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Search for neutral charmless B decays at LEP

A search for rare charmless decays of \Bd and \Bs mesons has been performed in the exclusive channels \Bd_{(\mathrm s)}\ra\eta\eta, \Bd_{(\mathrm s)}\ra\eta\pio and \Bd_{(\mathrm s)}\ra\pio\pio. The data sample consisted of three million hadronic \Zo decays collected by the L3 experiment at LEP from...

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Detalles Bibliográficos
Autores principales: Acciarri, M, Adam, A, Adriani, O, Aguilar-Benítez, M, Ahlen, S P, Alpat, B, Alcaraz, J, Allaby, James V, Aloisio, A, Alverson, G, Alviggi, M G, Ambrosi, G, Anderhub, H, Andreev, V P, Angelescu, T, Antreasyan, D, Arefev, A, Azemoon, T, Aziz, T, Bagnaia, P, Baksay, L, Ball, R C, Banerjee, S, Banicz, K, Barillère, R, Barone, L, Bartalini, P, Baschirotto, A, Basile, M, Battiston, R, Bay, A, Becattini, F, Becker, U, Behner, F, Bencze, G L, Berdugo, J, Berges, P, Bertucci, B, Betev, B L, Biasini, M, Biland, A, Bilei, G M, Bizzarri, R, Blaising, J J, Bobbink, Gerjan J, Böck, R K, Böhm, A, Borgia, B, Boucham, A, Bourilkov, D, Bourquin, Maurice, Boutigny, D, Brambilla, Elena, Branson, J G, Brigljevic, V, Brock, I C, Buijs, A, Bujak, A T, Burger, J D, Burger, W J, Burgos, C, Busenitz, J K, Buytenhuijs, A O, Cai, X D, Capell, M, Cara Romeo, G, Caria, M, Carlino, G, Cartacci, A M, Casaus, J, Castellini, G, Castello, R, Cavallari, F, Cavallo, N, Cecchi, C, Cerrada-Canales, M, Cesaroni, F, Chamizo-Llatas, M, Chan, A, Chang, Y H, Chaturvedi, U K, Chemarin, M, Chen, A, Chen, C, Chen, G, Chen, G M, Chen, H F, Chen, H S, Chen, M, Chiefari, G, Chien, C Y, Choi, M T, Cifarelli, Luisa, Cindolo, F, Civinini, C, Clare, I, Clare, R, Coan, T E, Cohn, H O, Coignet, G, Colijn, A P, Colino, N, Commichau, V, Costantini, S, Cotorobai, F, de la Cruz, B, Dai, T S, D'Alessandro, R, De Asmundis, R, De Boeck, H, Degré, A, Deiters, K, Dénes, E, Denes, P, De Notaristefani, F, DiBitonto, Daryl, Diemoz, M, Van Dierendonck, D N, Di Lodovico, F, Dionisi, C, Dittmar, Michael, Dominguez, A, Doria, A, Dorne, I, Dova, M T, Drago, E, Duchesneau, D, Duinker, P, Durán, I, Dutta, S, Easo, S, Efremenko, Yu V, El-Mamouni, H, Engler, A, Eppling, F J, Erné, F C, Ernenwein, J P, Extermann, Pierre, Fabbretti, R, Fabre, M, Faccini, R, Falciano, S, Favara, A, Fay, J, Felcini, Marta, Ferguson, T, Fernández, D, Fernández, G, Ferroni, F, Fesefeldt, H S, Fiandrini, E, Field, J H, Filthaut, Frank, Fisher, P H, Forconi, G, Fredj, L, Freudenreich, Klaus, Gailloud, M, Galaktionov, Yu, Ganguli, S N, García-Abia, P, Gau, S S, Gentile, S, Gerald, J, Gheordanescu, N, Giagu, S, Goldfarb, S, Goldstein, J, Gong, Z F, González, E, Gougas, Andreas, Goujon, D, Gratta, Giorgio, Grünewald, M W, Gupta, V K, Gurtu, A, Gustafson, H R, Gutay, L J, Hartmann, B, Hasan, A, He, J T, Hebbeker, T, Hervé, A, Hilgers, K, Van Hoek, W C, Hofer, H, Hoorani, H, Hou, S R, Hu, G, Ilyas, M M, Innocente, Vincenzo, Janssen, H, Jin, B N, Jones, L W, de Jong, P, Josa-Mutuberria, I, Kasser, A, Khan, R A, Kamyshkov, Yu A, Kapinos, P, Kapustinsky, J S, Karyotakis, Yu, Kaur, M, Kienzle-Focacci, M N, Kim, D, Kim, J K, Kim, S C, Kim, Y G, Kinnison, W W, Kirkby, A, Kirkby, D, Kirkby, Jasper, Kittel, E W, Klimentov, A, König, A C, Koffeman, E, Kornadt, O, Koutsenko, V F, Koulbardis, A, Krämer, R W, Kramer, T, Krenz, W, Kuijten, H, Kunin, A, Ladrón de Guevara, P, Landi, G, Lapoint, C, Lassila-Perini, K M, Laurikainen, P, Lebeau, M, Lebedev, A, Lebrun, P, Lecomte, P, Lecoq, P, Le Coultre, P, Lee Jae Sik, Lee, K Y, Leggett, C, Le Goff, J M, Leiste, R, Lenti, M, Leonardi, E, Levchenko, P M, Li Chuan, Lieb, E H, Lin, W T, Linde, Frank L, Lindemann, B, Lista, L, Liu, Z A, Lohmann, W, Longo, E, Lu, W, Lü, Y