Measurement of the Michel parameters ( η‾ , ξκ ) in the radiative leptonic decay of τ

Citation data:

Nuclear and Particle Physics Proceedings, ISSN: 2405-6014, Vol: 287, Page: 11-14

Publication Year:
2017
Usage 6
Downloads 5
Abstract Views 1
Captures 0
Readers 0
Citations 1
Citation Indexes 1
Repository URL:
https://digitalcommons.kennesaw.edu/facpubs/4215
DOI:
10.1016/j.nuclphysbps.2017.03.034
Author(s):
et al., N. Shimizu; Joffe, David; Kulasiri, Ratnappuli L.
Publisher(s):
Elsevier BV
Tags:
Physics and Astronomy; tau; michel parameter; leptonic decay; belle; Physics
article description
We present the first measurement of the Michel parameters η‾ and ξκ in the radiative leptonic decay of the τ lepton using 703 fb -1 of data collected with the Belle detector at the KEKB e+e− collider. The Michel parameters are measured by an unbinned maximum likelihood fit to the kinematic information of e+e−→τ+τ−→(π+π0ν‾)(l−νν‾γ)(l=e or μ). The preliminary values of the measured Michel parameters are η‾=−2.0±1.5±0.8 and ξκ=0.6±0.4±0.2, where the first error is statistical and the second is systematic.