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Measurements of Branching Fractions and Direct $CP$ Asymmetries in $\pi^+\pi^0, K^+\pi^0$ and $K^0\pi^0 B$ 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 J.C. Chen N.D. Qi G. Rong P. Wang Y.S. Zhu G. Eigen I. Ofte B. Stugu G.S. Abrams A.W. Borgland A.B. Breon D.N. Brown J. Button-Shafer R.N. Cahn E. Charles 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 L.M. Mir P.J. Oddone T.J. Orimoto M. Pripstein N.A. Roe A. Romosan M.T. Ronan V.G. Shelkov A.V. Telnov W.A. Wenzel 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 B. Lewandowski K. Peters H. Schmuecker M. Steinke N.R. Barlow W. Bhimji J.T. Boyd N. Chevalier P.J. Clark W.N. Cottingham C. Mackay F.F. Wilson K. Abe C. Hearty T.S. Mattison J.A. Mckenna D. Thiessen S. Jolly A.K. Mckemey V.E. Blinov A.D. Bukin A.R. Buzykaev V.B. Golubev V.N. Ivanchenko A.A. Korol E.A. Kravchenko A.P. Onuchin S.I. Serednyakov Yu.I. Skovpen A.N. Yushkov D. Best M. Chao D. Kirkby A.J. Lankford M. Mandelkern S. Mcmahon D.P. Stoker C. Buchanan S. Chun H.K. Hadavand E.J. Hill D.B. Macfarlane H. Paar S. Prell S. Rahatlou G. Raven V. Sharma J.W. Berryhill C. Campagnari B. Dahmes P.A. Hart N. Kuznetsova S.L. Levy O. Long M.A. Mazur J.D. Richman W. Verkerke J. Beringer A.M. Eisner M. Grothe C.A. Heusch W.S. Lockman T. Pulliam 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 F.C. Porter A. Ryd A. Samuel S. Yang S. Jayatilleke G. Mancinelli B.T. Meadows M.D. Sokoloff T. Barillari P. Bloom W.T. Ford U. Nauenberg A. Olivas P. Rankin J. Roy J.G. Smith W.C. van Hoek L. Zhang J.L. Harton T. Hu M. Krishnamurthy A. Soffer W.H. Toki R.J. Wilson J. Zhang D. Altenburg 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 J. Tinslay M. Falbo C. Borean C. Bozzi L. Piemontese A. Sarti E. Treadwell F. Anulli R. Baldini-Ferroli A. Calcaterra R. de Sangro D. Falciai G. Finocchiaro P. Patteri I.M. Peruzzi M. Piccolo A. Zallo S. Bagnasco A. Buzzo R. Contri G. Crosetti M. Lo Vetere M. Macri M.R. Monge F.C. Pastore C. Patrignani E. Robutti A. Santroni S. Tosi S. Bailey M. Morii R. Bartoldus G.J. Grenier U. Mallik J. Cochran H.B. Crawley J. Lamsa W.T. Meyer E.I. Rosenberg J. Yi M. Davier G. Grosdidier A. Hocker H.M. Lacker S. Laplace F. Le Diberder V. Lepeltier A.M. Lutz T.C. Petersen Stéphane Plaszczynski M.H. Schune L. Tantot S. Trincaz-Duvoid G. Wormser R.M. Bionta V. Brigljevic D.J. Lange K. van Bibber D.M. Wright A.J. Bevan 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 G.W. Morton J.A. Nash P. Sanders D. Smith G.P. Taylor J.J. Back G. Bellodi P. Dixon P.F. Harrison R.J.L. Potter H.W. Shorthouse P. Strother P.B. Vidal G. Cowan H.U. Flaecher S. George M.G. Green A. Kurup C.E. Marker T.R. Mcmahon S. Ricciardi F. Salvatore G. Vaitsas M.A. Winter D. Brown C.L. Davis J. Allison R.J. Barlow A.C. Forti F. Jackson G.D. Lafferty A.J. Lyon N. Savvas J.H. Weatherall J.C. Williams A. Farbin A. Jawahery V. Lillard D.A. Roberts J.R. Schieck G. Blaylock C. Dallapiccola K.T. Flood S.S. Hertzbach R. Kofler V.B. 