Precision measurement of the D*0 decay branching fractions

被引：7
|
作者：
Ablikim, M. [1 ]
Achasov, M. N. [8 ,58 ,59 ]
Ai, X. C. [1 ]
Albayrak, O. [4 ]
Albrecht, M. [3 ]
Ambrose, D. J. [47 ]
Amoroso, A. [51 ,53 ]
An, F. F. [1 ]
An, Q. [48 ]
Bai, J. Z. [1 ]
Ferroli, R. Baldini [19 ]
Ban, Y. [32 ]
Bennett, D. W. [18 ]
Bennett, J. V. [4 ]
Bertani, M. [19 ]
Bettoni, D. [21 ]
Bian, J. M. [46 ]
Bianchi, F. [51 ,53 ]
Boger, E. [24 ,66 ]
Bondarenko, O. [26 ]
Boyko, I. [24 ]
Briere, R. A. [4 ]
Cai, H. [55 ]
Cai, X. [1 ]
Cakir, O. [41 ,58 ,59 ]
Calcaterra, A. [19 ]
Cao, G. F. [1 ]
Cetin, S. A. [42 ]
Chang, J. F. [1 ]
Chelkov, G. [24 ,60 ,61 ]
Chen, G. [1 ]
Chen, H. S. [1 ]
Chen, H. Y. [2 ]
Chen, J. C. [1 ]
Chen, M. L. [1 ]
Chen, S. J. [30 ]
Chen, X. [1 ]
Chen, X. R. [27 ]
Chen, Y. B. [1 ]
Cheng, H. P. [16 ]
Chu, X. K. [32 ]
Cibinetto, G. [21 ]
Cronin-Hennessy, D. [46 ]
Dai, H. L. [1 ]
Dai, J. P. [35 ]
Dbeyssi, A. [13 ]
Dedovich, D. [24 ]
Deng, Z. Y. [1 ]
Denig, A. [23 ]
Denysenko, I. [24 ]
机构：
[1] Inst High Energy Phys, Beijing 100049, Peoples R China
[2] Beihang Univ, Beijing 100191, Peoples R China
[3] Ruhr Univ Bochum, D-44780 Bochum, Germany
[4] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[5] Cent China Normal Univ, Wuhan 430079, Peoples R China
[6] China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China
[7] COMSATS Inst Informat Technol, Lahore 54000, Pakistan
[8] G I Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia
[9] GSI Helmholtzcentre Heavy Ion Res GmbH, D-64291 Darmstadt, Germany
[10] Guangxi Normal Univ, Guilin 541004, Peoples R China
[11] Guangxi Univ, Nanning 530004, Peoples R China
[12] Hangzhou Normal Univ, Hangzhou 310036, Zhejiang, Peoples R China
[13] Helmholtz Inst Mainz, D-55099 Mainz, Germany
[14] Henan Normal Univ, Xinxiang 453007, Peoples R China
[15] Henan Univ Sci & Technol, Luoyang 471003, Peoples R China
[16] Huangshan Coll, Huangshan 245000, Peoples R China
[17] Hunan Univ, Changsha 410082, Peoples R China
[18] Indiana Univ, Bloomington, IN 47405 USA
[19] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[20] Univ Perugia, Ist Nazl Fis Nucl, I-06100 Perugia, Italy
[21] INFN Sezione Ferrara, I-44122 Ferrara, Italy
[22] Univ Ferrara, I-44122 Ferrara, Italy
[23] Johannes Gutenberg Univ Mainz, D-55099 Mainz, Germany
[24] Joint Inst Nucl Res, Dubna 141980, Russia
[25] Univ Giessen, D-52425 Giessen, Germany
[26] Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands
[27] Lanzhou Univ, Lanzhou 730000, Peoples R China
[28] Liaoning Univ, Shenyang 110036, Peoples R China
[29] Nanjing Normal Univ, Nanjing 210023, Peoples R China
[30] Nanjing Univ, Nanjing 210093, Peoples R China
[31] Nankai Univ, Tianjin 300071, Peoples R China
[32] Peking Univ, Beijing 100871, Peoples R China
[33] Seoul Natl Univ, Seoul 151747, South Korea
[34] Shandong Univ, Jinan 250100, Peoples R China
[35] Shanghai Jiao Tong Univ, Shanghai 200240, Peoples R China
[36] Shanxi Univ, Taiyuan 030006, Peoples R China
[37] Sichuan Univ, Chengdu 610064, Peoples R China
[38] Soochow Univ, Suzhou 215006, Peoples R China
[39] Sun Yat Sen Univ, Guangzhou 510275, Peoples R China
[40] Tsinghua Univ, Beijing 100084, Peoples R China
[41] Istanbul Aydin Univ, TR-34295 Istanbul, Turkey
[42] Dogus Univ, TR-34722 Istanbul, Turkey
[43] Uludag Univ, TR-16059 Bursa, Turkey
[44] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[45] Univ Hawaii, Honolulu, HI 96822 USA
[46] Univ Minnesota, Minneapolis, MN 55455 USA
[47] Univ Rochester, Rochester, NY 14627 USA
[48] Univ Sci & Technol China, Hefei 230026, Peoples R China
[49] Univ South China, Hengyan 421001, Peoples R China
[50] Univ Punjab, Lahore 54590, Pakistan
来源：
PHYSICAL REVIEW D | 2015年 / 91卷 / 03期
基金：
俄罗斯基础研究基金会; 美国国家科学基金会; 中国国家自然科学基金; 新加坡国家研究基金会;
关键词：
QCD;
D O I：
10.1103/PhysRevD.91.031101
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
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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页数：8
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