,Ws Lockman,T. Schalk,B.A. Schumm,A Seiden,L. S. Wang,M. G. Wilson,L. O. Winstrom,C. H. Cheng,Da Doll,B. Echenard,F. Fang,Dg Hitlin,I. Narsky,T. Piatenko,Fc Porter,R. Andreassen,G. Mancinelli,Bt Meadows,Kalanand Mishra,Sokoloff,Frederic Blanc,Pc Bloom,W.T. Ford,A. Gaz,Jf Hirschauer,A. Kreisel,Martin Nagel,U. Nauenberg,A Olivas,J.G. Smith,K. A. Ulmer,Wagner,R. Ayad,Am Gabareen,A. Soffer,Wh Toki,Rj Wilson,Dd Altenburg,E. Feltresi,A. Hauke,H Jasper,Moritz Karbach,J Merkel,A. Petzold,B. Spaan,K. Wacker,Klose,M. J. Kobel,Hm Lacker,Wf Mader,R. Nogowski,K. R. Schubert,R. Schwierz,J.E. Sundermann,A. Volk,D. Bernard,Gr Bonneaud,E. Latour,Thiebaux Ch,M. Verderi,P. J. Clark,W. Gradl,S. Playfer,Je Watson,M. Andreotti,D. Bettoni,C Bozzi,R. Calabrese,A. Cecchi,G. Cibinetto,P. Franchini,E. Luppi,Matteo Negrini,A. Petrella,L. Piemontese,Santoro,F. Anulli,R. Baldini-Ferroli,A. Calcaterra,de Sangro R,G. Finocchiaro,S. Pacetti,P. Patteri,Im Peruzzi,M. Piccolo,M. Rama,A. Zallo,A. Buzzo,R Contri,Lo Vetere M,M. M. Macri,M.R. Monge,Stefano Passaggio,C. Patrignani,Enrico Robutti,A. Santroni,S Tosi,Ks Chaisanguanthum,Masahiro Morii,Rs Dubitzky,J. Marks,S Schenk,U. Uwer,Dj Bard,P. D. Dauncey,J. A. Nash,Panduro Vazquez W,M. J. Tibbetts,P. K. Behera,X Chai,Mj Charles,Usha Mallik,james H cochran,Hb Crawley,L. Dong,Wt Meyer,S. Prell,Ei Rosenberg,Ae Rubin,Y.Y. Gao,A. V. Gritsan,Z. J. Guo,C. K. Lae,Ag Denig,M Fritsch,G Schott,N. Arnaud,J. Béquilleux,A D'Orazio,M.Davier,Da Costa Jf,G. Grosdidier,A. Höcker,Lepeltier,Le Diberder F,Am Lutz,S. Pruvot,P. Roudeau,M.-H. Schune,J. Serrano,Sordini,A. Stocchi,Wf Wang,G. Wormser,D. J. Lange,D. M. Wright,I Bingham,Jp Burke,Ca Chavez,Fry,E. Gabathuler,R. Gamet,D E Hutchcroft,D. J. Payne,C. Touramanis,A.J. Bevan,K. A. George,Di Lodovico F,R. Sacco,Michael Sigamani,G. Cowan,Hu Flaecher,Da Hopkins,Sudarshan Paramesvaran,F Salvatore,Ac Wren,Cl Davis,Ke Alwyn,Nr Barlow,Rj Barlow,Ym Chia,Cl Edgar,G. D. Lafferty,Tj West,J. I. Yi,J. Anderson,C. Chen,A. Jawahery,D. A. Roberts,G. Simi,J. M. Tuggle,Carlo Dallapiccola,S. S. Hertzbach,X. Li,E. Salvati,S Saremi,R Cowan,D Dujmic,Ph Fisher,Karsten Koeneke,G. Sciolla,M. Spitznagel,F.E. Taylor,Rk Yamamoto,M. Zhao,Se Mclachlin,P. M. Patel,S H Robertson,A. Lazzaro,Lombardo,F. Palombo,J. M. Bauer,L.M. Cremaldi,Eschenburg,R. Godang,R. Kroeger,D.A Sanders,D.J. Summers,Hw Zhao,S. Brunet,D. Cote,M. Simard,P. Taras,Fb Viaud,H. Nicholson,De Nardo G,L. Lista,D. Monorchio,C. Sciacca,M. A. Baak,G. Raven,H.L. Snoek,Cp Jessop,K. J. Knoepfel,J.M. LoSecco,Gabriele Benelli,La Corwin,K. Honscheid,Harris Kagan,R. D. Kass,Jp Morris,A.M. Rahimi,Jj Regensburger,S. J. Sekula,Qk Wong,Nl Blount,J.E. Brau,R. Frey,Olga Igonkina,J. A. Kolb,M. Lu,R. Rahmat,N.B. Sinev,D. M. Strom,J.F. Strube,Eric Torrence,G. Castelli,N. Gagliardi,Martino Margoni,M. Morandin,M. Posocco,M. Rotondo,Franco Simonetto,R. Stroili,C. Voci,del Amo Sanchez P,E. Ben-Haim,H. Briand,Giovanni Calderini,J. Chauveau,P. N. Y. David,Del Buono L,O. Hamon,Ph. Leruste,José Ocariz,A. Pérez,J. Prendki,L. Gladney,Maurizio Biasini,R. Covarelli,Elisa Manoni,Corrado Angelini,G. Batignani,S. Bettarini,M. Carpinelli,Alberto Cervelli,F Forti,M. A. Giorgi,A. Lusiani,Giovanni Marchiori,M. Morganti,N. Neri,E. Paoloni,G. Rizzo,John Walsh,Jed Biesiada,Lopes Pegna D,C. Lu,J Olsen,A. J. S. Smith,A.V Telnov,E. Baracchini,G. Cavoto,Del Re D,Di Marco E,R. Faccini,F. Ferrarotto,F. Ferroni,M. Gaspero,P. D. Jackson,Li Gioi L,M. A. Mazzoni,S. Morganti,G Piredda,Francesco Polci,F. Renga,C. Voena,M. Ebert,T. Hartmann,H. Schroder,R. Waldi,T. Adye,B. Franek,E. O. Olaiya,W. Roethel,F. F. Wilson,S. Emery,Marc Escalier,L Estève,A Gaidot,Sf Ganzhur,de Monchenault Gh,W Kozanecki,G. Vasseur,Yèche Ch,M. Zito,X. R. Chen,H. Liu,W. Park,Mv Purohit,Rm White,Wilson,Mt Allen,D. Aston,Rainer Bartoldus,Philip Bechtle,J.F. Benítez,R. Cenci,Jp Coleman,M. R. Convery,Jc Dingfelder,J. Dorfan,G.P. Dubois Felsmann,W. Dunwoodie,R. C. Field,S.J. Gowdy,Mt Graham,P. Grenier,C. Hast,Wr Innes,J. Kamiński,M. H. Kelsey,Hyunyong Kim,P. Kim,M. L. Kocian,Dwgs Leith,S Li,B. E. Lindquist,S Luitz,Luth,H. L. Lynch,Db Macfarlane,H. Marsiske,R Messner,D R Muller,H.A. Neal,S. Nelson,Cp O'Grady,I Ofte,A. Perazzo,M.L. Perl,Bn Ratcliff,A. Roodman,Aa Salnikov,Rh Schindler,J. Schwiening,A. Snyder,D. Su,Mk Sullivan,K. Suzuki,S. K. Swain,J. M. Thompson,J. Va  vra,A.P. Wagner,M. Weaver,C A West,Wj Wisniewski,M. Wittgen,Dh Wright,H. W. Wulsin,Ak Yarritu,K Yi,C. C. Young,Ziegler,Pr Burchat,Aj Edwards,Sa Majewski,Ts Miyashita,B. A. Petersen,L. Wilden,S Ahmed,M. S. Alam,R Bula,J. A. Ernst,B.Pan,Ma Saeed,Sb Zain,Sm Spanier,Bj Wogsland,R. Eckmann,Jl Ritchie,Am Rüland,Cj Schilling,R F Schwitters,Bw Drummond,J.M. Izen,X. C. Lou,S Ye,F. Bianchi,D. Gamba,Mario Pelliccioni,M Bomben,L. Bosisio,C. Cartaro,Della Ricca G,L Lanceri,L Vitale,Azzolini,N. Lopez-March,F. Martinez-Vidal,D. A. Milanes,A. Oyanguren,J. Albert,S. Banerjee,B. Bhuyan,H.H.F. Choi,Kenji Hamano,R. Kowalewski,Mj Lewczuk,I.M. Nugent,Jm Roney,R.J. Sobie,T.J. Gershon,P. F. Harrison,J. Ilic,Te Latham,G.B. Mohanty,Hr Band,Xie Chen,S. Dasu,Kt Flood,Y.-B. Pan,M Pierini,R. Prepost,Co Vuosalo,S.L. Wu

