The $$\tau\rightarrow\bar{K}^{0*}(892)\pi^-\nu_\tau$$ Decay Taking into Account the Splitting of an Intermediate Ground-State Axial-Vector Meson K1A into Two Physical States K1(1270) and K1(1400)

Abstract

The width of the \(\tau\rightarrow\bar{K}^{0*}(892)\pi^-\nu_\tau\) decay has been calculated within the extended Nambu-Jona-Lasinio model taking into account intermediate axial-vector, vector, and pseudoscalar mesons in the ground and first radially excited states. The splitting of the axial-vector intermediate state K1A into two physical mesons K1(1270) and K1(1400) caused by the mixing of axial-vector strange mesons from the 3P1 and 1P1 nonets has also been taken into account. The results are in satisfactory agreement with experimental data.