The decays τ → (K,K(1460))ντ and the value of the weak decay constants FK and FK′ in the extended NJL model

M. K. Volkov, K. Nurlan, A. A. Pivovarov

2019

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DOI 10.1142/s0217751x19501379

Data confidence 70 medium

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Abstract

In the extended Nambu–Jona-Lasinio (NJL) model, the decay widths of [Formula: see text], [Formula: see text] are calculated. The contributions from intermediate axial-vector mesons [Formula: see text], [Formula: see text] and the first radially excited state [Formula: see text] are taken into account. Estimates for the weak decay constants [Formula: see text] and [Formula: see text] are given. Predictions are made for the width of [Formula: see text] decay and [Formula: see text] constant.