1202.0506 (M. K. Volkov et al.)

$τ^{-} \to π^{-} π^{0} ν_τ$ decay in the extended NJL model    [PDF]

M. K. Volkov, D. G. Kostunin

The width of the decay $\tau^{-} \to \pi^{-} \pi^{0} \nu_\tau$ was calculated
in the extended NJL model. Contact interaction of $W$ boson with pion pair as
well as the contribution of the $\rho$ mesons in ground and first radial-exited
states are taken into account. The sum of the contact diagram and diagram with
intermediate $\rho$ meson in the ground state leads to the result which
coincides with the result of the vector-dominance model. Our results are in
satisfactory agreement with experimental data.

View original: http://arxiv.org/abs/1202.0506