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

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 $\eta (1475)\to K_0^{\ast }K,a_0\pi$ play a dominant role in determining the width of the radially excited meson $\eta (1475)$. At the same time, the decays $\eta (1475)\to K^{\ast }K$ 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 $\eta (1295)$.

6 pages