Search For B-0 ->Pi(0) Pi(0) Decay

D. Asner,A. Eppich,T. Hill,R. Morrison,R. Briere, G. Chen,T. Ferguson,H. Vogel,A. Gritsan, J. Alexander,R. Baker,C. Bebek,B. Berger,K. Berkelman, F. Blanc, V. Boisvert,D. Cassel, P. Drell,J. Duboscq,K. Ecklund,R. Ehrlich,P. Gaidarev, L. Gibbons,B. Gittelman, S. Gray,D. Hartill,B. Heltsley,P. Hopman,L. Hsu,C. Jones,J. Kandaswamy,D. Kreinick,M. Lohner,A. Magerkurth,T. Meyer,N. Mistry,E. Nordberg,M. Palmer,J. Patterson, D. Peterson, D. Riley,A. Romano,J. Thayer,D. Urner,B. Valant-Spaight,G. Viehhauser,A. Warburton, P. Avery,C. Prescott,A. Rubiera,H. Stoeck, J. Yelton, G. Brandenburg, A. Ershov,D. Kim, R. Wilson,T. Bergfeld,B. Eisenstein, J. Ernst,G. Gladding,G. Gollin,R. Hans,E. Johnson,I. Karliner,M. Marsh, C. Plager,C. Sedlack,M. Selen,J. Thaler,J. Williams, K. Edwards,R. Janicek,P. Patel,A. Sadoff,R. Ammar,A. Bean, D. Besson,X. Zhao,S. Anderson,V. Frolov,Y. Kubota, S. Lee,J. O’Neill,R. Poling,T. Riehle,A. Smith,C. Stepaniak,J. Urheim,S. Ahmed,M. Alam,S. Athar, L. Jian,L. Ling, M. Saleem,S. Timm,F. Wappler, A. Anastassov,E. Eckhart,K. Gan, C. Gwon,T. Hart,K. Honscheid,D. Hufnagel,H. Kagan, R. Kass,T. Pedlar,H. Schwarthoff,J. Thayer, E. von Toerne,M. Zoeller,S. Richichi, H. Severini, P. Skubic, A. Undrus, V. Savinov,S. Chen,J. Fast,J. Hinson,J. Lee,D. Miller,E. Shibata,I. Shipsey,V. Pavlunin, D. Cronin-Hennessy,A. Lyon,E. Thorndike,T. Coan,V. Fadeyev, Y. Gao, Y. Maravin,I. Narsky, R. Stroynowski,J. Ye,T. Wlodek,M. Artuso, C. Boulahouache,K. Bukin,E. Dambasuren, G. Majumder,R. Mountain,S. Schuh, T. Skwarnicki,S. Stone, J. Wang, A. Wolf, J. Wu,S. Kopp,M. Kostin,A. Mahmood, S. Csorna,I. Danko,K. McLean, Z. Xu, R. Godang,G. Bonvicini,D. Cinabro,M. Dubrovin,S. McGee,G. Zhou, A. Bornheim, E. Lipeles,S. Pappas,M. Schmidtler,A. Shapiro, W. Sun,A. Weinstein,D. Jaffe,R. Mahapatra,G. Masek, H. Paar

PHYSICAL REVIEW D(2002)

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Abstract
We have searched for the charmless hadronic decay of B-0 mesons into two neutral pions. Using 9.13 fb(-1) taken at the Y(4S) with the CLEO detector, we obtain an improved upper limit for the branching fraction B(B-0-->pi(0)pi(0)) < 5.7 x 10(-6) at the 90% confidence level.
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Key words
confidence level,time reversal
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