The decay τ−→K−K+π−ντ and the ντ mass

Abstract

In this paper, we present a model based on the effective chiral Lagrangian to describe the decay ${\tau }^{-}\to K^{-}{K}^{+}{\pi }^{-}{\nu }_{\tau }$. Using our model we study the possible limits on the ${\nu }_{\tau }$ mass that can be achieved by a high-statistics, high-precision experiment taking data close to the $\tau$-pair production threshold.