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 C. Hast P. Taras H. Nicholson 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 J. Brau R. Frey M. Iwasaki C.T. Potter N.B. Sinev D. Strom E. Torrence F. Colecchia A. Dorigo F. Galeazzi M. Margoni M. Morandin M. Posocco M. Rotondo F. Simonetto R. Stroili C. Voci M. Benayoun H. Briand J. Chauveau P. David C. de la Vaissiere L. del Buono O. Hamon P. Leruste J. Ocariz M. Pivk L. Roos J. Stark P.F. Manfredi V. Re V. Speziali L. Gladney Q.H. Guo J. Panetta C. Angelini G. Batignani S. Bettarini M. Bondioli F. Bucci G. Calderini E. Campagna M. Carpinelli F. Forti M.A. Giorgi A. Lusiani G. Marchiori F. Martinez-Vidal M. Morganti N. Neri E. Paoloni M. Rama G. Rizzo F. Sandrelli G. Triggiani J. Walsh M. Haire D. Judd K. Paick L. Turnbull D.E. Wagoner J. Albert N. Danielson P. Elmer C. Lu V. Miftakov J. Olsen S.F. Schaffner A.J.S. Smith A. Tumanov E.W. Varnes F. Bellini G. Cavoto D. del Re R. Faccini F. Ferrarotto F. Ferroni Emilio Leonardi S. Morganti G. Piredda F. Safai Tehrani M. Serra C. Voena S. Christ G. Wagner R. Waldi T. Adye N. de Groot B. Franek N.I. Geddes G.P. Gopal S.M. Xella R. Aleksan S. Emery A. Gaidot P.F. Giraud G. Hamel de Monchenault W. Kozanecki M. Langer G.W. London B. Mayer G. Schott B. Serfass G. Vasseur C. Yeche M. Zito M.V. Purohit A.W. Weidemann F.X. Yumiceva I. Adam D. Aston N. Berger A.M. Boyarski M.R. Convery D.P. Coupal D. Dong J. Dorfan W. Dunwoodie R.C. Field T. Glanzman S.J. Gowdy E. Grauges T. Haas T. Hadig V. Halyo T. Himel T. Hrynova M.E. Huffer W.R. Innes C.P. Jessop M.H. Kelsey P. Kim M.L. Kocian U. Langenegger D.W.G.S. Leith S. Luitz V. Luth H.L. Lynch H. Marsiske S. Menke R. Messner D.R. Muller C.P. O'Grady V.E. Ozcan A. Perazzo M. Perl S. Petrak H. Quinn B.N. Ratcliff S.H. Robertson A. Roodman A.A. Salnikov T. Schietinger R.H. Schindler J. Schwiening G. Simi A. Snyder A. Soha S.M. Spanier J. Stelzer D. Su M.K. Sullivan H.A. Tanaka J. Vavra S.R. Wagner M. Weaver A.J.R. Weinstein W.J. Wisniewski D.H. Wright C.C. Young P.R. Burchat C.H. Cheng T.I. Meyer C. Roat R. Henderson W. Bugg H. Cohn J.M. Izen I. Kitayama X.C. Lou F. Bianchi M. Bona D. Gamb L. Bosisio G. Della Ricca S. Dittongo L. Lanceri P. Poropat L. Vitale G. Vuagnin R.S. Panvini S. Banerjee C.M. Brown D. Fortin P.D. Jackson R. Kowalewski J.M. Roney H.R. Band S. Dasu M. Datta A.M. Eichenbaum H. Hu J.R. Johnson R. Liu F. Di Lodovico A. Mohapatra Y. Pan R. Prepost I.J. Scott S.J. Sekula J.H. von Wimmersperg-Toeller J. Wu S.L. Wu Z. Yu H. Neal
Abstract : We present preliminary results of the analyses of B^+ --> h^+ pi^0 (with h^+ = pi^+, K^+) and B^0 --> K^0 pi^0 decays from a sample of approximately 88 million B bar{B} pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure the pi^+ pi^0 branching fraction and we obtain B(B^+ --> pi^+ pi^0) = (5.5^{+1.0}_{-0.9} +/- 0.6) times 10^{-6} with a significance of 7.7 sigma including systematic uncertainties. We measure the K^+ pi^0 and K^0 pi^0 branching fractions to be B(B^+ --> K^+ pi^0) = (12.8^{+1.2}_{-1.1} +/- 1.0) times 10^{-6} and B(B^0 --> K^0 pi^0) = (10.4 +/- 1.5 +/- 0.8) times 10^{-6}. At the same time, the direct CP-violating asymmetries are investigated and we find A_{pi^+ pi^0} = -0.03_{-0.17}^{+0.18} +/- 0.02, A_{K^+ pi^0} = -0.09 +/- 0.09 +/- 0.01 and A_{K^0 pi^0} = 0.03 +/- 0.36 +/- 0.09, where the errors are statistical and systematic, respectively.
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Submitted on : Tuesday, January 14, 2003 - 5:15:39 PM
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B. Aubert, D. Boutigny, J.M. Gaillard, A. Hicheur, Y. Karyotakis, et al.. Measurements of Branching Fractions and Direct $CP$ Asymmetries in $\pi^+\pi^0, K^+\pi^0$ and $K^0\pi^0 B$ Decays. International Conference on High Energy Physics 31 ICHEP 2002, Jul 2002, Amsterdam, Netherlands. pp.1-16. ⟨in2p3-00012430⟩

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