Аңдатпа
The branching fractions of [Formula: see text] and [Formula: see text] are calculated within the chiral NJL model. Features of the axial-vector [Formula: see text] meson which play an important role in describing the [Formula: see text] decays are discussed. Permissible values for the mass and width of the [Formula: see text] meson are considered in accordance with the latest experiments.