Measurement of Michel parameter in tau decay

Authors
Bai, JZ Bian, JG Chai, ZW Chen, GP Chen, HF Chen, JC Chen, YQ Chen, Y Chen, YB Cheng, BS Cui, XZ Ding, HL Dong, LY Du, ZZ Feng, S Gao, CS Gao, ML Gao, SQ Gu, JH Gu, SD Gu, WX Gu, YF Guo, YN Han, SW Han, Y He, JT He, J He, M Hu, GY Hu, HM Hu, JL Hu, QH Hu, T Hu, XQ Huang, JD Huang, YZ Jiang, CH Jin, Y Ke, ZJ Lai, YF Lang, PF Li, CG Li, D Li, HB Li, J Li, PQ Li, RB Li, W Li, WD Li, WG Li, XH Li, XN Liu, HM Liu, J Liu, JH Liu, RG Liu, Y Lu, F Lu, JG Lu, JY Lu, LC Luo, CH Ma, AM Ma, EC Ma, JM Mao, HS Mao, ZP Meng, XC Nie, J Qi, ND Qi, XR Qian, CD Qiu, JF Qu, YH Que, YK Rong, G Shao, YY Shen, BW Shen, DL Shen, H Shen, XY Sheng, HY Shi, HZ Song, XF Sun, F Sun, HS Tang, SQ Tong, GL Wang, F Wang, LS Wang, LZ Wang, M Wang, M Wang, PL Wang, P Wang, SM Wang, TJ Wang, YY Wei, CL Wu, YG Xi, DM Xia, XM Xie, PP Xie, Y Xie, YH Xiong, WJ Xu, CC Xu, GF Xu, MK Xu, YD Xue, ST Yan, J Yan, WG Yang, CY Yang, CM Yang, J Yang, XF Ye, MH Ye, QH Ye, SW Ye, YX Yi, K Yu, CS Yu, CX Yu, GW Yu, YH Yu, ZT Yu, ZQ Yuan, CZ Yuan, Y Zhang, BY Zhang, CC Zhang, DH Zhang, DH Zhang, HL Zhang, J Zhang, JW Zhang, JL Zhang, LS Zhang, QJ Zhang, SQ Zhang, XY Zhang, Y Zhang, YY Zhao, DX Zhao, HW Zhao, JW Zhao, M Zhao, WR Zheng, JP Zheng, LS Zheng, ZP Zhou, GP Zhou, HS Zhou, L Zhu, QM Zhu, HG Zhu, YC Zhu, YS Zhuang, B
Citation
Jz. Bai et al., Measurement of Michel parameter in tau decay, HIGH EN P N, 22(11), 1998, pp. 961-968
Citations number
8
Categorie Soggetti
Physics
Journal title
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
ISSN journal
02543052 → ACNP
Volume
22
Issue
11
Year of publication
1998
Pages
961 - 968
Database
ISI
SICI code
0254-3052(199811)22:11<961:MOMPIT>2.0.ZU;2-D
Abstract
We have analysed the e(+)e(-) collision data collected with Beijing Spectro meter at the center-of-mass energy 4.03 GeV and selected e(+)e(-) --> tau(/-)tau(-/+) e(+/-)X(-/+) nu's events, X+/- required as mu(+/-), pi(+/-) and rho(+/-). From fitting electron energy spectrum in tau --> e nu's decay, t he measurement value of Michel parameter is given as rho(tau --> e) 0.705(- 0.054-0.026)(+0.055+0.027), this result is in good agreement with the predi ction of standard Model.