Measurements of mean lifetime and branching fractions of b hadrons decaying to J/ψ

Buskulic, D; Decamp, D; Goy, C; Lees, J; Minard, M; Mours, B; Alemany, R; Ariztizabal, F; Comas, P; Crespo, J; Delfino, M; Fernandez, E; Gaitan, V; Garrido, L; Pacheco, A; Pascual, A; Creanza, D; Depalma, M; Farilla, A; Iaselli, G; Maggi, G; Maggi, M; Natali, S; Nuzzo, S; Quattromini, M; Ranieri, A; Raso, G; Romano, F; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Zito, G; H, H; Huang, D; Huang, X; Lin, J; Lou, J; Qiao, C; Wang, T; Xie, Y; D, X; R, X; Zhang, J; Zhao, W; Atwood, W; Lat, B; Blucher, E; Bonvicini, G; Bossi, F; Boudreau, J; Burnett, T; Drevermann, H; Forty, R; Hagelberg, R; Harvey, J; Haywood, S; Hilgart, J; Jacobsen, R; Jost, B; Knobloch, J; Lancon, E; Lehraus, I; Lohse, T; Lusiani, A; Martinez, M; Mato, P; Mattison, T; Meinhard, H; Menary, S; Meyer, T; Minten, A; Miquel, R; Moser, H; Palazzi, P; Perlas, J; Pusztaszeri, J; Ranjard, F; Redlinger, G; Rolandi, L; Roth, A; Rothberg, J; Ruan, T; Saich, M; Schlatter, D; Schmelling, M; Sefkow, F; Tejessy, W; Wachsmuth, H; Wiedenmann, W; Wildish, T; Witzeling, W; Wotschack, J; Ajaltouni, Z; Badaud, F; Bardadinotwinowska, M; Bencheikh, A; Elfellous, R; Falvard, A; Gay, P; Guicheney, C; Henrard, P; Jousset, J; Michel, B; Montret, J; Pallin, D; Perret, P; Pietrzyk, B; Proriol, J; Prulhiere, F; Stimpfl, G; Fearnley, T; Hansen, J; Hansen, J; Hansen, P; Mollerud, R; Nilsson, B; Efthymiopoulos, I; Kyriakis, A; Simopoulou, E; Vayaki, A; Zachariadou, K; Badier, J; Blondel, A; Bonneaud, G; Brient, J; Fouque, G; Orteu, S; Rosowsky, A; Rouge, A; Rumpf, M; Tanaka, R; Verderi, M; Videau, H; Candlin, D; Parsons, M; Veitch, E; Moneta, L; Parrini, G; Corden, M; Georgiopoulos, C; Ikeda, M; Lannutti, J; Levinthal, D; Mermikides, M; Sawyer, L; Wasserbaech, S; Antonelli, A; Baldini, R; Bencivenni, G; Bologna, G; Campana, P; Capon, G; Cerutti, F; Chiarella, V; Dettorrepiazzoli, B; Felici, G; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, G; Passalacqua, L; Pepealtarelli, M; Picchi, P; Altoon, B; Boyle, O; Colrain, P; Tenhave, I; Lynch, J; Maitland, W; Morton, W; Raine, C; Scarr, J; Smith, K; Thompson, A; Turnbull, R; Brandl, B; Braun, O; Geiges, R; Geweniger, C; Hanke, P; Hepp, V; Kluge, E; Maumary, Y; Putzer, A; Rensch, B; Stahl, A; Tittel, K; Wunsch, M; Belk, A; Beuselinck, R; Binnie, D; Cameron, W; Cattaneo, M; Colling, D; Dornan, P; Dugeay, S; Greene, A; Hassard, J; Lieske, N; Nash, J; Patton, S; Payne, D; Phillips, M; Sedgbeer, J; Tomalin, I; Wright, A; Kneringer, E; Kuhn, D; Rudolph, G; Bowdery, C; Brodbeck, T; Finch, A; Foster, F; Hughes, G; Jackson, D; Keemer, N; Nuttall, M; Patel, A; Sloan, T; Snow, S; Whelan, E; Kleinknecht, K; Raab, J; Renk, B; Sander, H; Schmidt, H; Steeg, F; Walther, S; Wolf, B; Aubert, J; Benchouk, C; Bernard, V; Bonissent, A; Carr, J; Coyle, P; Drinkard, J; Etienne