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Measurement of CP asymmetries and branching fractions in charmless two-body B-meson decays to pions and kaons

  • J. P. Lees
  • , V. Poireau
  • , V. Tisserand
  • , J. Garra Tico
  • , E. Grauges
  • , A. Palano
  • , G. Eigen
  • , B. Stugu
  • , D. N. Brown
  • , L. T. Kerth
  • , Yu G. Kolomensky
  • , G. Lynch
  • , H. Koch
  • , T. Schroeder
  • , D. J. Asgeirsson
  • , C. Hearty
  • , T. S. Mattison
  • , J. A. McKenna
  • , R. Y. So
  • , A. Khan
  • V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, V. B. Golubev, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu I. Skovpen, E. P. Solodov, K. Yu Todyshev, A. N. Yushkov, M. Bondioli, D. Kirkby, A. J. Lankford, M. Mandelkern, H. Atmacan, J. W. Gary, F. Liu, O. Long, G. M. Vitug, C. Campagnari, T. M. Hong, D. Kovalskyi, J. D. Richman, C. A. West, A. M. Eisner, J. Kroseberg, W. S. Lockman, A. J. Martinez, B. A. Schumm, A. Seiden, D. S. Chao, C. H. Cheng, B. Echenard, K. T. Flood, D. G. Hitlin, P. Ongmongkolkul, F. C. Porter, A. Y. Rakitin, R. Andreassen, Z. Huard, B. T. Meadows, M. D. Sokoloff, L. Sun, P. C. Bloom, W. T. Ford, A. Gaz, U. Nauenberg, J. G. Smith, S. R. Wagner, R. Ayad, W. H. Toki, B. Spaan, K. R. Schubert, R. Schwierz, D. Bernard, M. Verderi, P. J. Clark, S. Playfer, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, E. Luppi, M. Munerato, M. Negrini, L. Piemontese, V. Santoro, R. Baldini-Ferroli, A. Calcaterra, R. De Sangro, G. Finocchiaro, P. Patteri, I. M. Peruzzi, M. Piccolo, M. Rama, A. Zallo, R. Contri, E. Guido, M. Lo Vetere, M. R. Monge, S. Passaggio, C. Patrignani, E. Robutti, B. Bhuyan, V. Prasad, C. L. Lee, M. Morii, A. J. Edwards, A. Adametz, U. Uwer, H. M. Lacker, T. Lueck, P. D. Dauncey, P. K. Behera, U. Mallik, C. Chen, J. Cochran, W. T. Meyer, S. Prell, A. E. Rubin, A. V. Gritsan, Z. J. Guo, N. Arnaud, M. Davier, D. Derkach, G. Grosdidier, F. Le Diberder, A. M. Lutz, B. Malaescu, P. Roudeau, M. H. Schune, A. Stocchi, G. Wormser, D. J. Lange, D. M. Wright, C. A. Chavez, J. P. Coleman, J. R. Fry, E. Gabathuler, D. E. Hutchcroft, D. J. Payne, C. Touramanis, A. J. Bevan, F. Di Lodovico, R. Sacco, M. Sigamani, G. Cowan, D. N. Brown, C. L. Davis, A. G. Denig, M. Fritsch, W. Gradl, K. Griessinger, A. Hafner, E. Prencipe, R. J. Barlow, G. Jackson, G. D. Lafferty, E. Behn, R. Cenci, B. Hamilton, A. Jawahery, D. A. Roberts, C. Dallapiccola, R. Cowan, D. Dujmic, G. Sciolla, R. Cheaib, D. Lindemann, P. M. Patel, S. H. Robertson, P. Biassoni, N. Neri, F. Palombo, S. Stracka, L. Cremaldi, R. Godang, R. Kroeger, P. Sonnek, D. J. Summers, X. Nguyen, M. Simard, P. Taras, G. De Nardo, D. Monorchio, G. Onorato, C. Sciacca, M. Martinelli, G. Raven, C. P. Jessop, J. M. Losecco, W. F. Wang, K. Honscheid, R. Kass, J. Brau, R. Frey, N. B. Sinev, D. Strom, E. Torrence, E. Feltresi, N. Gagliardi, M. Margoni, M. Morandin, M. Posocco, M. Rotondo, G. Simi, F. Simonetto, R. Stroili, S. Akar, E. Ben-Haim, M. Bomben, G. R. Bonneaud, H. Briand, G. Calderini, J. Chauveau, O. Hamon, Ph Leruste, G. Marchiori, J. Ocariz, S. Sitt, M. Biasini, E. Manoni, S. Pacetti, A. Rossi, C. Angelini, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, A. Cervelli, F. Forti, M. A. Giorgi, A. Lusiani, B. Oberhof, E. Paoloni, A. Perez, G. Rizzo, J. J. Walsh, D. Lopes Pegna, J. Olsen, A. J.S. Smith, A. V. Telnov, F. Anulli, R. Faccini, F. Ferrarotto, F. Ferroni, M. Gaspero, L. Li Gioi, M. A. Mazzoni, G. Piredda, C. Bünger, O. Grünberg, T. Hartmann, T. Leddig, H. Schröder, C. Voss, R. Waldi, T. Adye, E. O. Olaiya, F. F. Wilson, S. Emery, G. Hamel De Monchenault, G. Vasseur, Ch Yèche, D. Aston, D. J. Bard, R. Bartoldus, J. F. Benitez, C. Cartaro, M. R. Convery, J. Dorfan, G. P. Dubois-Felsmann, W. Dunwoodie, M. Ebert, R. C. Field, M. Franco Sevilla, B. G. Fulsom, A. M. Gabareen, M. T. Graham, P. Grenier, C. Hast, W. R. Innes, M. H. Kelsey, P. Kim, M. L. Kocian, D. W.G.S. Leith, P. Lewis, B. Lindquist, S. Luitz, V. Luth, H. L. Lynch, D. B. MacFarlane, D. R. Muller, H. Neal, S. Nelson, M. Perl, T. Pulliam, B. N. Ratcliff, A. Roodman, A. A. Salnikov, R. H. Schindler, A. Snyder, D. Su, M. K. Sullivan, J. Va'Vra, A. P. Wagner, W. J. Wisniewski, M. Wittgen, D. H. Wright, H. W. Wulsin, C. C. Young, V. Ziegler, W. Park, M. V. Purohit, R. M. White, J. R. Wilson, A. Randle-Conde, S. J. Sekula, M. Bellis, P. R. Burchat, T. S. Miyashita, M. S. Alam, J. A. Ernst, R. Gorodeisky, N. Guttman, D. R. Peimer, A. Soffer, P. Lund, S. M. Spanier, J. L. Ritchie, A. M. Ruland, R. F. Schwitters, B. C. Wray, J. M. Izen, X. C. Lou, F. Bianchi, D. Gamba, L. Lanceri, L. Vitale, F. Martinez-Vidal, A. Oyanguren, H. Ahmed, J. Albert, Sw Banerjee, F. U. Bernlochner, H. H.F. Choi, G. J. King, R. Kowalewski, M. J. Lewczuk, I. M. Nugent, J. M. Roney, R. J. Sobie, N. Tasneem, T. J. Gershon, P. F. Harrison, T. E. Latham, E. M.T. Puccio, H. R. Band, S. Dasu, Y. Pan, R. Prepost, S. L. Wu
  • Université Savoie Mont Blanc
  • University of Barcelona
  • INFN Sezione di Bari
  • Università degli studi di Bari Aldo Moro
  • University of Bergen
  • University of California, Berkeley
  • Ruhr-University Bochum
  • University of British Columbia
  • Brunel University London
  • Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
  • Long Beach VA and University of California
  • University of California, Riverside
  • University of California, Santa Barbara
  • University of California at Santa Cruz
  • California Institute of Technology
  • University of Cincinnati
  • University of Colorado Boulder
  • Cooperative Institute for Research in the Atmosphere
  • University of Dortmund
  • Technical University Dresden
  • University of Edinburgh
  • Sezione INFN di Ferrara
  • University of Ferrara
  • LNF-INFN
  • Sezione di Genova
  • University of Genoa
  • Department of Biosciences and Bioengineering
  • Harvard University
  • Harvey Mudd College
  • University of Heidelberg
  • Humboldt-Universität zu Berlin
  • Imperial College London
  • University of Iowa
  • Iowa State University
  • Johns Hopkins University
  • Laboratoire de l'Accélérateur Linéaire
  • Lawrence Livermore National Laboratory
  • University of Liverpool
  • Queen Mary University of London
  • Royal Holloway University of London
  • University of Louisville
  • Johannes Gutenberg University
  • University of Manchester
  • University of Maryland, College Park
  • UMass Amherst
  • Massachusetts Institute of Technology
  • McGill University
  • Sezione INFN di Milano
  • University of Milano
  • University of Mississippi
  • Universite de Montreal
  • INFN Sezione di Napoli
  • University of Naples Federico II
  • Science Park 105
  • University of Notre Dame
  • The Ohio State University
  • University of Oregon
  • INFN
  • University of Padova
  • Universités Paris VI and VII
  • INFN Sezione di Perugia
  • University of Perugia
  • Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
  • University of Pisa
  • Scuola Normale Superiore di Pisa
  • Princeton University
  • Sezione di Roma
  • Dipartimento di Fisica
  • Universität Rostock
  • CCLRC Rutherford Appleton Laboratory
  • CEA/UVSQ/CNRS
  • Stanford Linear Accelerator Center
  • University of South Carolina
  • Southern Methodist University
  • Stanford University
  • State University of New York Albany
  • Tel Aviv University
  • University of Tennessee
  • The University of Texas at Austin
  • University of Texas
  • INFN Sezione di Torino
  • University of Turin
  • INFN Sezione di Trieste
  • University of Trieste
  • University of Valencia
  • University of Victoria
  • University of Warwick
  • University of Wisconsin-Madison

