Moscow International School of Physics 2022

A new method for the measurement of the Michel parameters that describe the daughter muon polarization in the τ−→μ−ν¯μντ decay

28 Jul 2022, 16:42

12m

House of International Conferences

Talk (10+2 min) Young Scientist Forum Young Scientist Forum

Speaker

Denis Bodrov (Higher School of Economics (HSE))

Description

This work provides a detailed description of the method for the first direct measurement of all Michel parameters in the ${\tau }^{-}\to {\mu }^{-}{\overline{\nu }}_{\mu }{\nu }_{\tau }$ 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 ${\xi }^{\prime }$, ${\xi }^{″}$, ${\eta }^{″}$, ${\alpha }^{\prime }/A$, and ${\beta }^{\prime }/A$ is estimated. For the latter, only one Michel parameter, ${\xi }^{\prime }$, for which the sensitivity is maximum, is considered.

Presentation materials

bodrov_MISP2022.pdf