Recent Progress on Tau Lepton Physics

TL;DR

This paper reviews recent advances in tau lepton physics, focusing on hadronic decays, determination of fundamental constants, and electroweak tests, highlighting progress in experimental measurements and theoretical understanding.

Contribution

It provides an updated overview of key measurements and theoretical descriptions in tau lepton decays, emphasizing recent progress and remaining challenges.

Findings

Determination of alpha_s from tau hadronic width

Measurement of |V_{us}| via tau decays

Theoretical modeling of tau -> nu_tau K pi spectrum

Abstract

Some important aspects of hadronic tau decays are reviewed: the determination of alpha_s from the inclusive tau hadronic width, the measurement of |V_{us}| through the Cabibbo-suppressed decays of the tau, and the theoretical description of the tau -> nu_tau K pi spectrum. The present status of other relevant electroweak topics, such as charged-current universality tests or bounds on lepton-flavour violation, has been already summarized in a previous review.