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Measurements of Branching Fractions and $CP$-Violating Asymmetries in $B^0 \rightarrow \pi^+\pi^-, K^+\pi^-, K^+K^-$ Decays

B. Aubert 1 D. Boutigny 1 J.M. Gaillard 1 A. Hicheur 1 Y. Karyotakis 1 J.P. Lees 1 P. Robbe 1 V. Tisserand 1 A. Zghiche 1 A. Palano A. Pompili G.P. Chen J.C. Chen N.D. Qi G. Rong P. Wang Y.S. Zhu G. Eigen B. Stugu G.S. Abrams A.W. Borgland A.B. Breon D.N. Brown J. Button-Shafer R.N. Cahn M.S. Gill A.V. Gritsan Y. Groysman R.G. Jacobsen R.W. Kadel J. Kadyk L.T. Kerth Yu.G. Kolomensky J.F. Kral Céline Leclerc M.E. Levi G. Lynch P.J. Oddone A. Perazzo M. Pripstein N.A. Roe A. Romosan M.T. Ronan V.G. Shelkov A.V. Telnov W.A. Wenzel P.G. Bright-Thomas T.J. Harrison C.M. Hawkes D.J. Knowles S.W. O'Neale R.C. Penny A.T. Watson N.K. Watson T. Deppermann K. Goetzen H. Koch M. Kunze B. Lewandowski K. Peters H. Schmuecker M. Steinke J.C. Andress N.R. Barlow W. Bhimji N. Chevalier P.J. Clark W.N. Cottingham N. de Groot N. Dyce B. Foster J.D. Mcfall D. Wallom F.F. Wilson K. Abe C. Hearty T.S. Mattison J.A. Mckenna D. Thiessen S. Jolly A.K. Mckemey J. Tinslay V.E. Blinov A.D. Bukin D.A. Bukin A.R. Buzykaev V.B. Golubev V.N. Ivanchenko A.A. Korol E.A. Kravchenko A.P. Onuchin A.A. Salnikov S.I. Serednyakov Yu.I. Skovpen V.I. Telnov A.N. Yushkov D. Best A.J. Lankford M. Mandelkern S. Mcmahon D.P. Stoker A. Ahsan K. Arisaka C. Buchanan S. Chun J.G. Branson D.B. Macfarlane S. Prell S. Rahatlou G. Raven V. Sharma C. Campagnari B. Dahmes P.A. Hart N. Kuznetsova S.L. Levy O. Long A. Lu J.D. Richman W. Verkerke M. Witherell S. Yellin J. Beringer D.E. Dorfan A.M. Eisner A.A. Grillo M. Grothe C.A. Heusch R.P. Johnson T. Pulliam H. Sadrozinski T. Schalk R.E. Schmitz B.A. Schumm A. Seiden M. Turri W. Walkowiak D.C. Williams M.G. Wilson E. Chen G.P. Dubois-Felsmann A. Dvoretskii D.G. Hitlin S. Metzler J. Oyang F.C. Porter A. Ryd A. Samuel M. Weaver S. Yang R.Y. Zhu S. Devmal T.L. Geld S. Jayatilleke G. Mancinelli B.T. Meadows M.D. Sokoloff T. Barillari P. Bloom M.O. Dima S. Fahey W.T. Ford D.R. Johnson U. Nauenberg A. Olivas P. Rankin J. Roy S. Sen J.G. Smith W.C. van Hoek D.L. Wagner J. Blouw M. Krishnamurthy A. Soffer W.H. Toki R.J. Wilson J. Zhang R. Aleksan G. de Domenico A. de Lesquen S. Emery A. Gaidot S.F. Ganzhur P.F. Giraud G. Hamel de Monchenault W. Kozanecki M. Langer G.W. London B. Mayer B. Serfass G. Vasseur C. Yeche M. Zito T. Brandt J. Brose T. Colberg M. Dickopp R.S. Dubitzky A. Hauke E. Maly R. Muller-Pfefferkorn S. Otto K.R. Schubert R. Schwierz B. Spaan L. Wilden D. Bernard G.R. Bonneaud F. Brochard J. Cohen-Tanugi S. Ferrag S. t'Jampens C. Thiebaux G. Vasileiadis M. Verderi A. Anjomshoaa R. Bernet A. Khan