Decays of $\tau \rightarrow \rho(770) (\rho'(1450)) \nu_\tau$ and $\tau \rightarrow K^{*}(892) (K^{*'}(1410)) \nu_\tau$ in the extended Nambu - Jona- Lasinio model

Abstract

In the extended Nambu - Jona - Lasinio model the decay widths $\tau \rightarrow \rho(770) (\rho'(1450)) \nu_\tau$ and $\tau \rightarrow K^{*}(892) (K^{*'}(1410)) \nu_\tau$ are studied in the quark one -loop approximation. Our estimations of the decay widths $\tau \rightarrow K^{*}(892) (K^{*'}(1410)) \nu_\tau$ are in satisfactory agreement with experimantal data. In the paper, the decay widths $\tau \rightarrow \rho(770) (\rho'(1450)) \nu_\tau$ are also calculated.