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Measurement of B (B -> Xs gamma), the B -> Xs gamma photon energy spectrum, and the direct CP asymmetry in B -> Xs+d gamma decays
- Source :
- Lees, J P, Poireau, V, Tisserand, V, Garra Tico, J, Grauges, E, Palano, A, Eigen, G, Stugu, B, Brown, D N, Kerth, L T, Kolomensky, Y G, Lynch, G, Schroeder, T, Asgeirsson, D J, Hearty, C, Mattison, T S, McKenna, J A, So, R Y, Khan, A, Blinov, V E, Buzykaev, A R, Druzhinin, V P, Golubev, V B, Kravchenko, E A, Onuchin, A P, Serednyakov, S I, Skovpen, Y I, Solodov, E P, Todyshev, K Y, Yushkov, A N, Bondioli, M, Kirkby, D, Lankford, A J, Mandelkern, M, Atmacan, H, Gary, J W, Liu, F, Long, O, Vitug, G M, Campagnari, C, Hong, T M, Kovalskyi, D, Richman, J D, West, C A, Eisner, A M, Kroseberg, J, Lockman, W S, Martinez, A J, Schumm, B A, Seiden, A, Winstrom, L, Chao, D S, Echenard, B, Flood, K T, Hitlin, D G, Ongmongkolkul, P, Rakitin, A Y, Andreassen, R, Huard, Z, Meadows, B T, Sokoloff, M D, Sun, L, Bloom, P C, Ford, W T, Gaz, A, Nauenberg, U, Smith, J G, Wagner, S R, Ayad, R, Toki, W H, Spaan, B, Schubert, K R, Schwierz, R, Bernard, D, Verderi, M, Clark, P J, Playfer, S, Bettoni, D, Bozzi, C, Calabrese, R, Cibinetto, G, Fioravanti, E, Garzia, I, Luppi, E, Muerato, M, Piemontese, L, Santoro, V, Baldini-Ferroli, R, Calcaterra, A, de Sangro, R, Finocchiaro, G, Patteri, P, Peruzzi, I M, Piccolo, M, Rama, M, Zallo, A, Contri, R, Guido, E, Lo Vetere, M, Monge, M R, Passaggio, S, Patrignani, C, Robutti, E, Bhuyan, B, Prasad, V, Le, C L, Morii, M, Edwards, A J, Adametz, A, Uwer, U, Lacker, H M, Lueck, T, Dauncey, P D, Mallik, U, Cochran, J, Meyer, W T, Prell, S, Rubin, A E, Gritsan, A V, Guo, Z J, Arnaud, N, Davier, M, Derkach, D, Grosdidier, G, Le Diberder, F, Lutz, A M, Malaescu, B, Roudeau, P, Schune, M H, Stocchi, A, Wormser, G, Lange, D J, Wright, D M, Chavez, C A, Coleman, J P, Fry, J R, Gabathuler, E, Hutchcroft, D E, Payne, D J, Touramanis, C, Bevan, A J, Di Lodovico, F, Sacco, R, Sigamani, M, Cowan, G, Brown, D N, Davis, C L, Denig, A G, Fritsch, M, Gradl, W, Griessinger, K, Hafner, A, Prencipe, E, Barlow, R J, Jackson, G, Lafferty, G D, Behn, E, Cenci, R, Hamilton, B, Jawahery, A, Roberts, D A, Dallapiccola, C, Cowan, R, Dujmic, D, Sciolla, G, Cheaib, R, Lindemann, D, Patel, P M, Robertson, S H, Biassoni, P, Neri, N, Palombo, F, Stracka, S, Cremaldi, L, Godang, R, Kroeger, R, Sonnek, P, Summers, D J, Nguyen, X, Simard, M, Taras, P, De Nardo, G, Monorchio, D, Onorato, G, Sciacca, C, Martinelli, M, Raven, G, Jessop, C P, Knoepfel, K, LoSecco, J M, Honscheid, K, Kass, R, Brau, J, Frey, R, Lu, M, Sinev, N B, Strom, D, Torrence, E, Feltresi, E, Gagliardi, N, Margoni, M, Morandin, M, Posocco, M, Rotondo, M, Simi, G, Simonetto, F, Stroili, R, Akar, S, Ben-Haim, E, Bomben, M, Bonneaud, G R, Briand, H, Calderini, G, Chauveau, J, Hamon, O, Leruste, P, Marchiori, G, Ocariz, J, Sitt, S, Biasini, M, Manoni, E, Pacetti, S, Rossi, A, Angelini, C, Batignani, G, Bettarini, S, Carpinelli, M, Casarosa, G, Cervelli, A, Forti, F, Giorgi, M