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)

Abstract

We present improved measurements of CP-violation parameters in the decays B0→π+π-, B0→K+π-, and B0→π0π0, and of the branching fractions for B0→π0π0 and B0→K0π0. The results are obtained with the full data set collected at the Υ(4S) resonance by the BABAR experiment at the PEP-II asymmetric-energy B factory at the SLAC National Accelerator Laboratory, corresponding to (467±5)×106 BB̄ pairs. We find the CP-violation parameter values and branching fractions: Sπ+π-=- 0.68±0.10±0.03, Cπ+π-=-0.25±0.08±0. 02, AK-π+=-0.107±0.016-0.004+0.006, C π0π0=-0.43±0.26±0.05, B(B0→π0π0)=(1. 83±0.21±0.13)×10-6, B(B0→K0π0)=(10. 1±0.6±0.4)×10-6, where in each case, the first uncertainties are statistical and the second are systematic. We observe CP violation with a significance of 6.7 standard deviations for B0→π+π- and 6.1 standard deviations for B0→K+π-, including systematic uncertainties. Constraints on the unitarity triangle angle α are determined from the isospin relations among the B→ππ rates and asymmetries. Considering only the solution preferred by the Standard Model, we find α to be in the range [71, 109] at the 68% confidence level.

Original languageEnglish
Article number052009
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume87
Issue number5
DOIs
Publication statusPublished - 6 Mar 2013

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