We search for the rare flavor-changing neutral current process B+→K+τ+τ- using data from the BABAR experiment. The data sample, collected at the center-of-mass energy of the (4S) resonance, corresponds to a total integrated luminosity of 424 fb-1 and to 471×106 BB pairs. We reconstruct one B meson, produced in the (4S)→B+B- decay, in one of many hadronic decay modes and search for activity compatible with a B+→K+τ+τ- decay in the rest of the event. Each τ lepton is required to decay leptonically into an electron or muon and neutrinos. Comparing the expected number of background events with the data sample after applying the selection criteria, we do not find evidence for a signal. The resulting upper limit, at the 90% confidence level, is B(B+→K+τ+τ-)<2.25×10-3.

Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2017). Search for B+ →k+τ+τ- at the BaBar Experiment. PHYSICAL REVIEW LETTERS, 118(3) [10.1103/PhysRevLett.118.031802].

Search for B+ →k+τ+τ- at the BaBar Experiment

CARPINELLI, Massimo
Membro del Collaboration Group
;
2017

Abstract

We search for the rare flavor-changing neutral current process B+→K+τ+τ- using data from the BABAR experiment. The data sample, collected at the center-of-mass energy of the (4S) resonance, corresponds to a total integrated luminosity of 424 fb-1 and to 471×106 BB pairs. We reconstruct one B meson, produced in the (4S)→B+B- decay, in one of many hadronic decay modes and search for activity compatible with a B+→K+τ+τ- decay in the rest of the event. Each τ lepton is required to decay leptonically into an electron or muon and neutrinos. Comparing the expected number of background events with the data sample after applying the selection criteria, we do not find evidence for a signal. The resulting upper limit, at the 90% confidence level, is B(B+→K+τ+τ-)<2.25×10-3.
Articolo in rivista - Articolo scientifico
Physics and Astronomy (all)
English
Carpinelli Massimo (BaBar Collaboration)
Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2017). Search for B+ →k+τ+τ- at the BaBar Experiment. PHYSICAL REVIEW LETTERS, 118(3) [10.1103/PhysRevLett.118.031802].
Lees, J; Poireau, V; Tisserand, V; Grauges, E; Palano, A; Eigen, G; Brown, D; Kolomensky, Y; Koch, H; Schroeder, T; Hearty, C; Mattison, T; Mckenna, J; So, R; Blinov, V; Buzykaev, A; Druzhinin, V; Golubev, V; Kravchenko, E; Onuchin, A; Serednyakov, S; Skovpen, Y; Solodov, E; Todyshev, K; Lankford, A; Gary, J; Long, O; Eisner, A; Lockman, W; Panduro Vazquez, W; Chao, D; Cheng, C; Echenard, B; Flood, K; Hitlin, D; Kim, J; Miyashita, T; Ongmongkolkul, P; Porter, F; Röhrken, M; Huard, Z; Meadows, B; Pushpawela, B; Sokoloff, M; Sun, L; Smith, J; Wagner, S; Bernard, D; Verderi, M; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Fioravanti, E; Garzia, I; Luppi, E; Santoro, V; Calcaterra, A; De Sangro, R; Finocchiaro, G; Martellotti, S; Patteri, P; Peruzzi, I; Piccolo, M; Zallo, A; Passaggio, S; Patrignani, C; Bhuyan, B; Mallik, U; Chen, C; Cochran, J; Prell, S; Ahmed, H; Gritsan, A; Arnaud, N; Davier, M; Le Diberder, F; Lutz, A; Wormser, G; Lange, D; Wright, D; Coleman, J; Gabathuler, E; Hutchcroft, D; Payne, D; Touramanis, C; Bevan, A; Di Lodovico, F; Sacco, R; Cowan, G; Banerjee, S; Brown, D; Davis, C; Denig, A; Fritsch, M; Gradl, W; Griessinger, K; Hafner, A; Schubert, K; Barlow, R; Lafferty, G; Cenci, R; Jawahery, A; Roberts, D; Cowan, R; Cheaib, R; Robertson, S; Dey, B; Neri, N; Palombo, F; Cremaldi, L; Godang, R; Summers, D; Taras, P; De Nardo, G; Sciacca, C; Raven, G; Jessop, C; Losecco, J; Honscheid, K; Kass, R; Gaz, A; Margoni, M; Posocco, M; Rotondo, M; Simi, G; Simonetto, F; Stroili, R; Akar, S; Ben Haim, E; Bomben, M; Bonneaud, G; Calderini, G; Chauveau, J; Marchiori, G; Ocariz, J; Biasini, M; Manoni, E; Rossi, A; Batignani, G; Bettarini, S; Carpinelli, M; Casarosa, G; Chrzaszcz, M; Forti, F; Giorgi, M; Lusiani, A; Oberhof, B; Paoloni, E; Rama, M; Rizzo, G; Walsh, J; Smith, A; Anulli, F; Faccini, R; Ferrarotto, F; Ferroni, F; Pilloni, A; Piredda, G; Bünger, C; Dittrich, S; Grünberg, O; Heß, M; Leddig, T; Voß, C; Waldi, R; Adye, T; Wilson, F; Emery, S; Vasseur, G; Aston, D; Cartaro, C; Convery, M; Dorfan, J; Dunwoodie, W; Ebert, M; Field, R; Fulsom, B; Graham, M; Hast, C; Innes, W; Kim, P; Leith, D; Luitz, S; Luth, V; Macfarlane, D; Muller, D; Neal, H; Ratcliff, B; Roodman, A; Sullivan, M; Va'Vra, J; Wisniewski, W; Purohit, M; Wilson, J; Randle Conde, A; Sekula, S; Bellis, M; Burchat, P; Puccio, E; Alam, M; Ernst, J; Gorodeisky, R; Guttman, N; Peimer, D; Soffer, A; Spanier, S; Ritchie, J; Schwitters, R; Izen, J; Lou, X; Bianchi, F; De Mori, F; Filippi, A; Gamba, D; Lanceri, L; Vitale, L; Martinez Vidal, F; Oyanguren, A; Albert, J; Beaulieu, A; Bernlochner, F; King, G; Kowalewski, R; Lueck, T; Nugent, I; Roney, J; Tasneem, N; Gershon, T; Harrison, P; Latham, T; Prepost, R; Wu, S
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