Observation ofCPViolation inB0→K+π−andB0→π+π−

B Aubert,M B Nikolich,D A Roberts,U Uwer,M Morii,A V Gritsan,T Adye,I M Peruzzi,G Piredda,M Morganti,D Del Re,R Kass,R Waldi,A P Wagner,A V Telnov,N Arnaud,J Béquilleux,J Cochran,X R Chen,R Godang,A M Gabareen,P R Burchat,G Sciolla,M Bondioli,E Torrence,P D Jackson,G S Abrams,M R Convery,K Mishra,A Oyanguren,W Roethel,E Ben-Haim,B Dahmes,F F Wilson,J M Izen,S Pruvot,B Lewandowski,I M Nugent,G P Dubois-Felsmann,H W Zhao,A D Bukin,J R Fry,J R Wilson,K Honscheid,R C Field,S Pacetti,R Frey,L Vitale,J Strube,C C Young,E Manoni,M T Allen,M Rama,G Vasseur,A M Rahimi,B Bhuyan,M Krishnamurthy,F Palombo,W Bugg,D Lopes Pegna,E Baracchini,D J Bard,M Wittgen,L Bosisio,G Raven,D N Brown,D G Hitlin,A Cervelli,G Eigen,Yu G Kolomensky,P J Clark,F R Wappler,L T Kerth,G Rizzo,M R Monge,M Posocco,I Ofte,D B Macfarlane,W F Mader,F B Viaud,C Hearty,H Jasper,A Hauke,A I Robertson,S Playfer,R Cenci,F Simonetto,M Biasini,M T Ronan,C M Hawkes,H Kim,W S Lockman,G Kukartsev,H U Flaecher,R De Sangro,E Luppi,C Touramanis,P Grenier,J Schubert,B Stugu,S Brunet,J P Coleman,M Mandelkern,C K Lae,M T Graham,M Verderi,R Aleksan,M Zito,J Serrano,S Schenk,P Del Amo Sanchez,A J Lankford,H R Band,O Igonkina,N B Sinev,I Eschrich,H Kagan,L Sun,H Koch,G Blaylock,F Winklmeier,C P O’Grady,D Gamba,J Wu,J D Richman,D A Sanders,H L Snoek,D Kovalskyi,F Anulli,C Bozzi,T J Orimoto,M Morandin,O Hamon,G Batignani,C J Schilling,R Claus,Q K Wong,R J Wilson,T Held,G Schott,A Soffer,B Spaan,Y P Lau,P David,X Chai,N T Meyer,M A Baak,C L Davis,F Liu,L Teodorescu,S Saremi,A Calcaterra,V Sharma,P F Harrison,J Kroseberg,S Chen,J J Back,L Del Buono,A J Edwards,A Seiden,F Taylor,W R Innes,Z J Guo,J Biesiada,R Covarelli,M Pelizaeus,S Bettarini,M Fritsch,C Dallapiccola,F Ferrarotto,C Chen,A M Eisner,J J Hollar,A J Bevan,M Gaspero,H Schröder,S E Mclachlin,D Walker,Y Groysman,M D Sokoloff,J Anderson,P Kim,R Calabrese,F C Porter,R F Schwitters,S K Swain,M A Mazzoni,M Carpinelli,J Dorfan,Yu I Skovpen,P M Patel,P Lund,S H Robertson,I J Forster,P C Bloom,M Lu,R Nogowski,J I Yi,K A George,E Chen,E Prencipe,R Stroili,A M Ruland,V E Blinov,W N Cottingham,D Kirkby,M Bomben,F Di Lodovico,G Della Ricca,R Baldini-Ferroli,H Marsiske,K Hamano,M Margoni,M Andreotti,S Ye,K Wacker,N R Barlow,C J Flacco,X C Lou,P E Kutter,N A Roe,R Kowalewski,F Bianchi,S Abachi,A Perazzo,R Rahmat,V Jain,S Tosi,A Stocchi,D H Wright,D J Asgeirsson,W Kozanecki,A Volk,X Chen,T W Beck,E P Solodov,S B Zain,Z Yu,T S Mattison,C H Cheng,M Saleem,P Bechtle,J M Losecco,T B Moore,P H Fisher,C P Jessop,J Olsen,W A Wenzel,D A Hopkins,S J Sekula,G Cibinetto,V Klose,S J Gowdy,S Ricciardi,R Gamet,K A Ulmer,I Narsky,R K Yamamoto,U Nauenberg,S F Ganzhur,G Grosdidier,A Gaidot,C Cartaro,T Schalk,B L Hartfiel,A Zghiche,F Bellini,C Hast,P K Behera,K Tackmann,J Stelzer,R Eckmann,F Polci,R Schwierz,K S Chaisanguanthum,F Salvatore,F Forti,M A Mazur,M Pierini,D Bettoni,M H Schune,E I Rosenberg,E Salvati,F Fang,J Ocariz,A Petrella,C L Edgar,N L Blount,V Santoro,T Hryn’Ova,E Latour,G R Bonneaud,R L Flack,D J Payne,L Wilden,X Li,A Pompili,N Van Bakel,J W Berryhill,A Snyder,J A Mckenna,A Zallo,J Allison,W T Meyer,F Gallo,D Monorchio,D M Wright,B A Petersen,K Suzuki,B N Ratcliff,S Emery,E O Olaiya,E C Martin,V Sordini,O Long,S Dasu,P Taras,S I Serednyakov,M A Giorgi,G Benelli,G Cavoto,A Cecchi,N Berger,S S Hertzbach,J A Kadyk,A Höcker,C