Two-body decays of radially excited $\eta(1295)$ and $\eta(1475)$ mesons in the extended NJL model

TL;DR

This paper models the two-body decay processes of radially excited eta mesons using the extended NJL model, highlighting dominant decay channels and their contributions to meson widths.

Contribution

It provides a detailed theoretical analysis of decay channels of excited eta mesons within the extended NJL framework, identifying key decay modes.

Findings

Decay $ ext{eta}(1475) o K_0^* K, a_0 ext{pi}$ dominate the width.

Decay $ ext{eta}(1475) o K^* K$ has a smaller contribution.

Two-particle decays negligibly affect $ ext{eta}(1295)$ width.

Abstract

In the extended NJL model, two-body strong decays of the radially excited $\eta(1295)$ and $\eta(1475)$ mesons are described. It is shown that the two-body decays $\eta(1475)\to K_0^*K, a_0\pi$ play a dominant role in determining the width of the radially excited meson $\eta(1475)$. At the same time, the decays $\eta(1475)\to K^*K$ make a significantly smaller contribution to the total width. It is shown that two-particle decays give only a negligible contribution to the total width of the $\eta(1295)$.