, F; Papalexiou, S; Payre, P; Qian, Z; Rousseau, D; Schwemling, P; Talby, M; Adlung, S; Bauer, C; Blum, W; Brown, D; Cowan, G; Dehning, B; Dietl, H; Dydak, F; Fernandezbosman, M; Frank, M; Halley, A; Lauber, J; Lutjens, G; Lutz, G; Manner, W; Richter, R; Rotscheidt, H; Schroder, J; Schwarz, A; Settles, R; Seywerd, H; Stierlin, U; Stiegler, U; Stdenis, R; Takashima, M; Thomas, J; Wolf, G; Bertin, V; Boucrot, J; Callot, O; Chen, X; Cordier, A; Davier, M; Grivaz, J; Heusse, P; Janot, P; Kim, D; Lediberder, F; Lefrancois, J; Lutz, A; Schune, M; Veillet, J; Videau, I; Zhang, Z; Zomer, F; Abbaneo, D; Amendolia, S; Bagliesi, G; Batignani, G; Bosisio, L; Bottigli, U; Bradaschia, C; Carpinelli, M; Ciocci, M; Dellorso, R; Ferrante, I; Fidecaro, F; Foa, L; Focardi, E; Forti, F; Giassi, A; Giorgi, M; Ligabue, F; Mannelli, E; Marrocchesi, P; Messineo, A; Palla, F; Rizzo, G; Sanguinetti, G; Spagnolo, P; Steinberger, J; Tenchini, R; Tonelli, G; Triggiani, G; Vannini, C; Venturi, A; Verdini, P; Walsh, J; Carter, J; Green, M; March, P; Mir, L; Medcalf, T; Quazi, I; Strong, J; West, L; Botterill, D; Clifft, R; Edgecock, T; Edwards, M; Fisher, S; Jones, T; Norton, P; Salmon, D; Thompson, J; Blochdevaux, B; Colas, P; Duarte, H; Kozanecki, W; Lemaire, M; Locci, E; Loucatos, S; Monnier, E; Perez, P; Perrier, F; Rander, J; Renardy, J; Roussarie, A; Schuller, J; Schwindling, J; Mohand, D; Vallage, B; Johnson, R; Litke, A; Taylor, G; Wear, J; Ashman, J; Babbage, W; Booth, C; Buttar, C; Carney, R; Cartwright, S; Combley, F; Hatfield, F; Reeves, P; Thompson, L; Barberio, E; Bohrer, A; Brandt, S; Grupen, C; Mirabito, L; Rivera, F; Schafer, U; Ganis, G; Giannini, G; Gobbo, B; Ragusa, F; Bellantoni, L; Chen, W; Cinabro, D; Conway, J; Cowen, D; Feng, Z; Dps, F; Gao, Y; Grahl, J; Harton, J; Jared, R; Leclaire, B; Lishka, C; Pan, Y; Pater, J; Saadi, Y; Sharma, V; Schmitt, M; Shi, Z; Walsh, A; Weber, F; Whitney, M; Sl, W; X, W; Zobernig, G

doi:10.1016/0370-2693(92)91581-S

From a data sample of 450 000 hadronic events recorded with the ALEPH detector at LEP, 92±10 events are observed containing a J/ψ meson decaying to μ+μ- or e+e-. From these data the measured inclusive branching fraction for a b flavoured hadron to decay to a J/ψ is BR(b→ J/ψX) = (1.21±0.13 (stat.)±0.08 (syst.))%, and the average b hadron lifetime in the events tagged with a J/ψ is τb = 1.35+0.19 -0.17±0.05 ps. Five events are observed consistent with the exclusive decay B± → J/ψK± and from these events the exclusive branching fraction is measured to be BR(B± → J/ψK±) = (0.22±0.10±0.02)%. Upper limits for other exclusive branching ratios are given.

Buskulic, D., Decamp, D., Goy, C., Lees, J., Minard, M., Mours, B., et al. (1992). Measurements of mean lifetime and branching fractions of b hadrons decaying to J/ψ. PHYSICS LETTERS. SECTION B, 295(3-4), 396-408 [10.1016/0370-2693(92)91581-S].