Direct measurement of B ( D s + → φ X + )

Jun Yan,W G Yan,X L Fan,W Dunwoodie,H S Zhou,Z Z Du, Lisha Zhou,H L Ding,X Z Cui,R Cowan,B S Cheng,C Y Yang,Y B Chen,S M Chen, Xue Feng Zhou, Hui Yang,Wenxiu Yang,M H Ye,S Z Ye, Kairu Young,Y H Zhou,Q M Zhu,Y C Zhu,B A Zhuang,C X Yu,Z Q Yu,B Y Zhang,C C Zhang,D H Zhang, Hai Lin Zhang,J W Zhang,O Bardon,I Blum,C Z Yuan,P Q Li,Jinsong Li,Fengrong Li,A J Lankford,P F Lang,D Z Xu,R S Xu,Z Q Xu,Jiayuan Fang,J Z Bai,S T Xue,F A Harris, Yi Han,S W Han,Y N Guo,Y F Gu,W X Gu,Y Y Zhang,D X Zhao,J W Zhao,Ming Zhao,W R Zhao,J P Zheng,L S Zheng,S D Gu,J H Gu,P Gratton,D P Stoker,Z P Zheng,Fei Sun,H S Sun,S J Sun,J Synodinos,Y P Tan,S Q Tang,W H Toki,G L Tong, Fosong Wang,L Z Wang,Mei Wang,P L Wang,S M Wang,G P Zhou,S Q Gao,M L Gao,C S Gao,Thomas J Wang,Y Y Wang,Michael N Weaver,C L Wei,W J Wisniewski,D M Xi,X M Xia,P P Xie,J Nie,S L Olsen,J Oyang,D Paluselli,L J Pan,J Panetta,F C Porter,E Prabhakar,N D Qi,Y K Que,G Rong,M Schernau,B Schmid,J Schultz,Jianyang Chen,H L Ni,X C Meng,Z P Mao,H S Mao,M Mandelkern,H F Chen,Y Y Shao,L S Zhang,D L Shen,R L Malchow,J M Ma,E C Ma,A M Ma, Yana Luo,Shenqiu Luo,J G Lu,B Lowery,X C Lou,Z A Liu, Yi Liu,R G Liu,Qingwei Liu,J H Liu,H M Liu,S Z Lin,X N Li,W D Li,R B Li,Q Li,H B Lan,Y F Lai,Dehui Kong,B K Kim,M H Kelsey,H Shen,S Q Zhang,Z J Ke,X Y Shen,H Y Sheng,S H Kang,H Z Shi,E Soderstrom,X F Song,L W Jones,Ying Jin,S Jin,C H Jiang,J M Izen,Y Z Huang,D Q Huang,X Q Hu,Tao Hu,G Y Hu,D G Hitlin,M He,Junfeng He,A Breakstone,T H Burnett,G P Chen,J Standifird

Physical Review D - Particles, Fields, Gravitation and Cosmology（1998）

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摘要

The absolute inclusive branching fraction of Ds +→φX+ has been measured from data collected by the BES detector at a center-of-mass energy of 4.03 GeV, corresponding to an integrated luminosity of 22.3 pb-1. At this energy, direct pair production e+e-→Ds +Ds - has been observed. We have selected Ds. candidate events by reconstructing five hadronic decay modes Ds +→φπ+,K̄ 0*K+,K̄0K+,f 0π+ and K0K-π+π+ and have searched for inclusive φ's in the recoiling Ds - . We observed three recoiling φ's in the 166.4 ± 31.8 Ds candidate events, which leads to the absolute branching fraction B(Ds +→φX+)=(17.8-7.2 -6.3 +15.1 +0.6) % and B(Ds +→φπ+)=(3.6-1.6 -1.3 +3.1 +0.4) %.

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