Direct Measurement of Thedsbranching Fraction to Φπ

JZ Bai,O Bardon,I Blum,A Breakstone,T Burnett,GP Chen,HF Chen,J Chen,SJ Chen,SM Chen,Y Chen,YB Chen,YQ Chen,BS Cheng,RF Cowan,HC Cui,XZ Cui,HL Ding,ZZ Du,W Dunwoodie,XL Fan,J Fang,M Fero,CS Gao,ML Gao,SQ Gao,WX Gao,P Gratton,JH Gu,SD Gu,WX Gu,YF Gu,YN Guo,SW Han,Y Han,FA Harris,M Hatanaka,J He,KR He,M He,DG Hitlin,GY Hu,HB Hu,T Hu,XQ Hu,DQ Huang,YZ Huang,JM Izen,QP Jia,CH Jiang,Y Jin,L Jones,SH Kang,MH Kelsey,BK Kim,YF Lai,HB Lan,PF Lang,A Lankford,F Li,J Li,PQ Li,Q Li,RB Li,W Li,WD Li,WG Li,X Li,XN Li,SZ Lin,HM Liu,JH Liu,Q Liu,RG Liu, Y Liu,ZA Liu,XC Lou,B Lowery,JG Lu,AM Ma,EC Ma,JM Ma,HS Mao,ZP Mao,R Malchow,M Mandelkern,XC Meng,HL Ni, J Nie,SL Olsen,J Oyang,D Paluselli,LJ Pan,J Panetta,F Porter,E Prabhakar,ND Qi,YK Que,J Quigley,G Rong,M Schernau,B Schmid,J Schultz,YY Shao,DL Shen,H Shen,XY Shen,HY Sheng,HZ Shi,XR Shi,A Smith,E Soderstrom,XF Song,J Standifird,D Stoker,F Sun,HS Sun,SJ Sun, J Synodinos,YP Tan,SQ Tang,W Toki,GL Tong,E Torrence,F Wang,LS Wang,LZ Wang,M Wang,P Wang,PL Wang, SM Wang,TJ Wang,W Wang,YY Wang,S Whittaker,R Wilson,WJ Wisniewski,DM Xi,XM Xia,PP Xie,DZ Xu,RS Xu,ZQ Xu,ST Xue,R Yamamoto,J Yan,WG Yan,CM Yang,CY Yang,W Yang,HB Yao,MH Ye,SZ Ye,CS Yu,CX Yu,ZQ Yu,CZ Yuan,BY Zhang,CC Zhang,DH Zhang,HL Zhang,J Zhang,JW Zhang,LS Zhang,SQ Zhang,Y Zhang,YY Zhang,DX Zhao,JW Zhao,M Zhao,PD Zhao,WR Zhao,WX Zhao,JP Zheng,LS Zheng, ZP Zheng,GP Zhou,HS Zhou,L Zhou,XF Zhou,YH Zhou,QM Zhu,YC Zhu,YS Zhu,BA Zhuang,G Zioulas

Physical review D Particles, fields, gravitation, and cosmology/Physical review D Particles and fields（1995）

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摘要

The Beijing Spectrometer (BES) Collaboration has observed exclusive pair production of D-s mesons at the Beijing Electron-Positron Collider (BEPC) at a center-of-mass energy of 4.03 GeV. The D-s mesons are detected in the phi pi(+), (K) over bar*K-0(+), and (K) over bar(0)K(+) decay modes; two fully reconstructed events yield the value (3.9 (-1.9 -1.1) (+5.1 +1.8))% for the D-s branching fraction to phi pi. This is the first direct, model-independent measurement of this quantity.

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