D. Lavin F. Muheim S. Playfer J.E. Swain M. Falbo C. Borean C. Bozzi S. Dittongo L. Piemontese E. Treadwell F. Anulli R. Baldini-Ferroli A. Calcaterra R. de Sangro D. Falciai G. Finocchiaro P. Patteri I.M. Peruzzi M. Piccolo Y. Xie A. Zallo S. Bagnasco A. Buzzo R. Contri G. Crosetti M. Lo Vetere M. Macri S. Passaggio C. Patrignani E. Robutti A. Santroni S. Tosi M. Morii R. Bartoldus R. Hamilton U. Mallik J. Cochran H.B. Crawley P.A. Fischer J. Lamsa W.T. Meyer E.I. Rosenberg G. Grosdidier A. Hocker H.M. Lacker S. Laplace V. Lepeltier A.M. Lutz Stéphane Plaszczynski M.H. Schune S. Trincaz-Duvoid G. Wormser R.M. Bionta V. Brigljevic D.J. Lange M. Mugge K. van Bibber D.M. Wright M. Carroll J.R. Fry E. Gabathuler R. Gamet M. George M. Kay D.J. Payne R.J. Sloane C. Touramanis M.L. Aspinwall D.A. Bowerman P.D. Dauncey U. Egede I. Eschrich N.J.W. Gunawardane J.A. Nash P. Sanders D. Smith D.E. Azzopardi J.J. Back P. Dixon P.F. Harrison R.J.L. Potter H.W. Shorthouse P. Strother P.B. Vidal M.I. Williams G. Cowan S. George M.G. Green A. Kurup C.E. Marker P. Mcgrath T.R. Mcmahon S. Ricciardi F. Salvatore I. Scott G. Vaitsas D. Brown C.L. Davis J. Allison R.J. Barlow J.T. Boyd A.C. Forti J. Fullwood F. Jackson G.D. Lafferty N. Savvas E.T. Simopoulos J.H. Weatherall A. Farbin A. Jawahery V. Lillard J. Olsen D.A. Roberts J.R. Schieck G. Blaylock C. Dallapiccola K.T. Flood S.S. Hertzbach R. Kofler V.G. Koptchev T.B. Moore H. Staengle S. Willocq B. Brau R. Cowan G. Sciolla F. Taylor R.K. Yamamoto M. Milek P.M. Patel F. Palombo J.M. Bauer L. Cremaldi V. Eschenburg R. Kroeger J. Reidy D.A. Sanders D.J. Summers J.-P. Martin J.Y. Nief R. Seitz P. Taras V. Zacek H. Nicholson C.S. Sutton N. Cavallo G. de Nardo F. Fabozzi C. Gatto L. Lista P. Paolucci D. Piccolo C. Sciacca J.M. Losecco J.R.G. Alsmiller T.A. Gabriel T. Handler J. Brau R. Frey M. Iwasaki N.B. Sinev D. Strom F. Colecchia F. Dal Corso A. Dorigo F. Galeazzi M. Margoni G. Michelon M. Morandin M. Posocco M. Rotondo F. Simonetto R. Stroili E. Torassa C. Voci Maurice. Benayoun H. Briand J. Chauveau P. David C. de la Vaissiere L. del Buono O. Hamon F. Le Diberder P. Leruste J. Ocariz L. Roos J. Stark S. Versille P.F. Manfredi V. Re V. Speziali E.D. Frank L. Gladney Q.H. Guo J. Panetta C. Angelini G. Batignani S. Bettarini M. Bondioli M. Carpinelli F. Forti M.A. Giorgi A. Lusiani F. Martinez-Vidal M. Morganti N. Neri E. Paoloni M. Rama G. Rizzo F. Sandrelli G. Simi G. Triggiani J. Walsh M. Haire D. Judd K. Paick L. Turnbull D.E. Wagoner J. Albert P. Elmer C. Lu K.T. Mcdonald V. Miftakov S.F. Schaffner A.J.S. Smith A. Tumanov E.W. Varnes G. Cavoto D. del Re R. Faccini F. Ferrarotto F. Ferroni E. Lamanna Emilio Leonardi M.A. Mazzoni S. Morganti