Weak semileptonic decays of vector mesons in the NJL model

The decay widths of $V\to K(\pi )l{\bar{\nu }}_l$ are calculated within the Nambu–Jona-Lasinio model, where $V=K^{\ast },\rho ,\omega ,\phi$ 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.