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Search for the decays B$_{d}^{0}$ --> $\gamma\gamma$ and B$_{s}^{0}$ --> $\gamma\gamma$

A search for the decays \Bdsgg in 2.95 million hadronic \rm Z decays has been performed using the L3 detector at LEP. No candidates are found in the signal region and upper limits have been set on the branching ratios: \Brdgg < 3.9\times 10^{-5} and \Brsgg < 14.8\times 10^{-5} at 90\% CL. Thes...

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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, 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Lenguaje:eng
Publicado: 1995
Materias:
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(95)01224-E
http://cds.cern.ch/record/289193
Descripción
Sumario:A search for the decays \Bdsgg in 2.95 million hadronic \rm Z decays has been performed using the L3 detector at LEP. No candidates are found in the signal region and upper limits have been set on the branching ratios: \Brdgg < 3.9\times 10^{-5} and \Brsgg < 14.8\times 10^{-5} at 90\% CL. These are the first limits set on these exclusive rare decays.