Measurement ofDs+andDs*+production inBmeson decays and from continuume+e−annihilation ats=10.6GeV

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,L Lista,V Blinov ,I Scott,G Simi,J Panetta,Y B Pan ,H Singh,J Walsh,J Schieck ,X Lou ,A R Clark,D N Brown,M.e Huffer ,T.m.b Kordich ,S Dasu,S Bagnasco,F X Yumiceva,И Адам ,S Versillé,K C Moffeit,D.e Azzopardi ,A J S Smith,S Jolly,U Langenegger,D Johnson ,M Margoni,H Hu,Z Yu,P David,W.a Wenzel ,H Koch,P Robbe,K Baird,M.g Pia ,G Hamel De Monchenault,L Cremaldi,E.d Frank ,A A Grillo,S Rahatlou ,G Sciolla,P.b Vidal ,E W Varnes,Helen R Quinn ,Ch De La Vaissière ,M S Witherell ,M Bóna ,P Elmer,P Bright-Thomas ,S Mcmahon,R C Field,A Soha,M Morandin,J A Kadyk ,Ch Thiebaux ,B Meadows ,C P O’Grady,V.v Serbo ,M Steinke,M Kay,F Ë Taylor ,C.a Heusch ,Ph Leruste ,A Farbin,F Jackson,V E Özcan ,R Liu,P Paolucci,S Metzler,M E Levi,P Grosso,S Yellin,A Rýd ,J R Johnson,P Sanders,D Müller ,P A Hart,F Fabozzi,B A Schumm,J.y Nief ,R Waldi,C Lü ,E Leonardi,М Перл ,A Pompili,S Xella ,J Stark,R Müller-Pfefferkorn,Ch Yèche ,D M Wright,S Tosi,J Tinslay,S W O’Neale,M Grothe,P Wang,P F Giraud ,D.a Bukin ,W Bugg,M 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,G Godfrey ,D E Dorfan,V Lüth ,W Walkowiak,P Kim,M R Monge,J Cochran,W Verkerke,R.j Sloane ,F Pastore ,R Kofler,J Cohen-Tanugi,C K Mackay ,J.f Kral ,L Roos,H A Neal

doi:10.1103/physrevd.65.091104

Abstract

New measurements of Ds+ and Ds*+ meson production rates from B decays and from qqbar continuum events near the Y(4S) resonance are presented. Using 20.8 fb-1 of data on the Y(4S) resonance and 2.6 fb-1 off resonance, we find the inclusive branching fractions BR(B --> Ds+ X) = (10.93+/-0.19+/-0.58+/-2.73)% and BR(B --> Ds*+ X) = (7.9+/-0.8+/-0.7+/-2.0)%, where the first error is statistical, the second is systematic, and the third is due to the Ds+ --> phi pi+ branching fraction uncertainty. The branching fractions SumBR(B --> Ds(*)+ Dbar(*)) = (5.07+/-0.14+/-0.30+/-1.27)% and SumBR(B --> Ds*+ Dbar(*)) = (4.1+/-0.2+/-0.4+/-1.0)% are determined from the Ds(*)+ momentum spectra.

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