Buchanan,J P Lees,H Briand,V Poireau,M Battaglia,V Lepeltier,A Kreisel,V Eschenburg,J Va’Vra,H Nicholson,R Kroeger,A Jawahery,R Prepost,S D Foulkes,G Mancinelli,A M Lutz,A T Watson,H Liu,L A Corwin,S Prell,E Feltresi,B G Fulsom,K K Gan,A Cunha,P Roudeau,J W Gary,D W G S Leith,R Bartoldus,S Ahmed,J Marks,V Ziegler,T R Mcmahon,B Franek,A Olivas,C A Chavez,J M Tuggle,D Strom,A Petzold,G B Mohanty,S Rodier,G Calderini,V Lombardo,T Piatenko,D D Altenburg,M A Saeed,R J Barlow,E Robutti,M Negrini,J G Smith,A E Rubin,S Curry,G Hamel De Monchenault,P Franchini,P D Dauncey,D P Stoker,J M Thompson,J P Morris,U Mallik,W F Wang,F Fabozzi,V Azzolini,H B Crawley,Y Karyotakis,L Li Gioi,M Escalier,J Zhang,R S Dubitzky,D Boutigny,R N Cahn,V Tisserand,W T Ford,M Weaver,M Pappagallo,G Simi,G Wormser,V Eyges,A Gaz,M Nagel,A Lusiani,C Campagnari,M Lo Vetere,G Marchiori,E Paoloni,M H Kelsey,C Voena,S Luitz,G D Lafferty,D C Williams,L Lista,D J Summers,A Buzzo,F Blanc,T J West,L Zhang,W Dunwoodie,J Schwiening,M Pripstein,J Chauveau,A J S Smith,P Elmer,R Faccini,M Simard,A Khan,A Lazzaro,L Lopez,R G Jacobsen,D J Lange,N S Knecht,J Merkel,F Muheim,S Rahatlou,M G Wilson,K R Schubert,K T Flood,G Castelli,B C Shen,N Gagliardi,D Bernard,A Roodman,T Brandt,S Li,S R Wagner,A C Wren,H L Lynch,A A Salnikov,S Morganti,C Sciacca,L M Mir,N Neri,M Rotondo,W Gradl,J M Roney,L Lanceri,A K Yarritu,W Menges,R Ter-Antonyan,L Piemontese,G De Nardo,A Santroni,L Cremaldi,G Cowan,M Spitznagel,M Piccolo,K Yi,F Cossutti,A P Onuchin,F Le Diberder,F Renga,R Bula,W H Toki,Q Zeng,G Lynch,J Malclès,D Su,M Steinke,J E Sundermann,R Sacco,C Voci,E Gabathuler,M Haire,D Aston,Y M Chia,C A Heusch,X Prudent,M Ebert,P S Jackson,C Angelini,S Passaggio,G Finocchiaro,M Davier,S L Wu,J F Hirschauer,T Glanzman,T M Hong,M Legendre,M K Sullivan,F Ferroni,M Pelliccioni,H P Paar,J M Bauer,A Dvoretskii,T Pulliam,J Albert,C Patrignani,J L Ritchie,D Côté,Y Xie,B Pan,M S Alam,E Di Marco,L Gladney,A Palano,D Hufnagel,R Cowan,K C Schofield,J J Regensburger,R Contri,W Park,R Messner,B A Schumm,W J Wisniewski,J Ernst ,A Denig ,H Lacker ,М Перл ,D Müller ,S Spanier ,J Nash ,M Purohit ,L Winstrom ,M Bóna ,J Garra Ticó ,A Pérez ,R.h Schindler ,В П Дружинин ,В Б Голубев ,Y B Pan ,K Yu Todyshev ,S Banerjee ,D Hutchcroft ,C Lü ,Ch Thiebaux ,M Macrı́ ,F Martínez-Vidal ,Dong Liu ,J Button‐Shafer ,S Majewski ,E Graugés ,J Kolb ,J Walsh ,Ch De La Vaissière ,M Charles ,T Latham ,A Dʼorazio ,B Meadows ,V Lüth ,N López-March ,D A Milanés ,D Dujmić ,T Çuhadar-Dönszelmann ,J E Brau ,J Dingfelder ,T Vazquez Schroeder ,J G Panduro Vazquez ,R Sobie ,P Patterí ,Ch Yèche ,Ph Leruste ,H A Neal

doi:10.1103/physrevlett.99.021603

Abstract

We report observations of CP violation in the decays B0 -> K+pi- and B0 -> pi+pi- in a sample of 383 million Y(4S) -> BBbar events. We find 4372 +/- 82 B0 -> K+pi- decays and measure the direct CP-violating charge asymmetry Akpi = -0.107 +/- 0.018 (stat) +0.007-0.004 (syst), which excludes the CP-conserving hypothesis with a significance of 5.5 standard deviations. In the same sample we find 1139 +/- 49 B0 -> pi+pi- decays and measure the CP-violating asymmetries Spipi = -0.60 +/- 0.11 (stat) +/- 0.03 (syst) and Cpipi = -0.21 +/- 0.09 (stat) +/- 0.02 (syst). CP conservation in B0 -> pi+pi- (Spipi=Cpipi=0) is excluded at a confidence level 1-C.L. = 8 * 10^{-8}, corresponding to 5.4 standard deviations.

Full Text