S, Lübelsmeyer, K, Luci, C, Luckey, D, Ludovici, L, Luminari, L, Lustermann, W, Ma Wen Gan, Macchiolo, A, Maity, M, Malgeri, L, Malinin, A, Maña, C, Mangla, S, Maolinbay, M, Marchesini, P A, Marin, A, Martin, J P, Marzano, F, Massaro, G G G, Mazumdar, K, McNally, D, Mele, S, Merola, L, Meschini, M, Metzger, W J, Mi, Y, Mihul, A, Van Mil, A J W, Mirabelli, G, Mnich, J, Möller, M, Monteleoni, B, Moore, R, Morand, R, Morganti, S, Mount, R, Müller, S, Muheim, F, Nagy, E, Nahn, S, Napolitano, M, Nessi-Tedaldi, F, Newman, H, Nippe, A, Nowak, H, Organtini, G, Ostonen, R, Pandoulas, D, Paoletti, S, Paolucci, P, Pascale, G, Passaleva, G, Patricelli, S, Paul, T, Pauluzzi, M, Paus, C, Pauss, Felicitas, Pei, Y J, Pensotti, S, Perret-Gallix, D, Petrak, S, Pevsner, A, Piccolo, D, Pieri, M, Pinto, J C, Piroué, P A, Pistolesi, E, Plyaskin, V, Pohl, M, Pozhidaev, V, Postema, H, Produit, N, Raghavan, R, Rahal-Callot, G, Rancoita, P G, Rattaggi, M, Raven, G, Razis, P A, Read, K, Redaelli, M, Ren, D, Rescigno, M, Reucroft, S, Ricker, A, Riemann, S, Riemers, B C, Riles, K, Rind, O, Ro, S, Robohm, A, Rodin, J, Rodríguez-Calonge, F J, Roe, B P, Röhner, M, Röhner, S, Romero, L, Rosier-Lees, S, Rosselet, P, Van Rossum, W, Roth, S, Rubio, Juan Antonio, Rykaczewski, H, Salicio, J, Salicio, J M, Sánchez, E, Santocchia, A, Sarakinos, M E, Sarkar, S, Sassowsky, M, Sauvage, G, Schäfer, C, Shchegelskii, V, Schmitz, D, Schmitz, P, Schneegans, M, Schöneich, B, Scholz, N, Schopper, Herwig Franz, Schotanus, D J, Schulte, R, Schultze, K, Schwenke, J, Schwering, G, Sciacca, C, Seiler, P G, Sens, Johannes C, Servoli, L, Shevchenko, S, Shivarov, N, Shoutko, V, Shukla, J, Shumilov, E, Son, D, Sopczak, André, Soulimov, V, Smith, B, Spickermann, T, Spillantini, P, Steuer, M, Stickland, D P, Sticozzi, F, Stone, H, Stoyanov, B, Strauch, K, Sudhakar, K, Sultanov, G G, Sun, L Z, Susinno, G F, Suter, H, Swain, J D, Tang, X W, Tauscher, Ludwig, Taylor, L, Ting, C C, Ting, S M, Toker, O, Tonisch, F, Tonutti, M, Tonwar, S C, Tóth, J, Tsaregorodtsev, A Yu, Tsipolitis, G, Tully, C, Tuchscherer, H, Ulbricht, J, Urbàn, L, Uwer, U, Valente, E, Van de Walle, R T, Vetlitskii, I, Viertel, Gert M, Vivargent, M, Völkert, R, Vogel, H, Vogt, H, Vorobev, I, Vorobyov, A A, Vuilleumier, L, Wadhwa, M, Wallraff, W, Wang, J C, Wang, X L, Wang, Y F, Wang, Z M, Weber, A, Weill, R, Willmott, C, Wittgenstein, F, Wu, S X, Wynhoff, S, Xu, J, Xu, Z Z, Yang, B Z, Yang, C G, Yao, X Y, Ye, J B, Yeh, S C, You, J M, Zaccardelli, C, Zalite, A, Zemp, P, Zeng, J Y, Zeng, Y, Zhang, Z, Zhang, Z P, Zhou, B, Zhou, G J, Zhou, J F, Zhou, Y, Zhu, G Y, Zhu, R Y, Zichichi, Antonino, Van der Zwaan, B C C
Lenguaje:eng
Publicado: 1995
Materias:
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(95)01042-O
http://cds.cern.ch/record/288280
Descripción
Sumario:A search for rare charmless decays of \Bd and \Bs mesons has been performed in the exclusive channels \Bd_{(\mathrm s)}\ra\eta\eta, \Bd_{(\mathrm s)}\ra\eta\pio and \Bd_{(\mathrm s)}\ra\pio\pio. The data sample consisted of three million hadronic \Zo decays collected by the L3 experiment at LEP from 1991 through 1994. No candidate event has been observed and the following upper limits at 90\% confidence level on the branching ratios have been set \begin{displaymath} \mathrm{Br}(\Bd\ra\eta\eta)<4.1\times 10^{-4},\,\, \mathrm{Br}(\Bs\ra\eta\eta)<1.5\times 10^{-3},\,\, \end{displaymath} \begin{displaymath} \mathrm{Br}(\Bd\ra\eta\pio)<2.5\times 10^{-4},\,\, \mathrm{Br}(\Bs\ra\eta\pio)<1.0\times 10^{-3},\,\, \end{displaymath} \begin{displaymath} \mathrm{Br}(\Bd\ra\pio\pio)<6.0\times 10^{-5},\,\, \mathrm{Br}(\Bs\ra\pio\pio)<2.1\times 10^{-4}. \end{displaymath} These are the first experimental limits on \Bd\ra\eta\eta and on the \Bs neutral charmless modes.