G. Piredda F. Safai Tehrani M. Serra C. Voena S. Christ R. Waldi T. Adye B. Franek N.I. Geddes G.P. Gopal S.M. Xella N. Copty M.V. Purohit H. Singh F.X. Yumiceva I. Adam P.L. Anthony D. Aston K. Baird N. Berger E. Bloom A.M. Boyarski F. Bulos G. Calderini M.R. Convery D.P. Coupal D.H. Coward J. Dorfan W. Dunwoodie R.C. Field T. Glanzman G.L. Godfrey S.J. Gowdy P. Grosso T. Haas T. Himel T. Hrynova M.E. Huffer W.R. Innes C.P. Jessop M.H. Kelsey P. Kim M.L. Kocian U. Langenegger S. Luitz V. Luth H.L. Lynch H. Marsiske S. Menke R. Messner K.C. Moffeit R. Mount D.R. Muller C.P. O'Grady V.E. Ozcan M. Perl S. Petrak B.N. Ratcliff S.H. Robertson L.S. Rochester A. Roodman T. Schietinger R.H. Schindler J. Schwiening V.V. Serbo A. Snyder A. Soha S.M. Spanier J. Stelzer D. Su M.K. Sullivan H.A. Tanaka Jaroslav. Va'Vra S.R. Wagner A.J.R. Weinstein W.J. Wisniewski D.H. Wright C.C. Young P.R. Burchat C.H. Cheng D. Kirkby T.I. Meyer C. Roat R. Henderson W. Bugg H. Cohn A.W. Weidemann J.M. Izen I. Kitayama X.C. Lou F. Bianchi M. Bona D. Gamba A. Smol L. Bosisio G. Della Ricca L. Lanceri P. Poropat G. Vuagnin R.S. Panvini C.M. Brown P.D. Jackson R. Kowalewski J.M. Roney H.R. Band E. Charles S. Dasu F. Di Lodovico A.M. Eichenbaum H. Hu J.R. Johnson R. Liu Y. Pan R. Prepost I.J. Scott S.J. Sekula J.H. von Wimmersperg-Toeller Z. Yu T.M.B. Kordich H. Neal
Abstract : We present updated measurements of branching fractions and CP-violating asymmetries for neutral B meson decays to two-body final states of charged pions and kaons. The results are obtained from a data sample of about 60 million Y(4S) --> B-anti-B decays collected between 1999 and 2001 by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The sample contains 124^{+16}_{-15} pi-pi, 403+/-24 K-pi, and 0.6^{+8.0}_{-7.4} K-K candidates, from which we measure the following quantities: BF(B0 --> pi+pi-) = (5.4+/-0.7+/-0.4) x 10^{-6}, BF(B0 --> K+pi-) = (17.8+/-1.1+/-0.8) x 10^{-6}, BF(B0 --> K+K-) < 1.1 x 10^{-6} (90% C.L.} A_Kpi = -0.05+/-0.06+/-0.01 [-0.14,+0.05], S_pipi = -0.01+/-0.37+/-0.07 [-0.66,+0.62], C_pipi = -0.02+/-0.29+/-0.07 [-0.54,+0.48], where the errors are statistical and systematic, respectively, and the asymmetry limits correspond to the 90% confidence level. These results are preliminary.
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B. Aubert, D. Boutigny, J.M. Gaillard, A. Hicheur, Y. Karyotakis, et al.. Measurements of Branching Fractions and $CP$-Violating Asymmetries in $B^0 \rightarrow \pi^+\pi^-, K^+\pi^-, K^+K^-$ Decays. Rencontres de Moriond on Electroweak Interactions and Unified Theories 37, Mar 2002, Les Arcs, France. pp.1-15. ⟨in2p3-00012447⟩

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