The decay $\tau \to K^{*0}(892) K^- \nu_{\tau}$ in the extended NJL model

TL;DR

This paper calculates the decay width of tau to K*0(892) K- nu_tau using the extended NJL model, considering various meson contributions, and provides predictions aligned with experimental data.

Contribution

It introduces a detailed calculation of tau decay within the extended NJL model, including multiple meson states and diagrams, offering new theoretical insights.

Findings

Decay width results agree with experimental data

Axial-vector and vector channels dominate the decay process

Differential distribution predictions are provided

Abstract

In the extended Nambu -- Jona-Lasinio model, the decay width of $\tau \to K^{*0}(892) K^- \nu_{\tau}$ is calculated. The contributions from the contact diagram and diagrams with intermediate axial-vector, vector and pseudoscalar mesons in the ground and first radially excited states are taken into account. It is shown that axial-vector and vector channel with a contact diagram give a dominant contribution to the decay width. The obtained results for the decay width $\tau \to K^{*0}(892) K^- \nu_{\tau}$ are in satisfactory agreement with experimental data. A prediction for differential distribution over the invariant mass of the meson pair $K^{*0}(892) K^-$ is given.