Evidence for CP violation in B0-->J/psipi0 decays.

2008

Author(s): Aubert, B; Bona, M; Karyotakis, Y; Lees, JP; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V; Tico, JG; Grauges, E; Lopez, L; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Abrams, GS; Battaglia, M; Brown, DN; Button-Shafer, J; Cahn, RN; Jacobsen, RG; Kadyk, JA; Kerth, LT; Kolomensky, YG; Kukartsev, G; Lynch, G; Osipenkov, IL; Ronan, MT; Tackmann, K; Tanabe, T; Wenzel, WA; Hawkes, CM; Soni, N; Watson, AT; Koch, H; Schroeder, T; Walker, D; Asgeirsson, DJ; Cuhadar-Donszelmann, T; Fulsom, BG; Hearty, C; Mattison, TS; McKenna, JA; Barrett, M; Khan, A; Saleem, M; Teodorescu, L; Blinov, VE; Bukin, AD; Buzykaev, AR; Druzhinin, VP; Golubev, VB; Onuchin, AP; Serednyakov, SI; Skovpen, YI; Solodov, EP; Todyshev, KY; Bondioli, M; Curry, S; Eschrich, I; Kirkby, D; Lankford, AJ; Lund, P; Mandelkern, M; Martin, EC; Stoker, DP; Abachi, S; Buchanan, C; Gary, JW; Liu, F; Long, O; Shen, BC; Vitug, GM; Yasin, Z; Zhang, L; Sharma, V; Campagnari, C; Hong, TM; Kovalskyi, D; Mazur, MA; Richman, JD; Beck, TW; Eisner, AM; Flacco, CJ | Abstract: We present measurements of the branching fraction and time-dependent CP asymmetries in B0→J/ψπ0 decays based on 466×106 Υ(4S)→BB events collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. We measure the CP asymmetry parameters S=-1.23±0.21(stat)±0.04(syst) and C=-0.20±0.19(stat) ±0.03(syst), where the measured value of (S, C) is 4.0 standard deviations from (0, 0) including systematic uncertainties. The branching fraction is determined to be B(B0→J/ψπ0)=[1.69±0.14(stat) ±0.07(syst)]×10-5. © 2008 The American Physical Society.

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