Search For The Decays B-D(0)-]Gamma-Gamma And B-S(0)-]Gamma-Gamma
M. Acciarri,A. Adam,O. Adriani,M. Aguilar-Benitez,S. Ahlen,B. Alpat,J. Alcaraz,J. Allaby, A. Aloisio,G. Alverson,M.G. Alviggi, G. Ambrosi,H. Anderhub, V.P. Andreev,T. Angelescu,D. Antreasyan,A. Arefiev,T. Azemoon,T. Aziz, P. Bagnaia,L. Baksay,R.C. Ball,S. Banerjee,K. Banicz,R. Barillère, L. Barone,P. Bartalini,A. Baschirotto,M. Basile, R. Battiston, A. Bay,F. Becattini,U. Becker,F. Behner,Gy.L. Bencze,J. Berdugo,P. Berges,B. Bertucci,B.L. Betev, M. Biasini,A. Biland,G.M. Bilei,R. Bizzarri,J.J. Blaising,G.J. Bobbink,R. Bock,A. Böhm,B. Borgia,A. Boucham,D. Bourilkov,M. Bourquin, D. Boutigny,E. Brambilla,J.G. Branson,V. Brigljevic,I.C. Brock,A. Buijs,A. Bujak,J.D. Burger,W.J. Burger,C. Burgos,J. Busenitz,A. Buytenhuijs,X.D. Cai,M. Capell,G. Cara Romeo,M. Caria,G. Carlino,A.M. Cartacci,J. Casaus,G. Castellini,R. Castello, F. Cavallari,N. Cavallo,C. Cecchi,M. Cerrada,F. Cesaroni,M. Chamizo,A. Chan,Y.H. Chang,U.K. Chaturvedi,M. Chemarin,A. Chen, C. Chen,G. Chen,G.M. Chen,H.F. Chen,H.S. 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PHYSICS LETTERS B（1995）
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摘要
A search for the decays B-d,s(0) --> gamma gamma in 2.95 million hadronic 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: Br(B-d(0) --> gamma gamma) < 3.9 x 10(-5) and Br(B-s(0) --> gamma gamma) < 14.8 x 10(-5) at 90% CL. These are the first limits set on these exclusive rare decays.
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