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Precision measurement of the B→X sγ photon energy spectrum, branching fraction, and direct CP asymmetry A CP(B→ X s+dγ)

  • 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, L. Winstrom, 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, 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, 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, K. Knoepfel, J. M. Losecco, W. F. Wang, K. Honscheid, R. Kass, J. Brau, R. Frey, M. Lu, 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, P. Bechtle, 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, S. Zambito, 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
  • Facultat de Fisica
  • University of Barcelona
  • INFN Sezione di Bari
  • Dipartimento di Fisica
  • Università degli studi di Bari Aldo Moro
  • Institute of Physics
  • University of Bergen
  • University of California, Berkeley
  • Institut für Experimentalphysik 1
  • 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 Tabuk
  • Fakultät Physik
  • University of Dortmund
  • Institut für Kern- und Teilchenphysik
  • Technical University Dresden
  • University of Edinburgh
  • Sezione INFN di Ferrara
  • Dipartimento di Fisica
  • University of Ferrara
  • LNF-INFN
  • INFM CRS-SOFT
  • University of Perugia
  • Sezione di Genova
  • University of Genoa
  • Department of Biosciences and Bioengineering
  • Harvard University
  • Harvey Mudd College
  • Physikalisches Institut
  • University of Heidelberg
  • Institut für Physik
  • Humboldt-Universität zu Berlin
  • Imperial College London
  • University of Iowa
  • Iowa State University
  • Johns Hopkins University
  • Université Paris-Sud
  • Lawrence Livermore National Laboratory
  • University of Liverpool
  • Queen Mary University of London
  • Royal Holloway University of London
  • University of Louisville
  • Institut für Kernphysik
  • Johannes Gutenberg University
  • University of Manchester
  • University of Huddersfield
  • University of Maryland, College Park
  • UMass Amherst
  • Massachusetts Institute of Technology
  • McGill University
  • Sezione INFN di Milano
  • Dipartimento di Fisica
  • University of Milano
  • University of Mississippi
  • Universety of South Alabama
  • Universite de Montreal
  • INFN Sezione di Napoli
  • Dipartimento di Scienze Fisiche
  • University of Naples Federico II
  • Science Park 105
  • University of Notre Dame
  • The Ohio State University
  • University of Oregon
  • INFN
  • Dipartimento di Fisica
  • University of Padova
  • Universités Paris VI and VII
  • INFN Sezione di Perugia
  • Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
  • Department of Physics
  • University of Pisa
  • Dipartimento di Scienze Biomediche
  • 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
  • School of Physics and Astronomy
  • Tel Aviv University
  • University of Tennessee
  • The University of Texas at Austin
  • University of Texas
  • INFN Sezione di Torino
  • Dipartimento di Fisica Sperimentale
  • University of Turin
  • INFN Sezione di Trieste
  • Dipartimento di Fisica
  • University of Trieste
  • University of Valencia
  • University of Victoria
  • Department of Physics
  • University of Warwick
  • University of Wisconsin-Madison

Research output: Contribution to journal › Article › peer-review

100 Citations (Scopus)

Abstract

The photon spectrum in the inclusive electromagnetic radiative decays of the B meson, B→X sγ plus B→X dγ, is studied using a data sample of (382.8±4.2)×106Υ(4S) →BB̄ decays collected by the BABAR experiment at SLAC. The spectrum is used to extract the branching fraction B(B→X sγ)=(3. 21±0.33)×10 -4 for E γ>1.8GeV and the direct CP asymmetry A CP(B→X s+dγ)=0. 057±0.063. The effects of detector resolution and Doppler smearing are unfolded to measure the photon energy spectrum in the B meson rest frame.

Original languageEnglish
Article number191801
JournalPhysical Review Letters
Volume109
Issue number19
DOIs
Publication statusPublished - 9 Nov 2012

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