Updated determinations of |V$_{us}$| with tau decays using new recent estimates of radiative corrections for light-meson leptonic decay rates

TL;DR

This paper updates the measurement of the CKM matrix element |V$_{us}$| using tau decay data, incorporating recent radiative correction estimates, resulting in refined values with minor adjustments.

Contribution

It provides an updated determination of |V$_{us}$| from tau decays by including new radiative correction estimates, improving precision.

Findings

Minor changes in central values and uncertainties of |V$_{us}$|

Refined |V$_{us}$| determinations with recent corrections

Enhanced accuracy in tau decay-based CKM matrix element

Abstract

We update the |V$_{us}$| determinations using the HFLAV 2018 report tau branching fraction results with recent new estimates of the $\pi\ell2$ and $K\ell2$ radiative corrections. There are minor changes of the central values and uncertainties.