Observation of High Momentum Η Typeset Using Revt E X
T. E. Browder,Y. Li,J. L. Rodriguez,T. Bergfeld,B. I. Eisenstein,J. Ernst,G. E. Gladding,G. D. Gollin,R. M. Hans,E. Johnson,I. Karliner,M. A. Marsh,M. Palmer,M. Selen,J. J. Thaler,K. W. Edwards,A. Bellerive,R. Janicek,D. B. MacFarlane,P. M. Patel,A. J. Sadoff,R. Ammar,P. Baringer,A. Bean,D. Besson,D. Coppage,C. Darling,R. Davis,S. Kotov,I. Kravchenko,N. Kwak,L. Zhou,S. Anderson,Y. Kubota,S. J. Lee,J. J. O’Neill,R. Poling,T. Riehle,A. Smith,M. S. Alam,S. B. Athar,Z. Ling,A. H. Mahmood,S. Timm,F. Wappler,A. Anastassov,J. E. Duboscq,D. Fujino,K. K. Gan,T. Hart,K. Honscheid,H. Kagan,R. Kass,J. Lee,M. B. Spencer,M. Sung,A. Undrus,A. Wolf,M. M. Zoeller,B. Nemati,S. J. Richichi,W. R. Ross,H. Severini,P. Skubic,M. Bishai,J. Fast,J. W. Hinson,N. Menon,D. H. Miller,E. I. Shibata,I. P. J. Shipsey,M. Yurko,S. Glenn,Y. Kwon,A. L. Lyon,S. Roberts,E. H. Thorndike,C. P. Jessop,K. Lingel,H. Marsiske,M. L. Perl,V. Savinov,D. Ugolini,X. Zhou,T. E. Coan,V. Fadeyev,I. Korolkov,Y. Maravin,I. Narsky,V. Shelkov,J. Staeck,R. Stroynowski,I. Volobouev,J. Ye,M. Artuso,F. Azfar,A. Efimov,M. Goldberg,D. He,S. Kopp,G. C. Moneti,R. Mountain,S. Schuh,T. Skwarnicki,S. Stone,G. Viehhauser,J. C. Wang,X. Xing,J. Bartelt,S. E. Csorna,V. Jain,K. W. McLean,S. Marka,R. Godang,K. Kinoshita,I. C. Lai,P. Pomianowski,S. Schrenk,G. Bonvicini,D. Cinabro,R. Greene,L. P. Perera,G. J. Zhou,M. Chadha,S. Chan,G. Eigen,J. S. Miller,M. Schmidtler,J. Urheim,A. J. Weinstein,F. Würthwein,D. W. Bliss,G. Masek,H. P. Paar,S. Prell,V. Sharma,D. M. Asner,J. Gronberg,T. S. Hill,D. J. Lange,R. J. Morrison,H. N. Nelson,T. K. Nelson,D. Roberts,B. H. Behrens,W. T. Ford,A. Gritsan,J. Roy,J. G. Smith,J. P. Alexander,R. Baker,C. Bebek,B. E. Berger,K. Berkelman,K. Bloom,V. Boisvert,D. G. Cassel,D. S. Crowcroft,M. Dickson,S. von Dombrowski,P. S. Drell,K. M. Ecklund,R. Ehrlich,A. D. Foland,P. Gaidarev,L. Gibbons,B. Gittelman,S. W. Gray,D. L. Hartill,B. K. Heltsley,P. I. Hopman,J. Kandaswamy,P. C. Kim,D. L. Kreinick,T. Lee,Y. Liu,N. B. Mistry,C. R. Ng,E. Nordberg,M. Ogg,J. R. Patterson,D. Peterson,D. Riley,A. Soffer,B. Valant-Spaight,C. Ward,M. Athanas,P. Avery,C. D. Jones,M. Lohner,S. Patton,C. Prescott,J. Yelton,J. Zheng,G. Brandenburg,R. A. Briere,A. Ershov,Y. S. Gao,D. Y.-J. Kim,R. Wilson,H. Yamamoto
semanticscholar（2008）
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摘要
We report the first observation of B → ηX transitions with high momentum η mesons. We observe 39.0 ± 11.6 B decay events with 2.0 < pη′ < 2.7 GeV/c, the high momentum region where background from b → c processes is suppressed. We discuss the physical interpretation of the signal, including the possibility that it is due to b → sg transitions. Given that interpretation, we find B(B → ηXs) = (6.2 ± 1.6(stat) ± 1.3(sys) +0.0 −1.5(bkg)) × 10 −4 for 2.0 < pη′ < 2.7 GeV/c. Typeset using REVTEX
