A new method for the measurement of the Michel parameters that describe the daughter muon polarization in the τ − → μ − ν ¯ $$ \overline{\nu} $$ μ ν τ decay
Abstract This paper provides a detailed description of the method for the first direct measurement of all Michel parameters in the τ − → μ − ν ¯ $$ \overline{\nu} $$ μ ν τ decay related to the polarization of the daughter muon. An application of the suggested method in the existing and future experi...
Main Authors: | , |
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Format: | Article |
Language: | English |
Published: |
SpringerOpen
2022-10-01
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Series: | Journal of High Energy Physics |
Subjects: | |
Online Access: | https://doi.org/10.1007/JHEP10(2022)035 |
Summary: | Abstract This paper provides a detailed description of the method for the first direct measurement of all Michel parameters in the τ − → μ − ν ¯ $$ \overline{\nu} $$ μ ν τ decay related to the polarization of the daughter muon. An application of the suggested method in the existing and future experiments at e + e − colliders is considered. We have performed a feasibility study for the future Super Charm-Tau Factory and Belle II experiments. For the first one, the sensitivity to the Michel parameters ξ′, ξ′′, η′′, α′/A, and β′/A is estimated. For the latter, only one Michel parameter, ξ′, for which the sensitivity is maximum, is considered. |
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ISSN: | 1029-8479 |