Precision measurement of the D*(0) decay branching fractions

M Ablikim,M N Achasov,X C Ai,O Albayrak,M Albrecht,D Ambrose,A Amoroso,F F An, Q An, J Z Bai,R Baldini Ferroli, Y Ban,D W Bennett,J V Bennett,M Bertani,D Bettoni,J M Bian,F Bianchi,E Boger, O Bondarenko, I Boyko,R A Briere,Hui Cai,X Cai,O Cakir,A Calcaterra,G F Cao, S A Cetin,J F Chang, G A Chelkov,Guisheng Chen,H Y Chen,J C Chen,M L Chen,S J Chen,X R Chen,Y B Chen,H P Cheng, X K Chu,G Cibinetto, D Croninhennessy,H L Dai,J P Dai, A Dbeyssi,D V Dedovich,Z Y Deng,A G Denig, I Denysenko,M Destefanis,F De Mori, Y Ding,Changzhi Dong,Jinxiang Dong,L Y Dong,M Y Dong,S X Du, P F Duan,J Z Fan, J Fang,S S Fang,X Fang,Y Fang, L Fava, F Feldbauer,G Felici, C Q Feng,E Fioravanti,M Fritsch, C D Fu,Qi Gao,Yanyan Gao, I Garzia,K Goetzen, W X Gong,W Gradl,M Greco, M H Gu,Y T Gu,Y H Guan, A Q Guo,L B Guo,Tao Guo,Y P Guo, Z Haddadi,A Hafner,Shijie Han,Y L Han,F A Harris,K L He,Z Y He,T Held,Y K Heng,Z L Hou,C Hu,H M Hu,J F Hu, T Hu

PHYSICAL REVIEW D（2015）

引用 11|浏览31

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摘要

Using 482 pb(-1) of data taken at root s = 4.009 GeV, we measure the branching fractions of the decays of D*(0) into D-0 pi(0) and D-0 gamma to be B(D*(0) -> D-0 pi(0)) = (65.5 +/- 0.8 +/- 0.5)% and B(D*(0) -> D0 gamma) = (34.5 +/- 0.8 +/- 0.5)%, respectively, by assuming that the D*(0) decays only into these two modes. The ratio of the two branching fractions is B(D*(0) -> D-0 pi(0))/B(D*(0) -> D-0 gamma) = 1.90 +/- 0.07 +/- 0.05, which is independent of the assumption made above. The first uncertainties are statistical and the second ones systematic. The precision is improved by a factor of 3 compared to the present world average values.

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mesons,natural sciences,qcd

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