The decay widths of [Formula: see text], [Formula: see text] and [Formula: see text] are recalculated within the extended Nambu–Jona-Lasinio (NJL) quark model. It is shown that the mass of [Formula: see text] meson derived in the NJL model agrees with the one given in Particle Data Group tables but significantly deviates from the recent result of CMD-3 collaboration. Comparisons with earlier theoretical results are presented.
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Volkov et al. (2024) studied this question.
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