Study of High Momentumη′Production Inb→η′xs
B. Aubert,R. Barate,D. Boutigny,F. Couderc,J.-M. Gaillard,A. Hicheur,Y. Karyotakis,J. P. Lees,V. Tisserand,A. Zghiche, A. Palano,A. Pompili,J. C. Chen,N. D. Qi, G. Rong, P. Wang, Y. S. Zhu,G. Eigen,I. Ofte,B. Stugu,G. S. Abrams,A. W. Borgland,A. B. Breon,D. N. Brown,J. Button-Shafer,R. N. Cahn,E. Charles,C. T. Day,M. S. Gill,A. V. Gritsan,Y. Groysman,R. G. Jacobsen,R. W. Kadel,J. Kadyk,L. T. Kerth,Yu. G. Kolomensky,G. Kukartsev,C. LeClerc,M. E. Levi,G. Lynch,L. M. Mir,P. J. Oddone,T. J. Orimoto,M. Pripstein,N. A. Roe,M. T. Ronan,V. G. Shelkov,A. V. Telnov,W. A. Wenzel,K. Ford,T. J. Harrison,C. M. Hawkes, S. E. Morgan,A. T. Watson,N. K. Watson,M. Fritsch,K. Goetzen,T. Held,H. Koch,B. Lewandowski,M. Pelizaeus,K. Peters,H. Schmuecker,M. Steinke,J. T. Boyd,N. Chevalier,W. N. Cottingham,M. P. Kelly,T. E. Latham,C. Mackay,F. F. Wilson,K. Abe,T. Cuhadar-Donszelmann,C. Hearty,T. S. Mattison,J. A. McKenna,D. Thiessen,P. Kyberd,A. K. McKemey,L. Teodorescu,V. E. Blinov,A. D. Bukin,V. B. 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Li,R. Liu,F. Di Lodovico,A. Mihalyi,A. K. Mohapatra,Y. Pan, R. Prepost,S. J. Sekula,J. H. von Wimmersperg-Toeller,J. Wu,S. L. Wu,Z. Yu,H. Neal
Physical Review Letters（2004）
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摘要
We measure the branching fraction for the charmless semi-inclusive process B --> eta'Xs, where the eta' meson has a momentum in the range 2.0 to 2.7 GeV/c in the upsilon4S center-of-mass frame and Xs represents a system comprising a kaon and zero to four pions. We find B(B --> eta'Xs) = [3.9 +/- 0.8(stat) +/- 0.5(syst) +/- 0.8(model)] x 10(-4). We also obtain the Xs mass spectrum and find that it fits models predicting high masses.
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