Search for D 0 → p̄e + and D 0 → pe −

P. Rubin,N. Lowrey,S. Mehrabyan,M. Selen,J. Wiss,R. E. Mitchell,M. R. Shepherd,D. Besson,T. K. Pedlar,D. Cronin-Hennessy,K. Y. Gao,J. Hietala,Y. Kubota,T. Klein,R. Poling,A. W. Scott,P. Zweber,S. Dobbs,Z. Metreveli,K. K. Seth,B. J. Y. Tan,A. Tomaradze,J. Libby,L. Martin,A. Powell,G. Wilkinson,H. Mendez,J. Y. Ge,D. H. Miller,I. P. J. Shipsey,B. Xin,G. S. Adams,D. Hu,B. Moziak,J. Napolitano,K. M. Ecklund,Q. He,J. Insler,H. Muramatsu,C. S. Park,E. H. Thorndike,F. Yang,M. Artuso,S. Blusk,S. Khalil,J. Li,R. Mountain,K. Randrianarivony,N. Sultana,T. Skwarnicki,S. Stone,J. C. Wang,L. M. Zhang,G. Bonvicini,D. Cinabro,M. Dubrovin,A. Lincoln,M. J. Smith,P. Zhou,J. Zhu,P. Naik,J. Rademacker,D. M. Asner,K. W. Edwards,J. Reed,A. N. Robichaud,G. Tatishvili,E. J. White,R. A. Briere,H. Vogel,P. U. E. Onyisi,J. L. Rosner,J. P. Alexander,D. G. Cassel,J. E. Duboscq,R. Ehrlich,L. Fields,L. Gibbons,R. Gray,S. W. Gray,D. L. Hartill,B. K. Heltsley,D. Hertz,J. M. Hunt,J. Kandaswamy,D. L. Kreinick,V. E. Kuznetsov,J. Ledoux,H. Mahlke-Krüger,J. R. Patterson,D. Peterson,D. Riley,A. Ryd,A. J. Sadoff,X. Shi,S. Stroiney,W. M. Sun,T. Wilksen,J. Yelton

semanticscholar（2009）

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摘要

We search for baryon number violating decays of the D0 meson. Specifically, we use 281 pb−1 of data taken on the ψ(3770) resonance with CLEO-c detector at the CESR collider to look for decays D0 → p̄e+, D̄0 → p̄e+, D0 → pe− and D̄0 → pe−. We find no significant signals and set the following branching fraction upper limits: D0 → p̄e+(D̄0 → p̄e+) < 11.4 × 10−6 and D0 → pe−(D̄0 → pe−) < 10.2× 10−6, both at 90% confidence level.

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