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

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; BABAR Collaboration

doi:10.1103/PhysRevLett.109.191801

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

Phys Rev Lett. 2012 Nov 9;109(19):191801. doi: 10.1103/PhysRevLett.109.191801. Epub 2012 Nov 9.

Authors

J P Lees¹, 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; BABAR Collaboration

Affiliation

¹ Laboratoire d'Annecy-le-Vieux de Physique des Particules, Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France.

PMID: 23215373
DOI: 10.1103/PhysRevLett.109.191801

Abstract

The photon spectrum in the inclusive electromagnetic radiative decays of the B meson, B → X(s)γ plus B → X(d)γ, is studied using a data sample of (382.8 ± 4.2) × 10(6)Υ(4S) → BB decays collected by the BABAR experiment at SLAC. The spectrum is used to extract the branching fraction B(B → X(s)γ) = (3.21 ± 0.33) × 10(-4) for E(γ) >1.8 GeV and the direct CP asymmetry A(CP) (B → X(s+d)γ) = 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.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Mesons
Models, Theoretical*
Nuclear Energy
Nuclear Physics / methods*
Photons*