Precision measurements of B(D+ -g mu(+)nu(mu)), the pseudoscalar decay constant fD+, and the quark mixing matrix element vertical bar V-cd vertical bar

M Ablikim,M N Achasov,X C Ai,O Albayrak,D Ambrose, F F An, Q An, J Z Bai,R Baldini Ferroli, Y Ban,J V Bennett,M Bertani,J M Bian,E Boger, O Bondarenko, I Boyko,Slawomir Braun, R A Briere,Hui Cai,X Cai,O Cakir,A Calcaterra,G F Cao, S A Cetin,J F Chang, G A Chelkov, Guangchun Chen,H S Chen,J C Chen,M L Chen,S J Chen,X R Chen, Y B Chen,H P Cheng,X K Chu,Y P Chu,D Croninhennessy,H L Dai,J P Dai,D V Dedovich, Z Y Deng,A G Denig,I Denysenko,M Destefanis,W M Ding, Y Ding,Changqing Dong,Jie Dong, L Y Dong,M Y Dong,S X Du,J Z Fan,Jingyuan Fang,S S Fang,Yuzhen Fang, L Fava,C Q Feng, C D Fu,J L Fu,O Fuks,Qingyu Gao,Y Gao, C Geng,K Goetzen,W X Gong,W Gradl,M Greco,M H Gu,Y T Gu,Y H Guan,A Q Guo,L B Guo, Tianxiang Guo,Y P Guo,Y L Han,F A Harris,K L He, M He,Z Y He,T Held,Y K Heng,Z L Hou,C Hu,H M Hu,J F Hu, T Hu,Garng M Huang,J S Huang,Lei Huang,X T Huang,Y Huang, T Hussain,C S Ji,Q P Ji,X B Ji,L L Jiang, X S Jiang,J B Jiao,Z Jiao,D P Jin,S Jin,Tord Johansson,N Kalantarnayestanaki,X S Kang,M Kavatsyuk, B Kloss, B Kopf,M Kornicer,W Kuehn,Andrezej Kupsc,W Lai, J S Lange,M Lara,P Larin,M Leyhe,C H Li,D M Li,Feng Li,Guisheng Li,H B Li,J C Li,Kan Li, Lei Li,P R Li,Q J Li, T Li,W G Li, X L Li, Z B Li,Hong Liang,Y T Liang,D X Lin, B J Liu, C L Liu,F H Liu,H H Liu, J P Liu, K Y Liu, P L Liu,Q Liu, S B Liu,Xiaogang Liu, Y B Liu,Z A Liu, H Loehner,X C Lou,G R Lu,H L Lu,J G Lu,X R Lu,Y P Lu, C L Luo, M X Luo,Tao Luo, X L Luo,M Lv,F C Ma,H L Ma,Q M Ma,S Ma,T Ma,X Y Ma, F E Maas,M Maggiora,Q A Malik,Y J Mao,Z P Mao,J G Messchendorp,J Min,T J Min,R E Mitchell,X H Mo,Y J Mo,H Moeini,C Morales Morales,K Moriya,N Yu Muchnoi,H Muramatsu,Y Nefedov,I B Nikolaev, Z Ning,S Nisar,X Y Niu,S L Olsen,Q Ouyang,S Pacetti,M Pelizaeus,H P Peng,K Peters, J L Ping,R G Ping, R Poling,E Prencipe, M Qi, S Qian,C F Qiao,L Q Qin,X S Qin,Yang Qin,Z H Qin,J F Qiu,K H Rashid, C F Redmer, M Ripka,G Rong,X D Ruan,A V Sarantsev,Karin Schonning,S Schumann, W Shan,Ming Shao, C P Shen, X Y Shen,H Y Sheng,M R Shepherd,W M Song,X Y Song,S Spataro, B Spruck,G X Sun,J F Sun,S S Sun,Yun Jie Sun,Z J Sun,C J Tang,X Tang,I Tapan, E H Thorndike,D Toth,M Ullrich, I Uman, G Varner, Baoping Wang,D Y Wang,Kefeng Wang,L S Wang,Ming Wang,P L Wang,Q J Wang,S G Wang,Wei Wang,X F Wang,Y Q Wang,Z G Wang,D H Wei, J B Wei,P Weidenkaff,S P Wen,M Werner,U Wiedner,M Wolke,L H Wu,N Wu,Weiguo Wu,Zhiqin Wu,L G Xia,Yunsheng Xia,Dongrong Xiao,Z J Xiao,Y G Xie,Q L Xiu,G F Xu,Lixin Xu, Q J Xu,X P Xu,Zhigang Xue,Li Yan,W B Yan, Y H Yan,H X Yang,Y X Yang,H Ye,M H Ye,B X Yu,C X Yu,H W Yu,J S Yu,S P Yu, C Z Yuan,W L Yuan,Yaofeng Yuan,A A Zafar, A Zallo,S L Zang,Y Zeng, B X Zhang, Cun Bao Zhang, D H Zhang, H Y Zhang, J Z Zhang, S H Zhang, X Y Zhang, Y H Zhang, Z Y Zhang,G Zhao,J W Zhao,Lei Zhao,M G Zhao,Q W Zhao,S J Zhao,T C Zhao,X H Zhao,Y B Zhao,Z G Zhao, A Zhemchugov,Bingsong Zheng,J P Zheng, Y H Zheng,B Zhong, Li Zhou,Xun Yu Zhou, K J Zhu, X L Zhu,Y S Zhu,Z A Zhu, J Zhuang, B S Zou,J H Zou

PHYSICAL REVIEW D（2014）

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摘要

We report a measurement of the branching fraction B(D+ -> mu(+)nu(mu)) = [3.71 +/- 0.19(stat) +/- 0.06(sys)] x 10(-4) based on 2.92 fb(-1) of data accumulated at root s = 3.773 GeV with the BESIII detector at the BEPCII collider. This measurement, in conjunction with the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-cd vertical bar determined from a global Standard Model fit, implies a value for the weak decay constant f(D+) = (203.2 +/- 5.3 +/- 1.8) MeV. Additionally, using this branching fraction measurement together with a lattice QCD prediction for f(D+), we find vertical bar V-cd vertical bar 0.2210 +/- 0.0058 +/- 0.0047. In either case, these are the most precise results for these quantities to date.

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