Measurement of the B+→ωℓ+ν branching fraction with semileptonically tagged B mesons

Lees, J; Poireau, V; Tisserand, V; Grauges, E; Palano, A; Eigen, G; Stugu, B; Brown, D; Kerth, L; Kolomensky, Y; Lee, M; Lynch, G; Koch, H; Schroeder, T; Hearty, C; Mattison, T; Mckenna, J; R. Y., S; Khan, A; Blinov, V; Buzykaev, A; Druzhinin, V; Golubev, V; Kravchenko, E; Onuchin, A; Serednyakov, S; Skovpen, Y; Solodov, E; Todyshev, K; Yushkov, A; Kirkby, D; Lankford, A; Mandelkern, M; Dey, B; Gary, J; Long, O; Vitug, G; Campagnari, C; Franco, S; Hong, T; Kovalskyi, D; Richman, J; West, C; Eisner, A; Lockman, W; Martinez, A; Schumm, B; Seiden, A; Chao, D; Cheng, C; Echenard, B; Flood, K; Hitlin, D; Ongmongkolkul, P; Porter, F; Andreassen, R; Huard, Z; Meadows, B; Pushpawela, B; Sokoloff, M; Sun, L; Bloom, P; Ford, W; Gaz, A; Nagel, M; Nauenberg, U; Smith, J; Wagner, S; Ayad, R; Toki, W; Spaan, B; Schwierz, R; Bernard, D; Verderi, M; Playfer, S; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Fioravanti, E; Garzia, I; Luppi, E; Piemontese, L; Santoro, V; Baldini Ferroli, R; Calcaterra, A; de Sangro, R; Finocchiaro, G; Martellotti, S; Patteri, P; Peruzzi, I; Piccolo, M; Rama, M; Zallo, A; Contri, R; Guido, E; Lo Vetere, M; Monge, M; Passaggio, S; Patrignani, C; Robutti, E; Bhuyan, B; Prasad, V; Morii, M; Adametz, A; Uwer, U; Lacker, H; Dauncey, P; Mallik, U; Chen, C; Cochran, J; Meyer, W; Prell, S; Rubin, A; Gritsan, A; Arnaud, N; Davier, M; Derkach, D; Grosdidier, G; Le Diberder, F; Lutz, A; Malaescu, B; Roudeau, P; Stocchi, A; Wormser, G; Lange, D; Wright, D; Coleman, J; Fry, J; Gabathuler, E; Hutchcroft, D; Payne, D; Touramanis, C; Bevan, A; Di Lodovico, F; Sacco, R; Cowan, G; Bougher, J; Brown, D; Davis, C; Denig, A; Fritsch, M; Gradl, W; Griessinger, K; Hafner, A; Prencipe, E; Schubert, K; Barlow, R; Lafferty, G; Behn, E; Cenci, R; Hamilton, B; Jawahery, A; Roberts, D; Cowan, R; Dujmic, D; Sciolla, G; Cheaib, R; Patel, P; Robertson, S; Biassoni, P; Neri, N; Palombo, F; Cremaldi, L; Godang, R; Sonnek, P; Summers, D; Nguyen, X; Simard, M; Taras, P; De Nardo, G; Monorchio, D; Onorato, G; Sciacca, C; Martinelli, M; Raven, G; Jessop, C; Losecco, J; Honscheid, K; Kass, R; Brau, J; Frey, R; Sinev, N; Strom, D; Torrence, E; Feltresi, E; Margoni, M; Morandin, M; Posocco, M; Rotondo, M; Simi, G; Simonetto, F; Stroili, R; Akar, S; Ben Haim, E; Bomben, M; Bonneaud, G; Briand, H; Calderini, G; Chauveau, J; 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; Lusiani, A; Oberhof, B; Paoloni, E; Perez, A; Rizzo, G; Walsh, J; Lopes, P; Olsen, J; Smith, A; Faccini, R; Ferrarotto, F; Ferroni, F; Gaspero, M; Gioi L., L; Piredda, G; Buenger, C; Gruenberg, O; Hartmann, T; Leddig, T; Voss, C; Waldi, R; Adye, T; Olaiya, E; Wilson, F; Emery, S; Hamel, D; Vasseur, G; Yeche, C; Anulli, F; Aston, D; Bard, D; Benitez, J; Cartaro, C; Convery, M; Dorfan, J; Dubois Felsmann, G; Dunwoodie, W; Ebert, M; Field, R; Fulsom, B; Gabareen, A; Graham, M; Hast, C; Innes, W; Kim, P; Kocian, M; Leith, D; Lewis, P; Lindemann, D; Lindquist, B; Luitz, S; Luth, V; Lynch, H; Macfarlane, D; Muller, D; Neal, H; Nelson, S; Perl, M; Pulliam, T; Ratcliff, B; Roodman, A; Salnikov, A; Schindler, R; Snyder, A; Su, D; Sullivan, M; Va'Vra, J; Wagner, A; Wang, W; Wisniewski, W; Wittgen, M; Wright, D; Wulsin, H; Ziegler, V; Park, W; Purohit, M; White, R; Wilson, J; Randle Conde, A; Sekula, S; Bellis, M; Burchat, P; Miyashita, T; Puccio, E; Alam, M; Ernst, J; Gorodeisky, R; Guttman, N; Peimer, D; Soffer, A; Spanier, S; Ritchie, J; Ruland, A; Schwitters, R; Wray, B; Izen, J; Lou, X; Bianchi, F; De Mori, F; Filippi, A; Gamba, D; Zambito, S; Lanceri, L; Vitale, L; Martinez Vidal, F; Oyanguren, A; Villanueva Perez, P; Ahmed, H; Albert, J; Banerjee, S; Bernlochner, F; Choi, H; King, G; Kowalewski, R; Lewczuk, M; Lueck, T; Nugent, I; Roney, J; Sobie, R; Tasneem, N; Gershon, T; Harrison, P; Latham, T; Band, H; Dasu, S; Pan, Y; Prepost, R; S. L., W

doi:10.1103/PhysRevD.88.072006

We report a measurement of the branching fraction of the exclusive charmless semileptonic decay B+→ωℓ+ν, where ℓ is either an electron or a muon. We use samples of B+ mesons tagged by a reconstructed charmed semileptonic decay of the other B meson in the event. The measurement is based on a data set of 426.1 fb-1 of e+e- collisions at a center-of-mass energy of 10.58 GeV recorded with the BABAR detector at the PEP-II asymmetric-energy e +e- storage rings. We measure a branching fraction of B(B+→ωℓ+ν)=(1.35±0.21±0. 11)×10-4, where the uncertainties are statistical and systematic, respectively. We also present measurements of the partial branching fractions in three bins of q2, the invariant-mass squared of the lepton-neutrino system, and we compare them to theoretical predictions of the form factors.

Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2013). Measurement of the B+→ωℓ+ν branching fraction with semileptonically tagged B mesons. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 88(7) [10.1103/PhysRevD.88.072006].