Direct measurement of the branching fraction for D+→(K)over-bar0 μ+νμ and determination of Γ(D0→K-μ+ νμ)/Γ (D+→(K)over-bar0 μ+ νμ)

被引：9
|
作者：
Ablikim, M.
Bai, J. Z.
Ban, Y.
Cai, X.
Chen, H. F.
Chen, H. S.
Chen, H. X.
Chen, J. C.
Chen, Jin
Chen, Y. B.
Chu, Y. P.
Dai, Y. S.
Diao, L. Y.
Deng, Z. Y.
Dong, Q. F.
Du, S. X.
Fang, J.
Fang, S. S.
Fu, C. D.
Gao, C. S.
Gao, Y. N.
Gu, S. D.
Gu, Y. T.
Guo, Y. N.
He, K. L.
He, M.
Heng, Y. K.
Hou, J.
Hu, H. M.
Hu, J. H.
Hu, T.
Huang, X. T.
Ji, X. B.
Jiang, X. S.
Jiang, X. Y.
Jiao, J. B.
Jin, D. P.
Jin, S.
Lai, Y. F.
Li, G.
Li, H. B.
Li, J.
Li, R. Y.
Li, S. M.
Li, W. D.
Li, W. G.
Li, X. L.
Li, X. N.
Li, X. Q.
Liang, Y. F.
机构：
[1] Inst High Energy Phys, Beijing 100049, Peoples R China
[2] China Ctr Adv Sci & Technol, Beijing 100080, Peoples R China
[3] Guangxi Normal Univ, Guilin 541004, Peoples R China
[4] Guangxi Univ, Nanning 53004, Peoples R China
[5] Henan Normal Univ, Xinxiang 435002, Peoples R China
[6] Huazhong Normal Univ, Wuhan 430079, Peoples R China
[7] Hunan Univ, Changsha 410082, Peoples R China
[8] Jinan Univ, Jinan 250022, Peoples R China
[9] Liaoning Univ, Shenyang 110036, Peoples R China
[10] Nanjing Normal Univ, Nanjing 210097, Peoples R China
[11] Nankai Univ, Tianjin 300071, Peoples R China
[12] Peking Univ, Beijing 100871, Peoples R China
[13] Shandong Univ, Jinan 250100, Peoples R China
[14] Sichuan Univ, Chengdu 610064, Peoples R China
[15] Tsinghua Univ, Beijing 100084, Peoples R China
[16] Univ Sci & Technol China, Hefei 230026, Peoples R China
[17] Wuhan Univ, Wuhan 430072, Peoples R China
[18] Zhejiang Univ, Hangzhou 310028, Peoples R China
来源：
PHYSICS LETTERS B | 2007年 / 644卷 / 01期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1016/j.physletb.2006.11.026
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The absolute branching fraction for the decay D+ -> (K) over bar (0)mu+nu(mu) is determined using 5321 +/- 149 +/- 160 singly tagged D- sample from the data collected around root s = 3.773 GeV with the BESII detector at the BEPC collider. In the system recoiling against the singly tagged D- mesons, 28.7 +/- 6.4 events for D+ -> (K) over bar (0)mu+nu(mu) are observed. These yield the absolute branching fraction to be BF(D+ -> (K) over bar0(mu)+nu(mu)) (10.3 +/- 2.3 +/- 0.8)%. The ratio of the two partial widths for the decays D-0 -> K-mu+nu(mu) and D+ -> (K) over bar (-)mu+nu(mu) is determined to be Gamma(D-0 -> K-mu+nu(mu))/Gamma(D+ -> (K) over bar (0)mu+nu(mu)) = 0.87 +/- 0.24 +/- 0.15. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：20 / 24
页数：5
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