Decays f 1 → a0π; πππ(η) and f 1 → KKπ in the chiral U(3) × U(3) quark NJL model
Volkov M.K. Pivovarov A.A. Nurlan K.
27 August 2025American Physical Society
Physical Review D
2025#112Issue 31 - 7 pp.
The branching fractions of the axial vector meson decays f1 → a0π; ππη, f1 → ρπ; πππ, and f1 → KKπ are calculated in the standard U(3) × U(3) quark Nambu–Jona-Lasinio model. The intermediate channels with the states a0(980)π and f0(500)η are taken into account in the decay f1 → ππη. In the case of the scalar mesons, the q̄q representation as a chiral symmetric partners of the pseudoscalar mesons is used. It is shown that the decays f1 → ρπ and f1 → 3π occur due to the mass difference of the u and d quarks. All the results are obtained without using any additional arbitrary parameters and are in satisfactory agreement with the known experimental data.
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Bogoliubov Laboratory of Theoretical Physics, JINR, Moscow region, Dubna, 141980, Russian Federation
The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan
Bogoliubov Laboratory of Theoretical Physics
The Institute of Nuclear Physics
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