A, Lusiani, A, Oberhof, B, Paoloni, E, Perez, A, Rizzo, G, Walsh, J J, Pegna, D L, Olsen, J, Smith, A J S, Telnov, A V, Anulli, F, Faccini, R, Ferrarotto, F, Ferroni, F, Gaspero, M, Gioi, L L, Mazzoni, M A, Piredda, G, Buenger, C, Gruenberg, O, Leddig, T, Schroeder, H, Voss, C, Waldi, R, Adye, T, Olaiya, E O, Wilson, F F, Emery, S, de Monchenault, G H, Vasseur, G, Yeche, C, Aston, D, Bard, D J, Bartoldus, R, Bechtle, P, Benitez, J F, Cartaro, C, Convery, M R, Dorfan, J, Dubois-Felsmann, G P, Dunwoodie, W, Ebert, M, Field, R C, Sevilla, M F, Fulsom, B G, Gabareen, A M, Graham, M T, Grenier, P, Hast, C, Innes, W R, Kelsey, M H, Kim, P, Kocian, M L, Leith, D W G S, Lewis, P, Lindquist, B, Luitz, S, Luth, V, Lynch, H L, MacFarlane, D B, Muller, D R, Neal, H, Nelson, S, Perl, M, Pulliam, T, Ratcliff, B N, Roodman, A, Salnikov, A A, Schindler, R H, Snyder, A, Su, D, Sullivan, M K, Va'vra, J, Wisniewski, W J, Wittgen, M, Wright, D H, Wulsin, H W, Young, C C, Ziegler, V, Park, W, Purohit, M V, White, R M, Wilson, J R, Randle-Conde, A, Sekula, S J, Bellis, M, Burchat, P R, Miyashita, T S, Alam, M S, Ernst, J A, Gorodeisky, R, Guttman, N, Peimer, D R, Soffer, A, Lund, P, Spanier, S M, Ritchie, J L, Ruland, A M, Schwitters, R F, Wray, B C, Izen, J M, Lou, X C, Bianchi, F, Gamba, D, Zambito, S, Lanceri, L, Vitale, L, Martinez-Vidal, F, Oyanguren, A, Ahmed, H, Albert, J, Banerjee, S, Bernlochner, F U, Choi, H H F, Kowalewski, R, Lewczuk, M J, Nugent, I M, Roney, J M, Sobie, R J, Tasneem, N, Gershon, T J, Harrison, P F, Latham, T E, Puccio, E M T, Band, H R, Dasu, S, Pan, Y & Prepost, R 2012, ' Measurement of B (B-> Xs gamma), the B-> Xs gamma photon energy spectrum, and the direct CP asymmetry in B-> Xs+d gamma decays ', Physical Review D, vol. 86, no. 11, 112008 . https://doi.org/10.1103/PhysRevD.86.112008
- Publication Year :
- 2012
-
Abstract
- The photon spectrum in B→Xsγ decay, where Xs is any strange hadronic state, is studied using a data sample of (382.8±4.2)×106 e+e−→Υ(4S)→B ¯¯¯ B events collected by the BABAR experiment at the PEP-II collider. The spectrum is used to measure the branching fraction B(B→Xsγ)=(3.21±0.15±0.29±0.08)×10−4 and the first, second, and third moments ⟨Eγ⟩=2.267±0.019±0.032±0.003 GeV, ⟨(Eγ−⟨Eγ⟩)2⟩=0.0484±0.0053±0.0077±0.0005 GeV2, and ⟨(Eγ−⟨Eγ⟩)3⟩=−0.0048±0.0011±0.0011±0.0004 GeV3, for the range Eγ>1.8 GeV, where Eγ is the photon energy in the B-meson rest frame. Results are also presented for narrower Eγ ranges. In addition, the direct CP asymmetry ACP(B→Xs+dγ) is measured to be 0.057±0.063. The spectrum itself is also unfolded to the B-meson rest frame; that is the frame in which theoretical predictions for its shape are made.
- Subjects :
- SDG 7 - Affordable and Clean Energy
Subjects
Details
- Language :
- English
- ISSN :
- 24700010
- Volume :
- 86
- Issue :
- 11
- Database :
- OpenAIRE
- Journal :
- Physical Review D
- Accession number :
- edsair.dedup.wf.001..eebcc233c2e1bc35a64eb5f1f59c669f
- Full Text :
- https://doi.org/10.1103/PhysRevD.86.112008