Evidence for the leptonic decay D→μνμ

被引：24

作者：

Bai, JZ ^{[1
]}

Bardon, O

Blum, I

Breakstone, A

Burnett, T

Chen, GP

Chen, HF

Chen, J

Chen, SJ

Chen, SM

Chen, Y

Chen, YB

Chen, YQ

Cheng, BS

Cowan, RF

Cui, XZ

Ding, HL

Du, ZZ

Dunwoodie, W

Fan, XL

Fang, J

Fero, M

Gao, CS

Gao, ML

Gao, SQ

Gratton, P

Gu, JH

Gu, SD

Gu, WX

Gu, YF

Guo, YN

Han, SW

Han, Y

Harris, FA

Hatanaka, M

He, J

He, M

Hitlin, DG

Hu, GY

Hu, T

Hu, XQ

Huang, DQ

Huang, YZ

Izen, JM

Jia, QP

Jiang, CH

Jin, S

Jin, Y

Jones, L

Kang, SH

机构：

[1] Inst High Energy Phys, Beijing 100039, Peoples R China

[2] Boston Univ, Boston, MA 02215 USA

[3] CALTECH, Pasadena, CA 91125 USA

[4] Univ Sci & Technol China, Hefei 230026, Peoples R China

[5] Colorado State Univ, Ft Collins, CO 80523 USA

[6] MIT, Cambridge, MA 02139 USA

[7] Shandong Univ, Jinan 250100, Peoples R China

[8] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

[9] Univ Hawaii, Honolulu, HI 96822 USA

[10] Univ Calif Irvine, Irvine, CA 92717 USA

[11] Univ Texas, Richardson, TX 75083 USA

[12] Univ Washington, Seattle, WA 98195 USA

来源：

PHYSICS LETTERS B | 1998年 / 429卷 / 1-2期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

D O I：

10.1016/S0370-2693(98)00313-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Purely leptonic decays of the charged D meson have been studied using the reaction e(+)e(-) --> D*D-+(-) at a center of mass energy of 4.03 GeV. A search was performed for D --> mu v(mu), recoiling against a D-0 or D+ which had been reconstructed from its hadronic decay products. A single event candidate was found in the reaction e(+)e(-) --> D*D-+(-), where D*(+) --> pi(+)D(0) with the D-0 --> K- pi(+), and the recoiling D- decaying via D- --> mu(-)(v) over bar(mu). This yields a branching fraction value (D --> mu v mu) = 0.08(- 0.05 - 0.02)(+ 0.16 + 0.05)% and a corresponding value of the pseudoscalar decay constant f(D) = 300(- 150 - 40)(+ 180 + 80) MeV. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：188 / 194

页数：7

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