https://scholars.lib.ntu.edu.tw/handle/123456789/574724
標題: | Measurement of the τ Michel parameters η and ξκ in the radiative leptonic decay τ- → l- ντνlγ | 作者: | Shimizu N. et al. Aihara, H. Epifanov, D. Adachi, I. Said, S.Al. Asner, D.M. Aulchenko, V. Aushev, T. Ayad, R. Babu, V. Badhrees, I. Bakich, A.M. Bansa, V. Barberio, E. Bhardwaj, V. Bhuyan, B. Biswal, J. Bobrov, A. Bozek, A. Bračko, M. Browder, T.E. Červenkov, D. Chang, M.-C. PAO-TI CHANG Chekelian, V. Chen, A. Cheon, B.G. Chilikin, K. Cho, K. Choi, S.-K. Choi, Y. Cinabro, D. Czank, T. Dash, N. Di Carlo, S. Doležal, Z. Dutta, D. Eidelman, S. Fast, J.E. Ferber, T. Fulsom, B.G. Garg, R. Gaur, V. Gabyshev, N. Garmash, A. Gelb, M. Goldenzweig, P. WEI-SHU HOU MIN-ZU WANG |
公開日期: | 2018 | 卷: | 2018 | 期: | 2 | 來源出版物: | Progress of Theoretical and Experimental Physics | 摘要: | We present a measurement of the Michel parameters of the τ lepton, η and ξκ, in the radiative leptonic decay τ- → l- ντνlγ using 711 fb-1 of collision data collected with the Belle detector at the KEKB e+e- collider. The Michel parameters are measured in an unbinned maximum likelihood fit to the kinematic distribution of e+e- → τ+τ- → (π+π0ντ)(l- ντνlγ)(l = e or μ The measured values of the Michel parameters are η = -1.3 ± 1.5 ± 0.8 and ξκ = 0.5 ± 0.4 ± 0.2, where the first error is statistical and the second is systematic. This is the first measurement of these parameters. These results are consistent with the Standard Model predictions within their uncertainties, and constrain the coupling constants of the generalized weak interaction. ? The Author(s) 2018. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062193441&doi=10.1093%2fptep%2fpty003&partnerID=40&md5=3346d8e611de5d8f326a82c3fd1d9393 https://scholars.lib.ntu.edu.tw/handle/123456789/574724 |
ISSN: | 20503911 | DOI: | 10.1093/ptep/pty003 |
顯示於: | 物理學系 |
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