Weak Semileptonic Decays of Vector Mesons in the NJL Model

Abstract

The decay widths of \(V \rightarrow K(\pi ) l \bar{\nu }_l \) are calculated within the Nambu–Jona-Lasinio model, where \(V=K^*, \rho , \omega , \phi \) and \(l=\mu , e\). The results are obtained using the previously fixed model parameters without introducing any arbitrary parameters. The obtained results are considered as predictions due to the absence of experimental data.