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Decayτ→πωνin the extended NJL model

“…Let us note that NJL [16][17][18][19][20][21] model allows us to describe the number of tau lepton decays [10][11][12]. In this work the investigation of the τ decays is continued and the decay τ → πων is calculated in the framework of the extended NJL model which takes into account intermediate ρ(770) and ρ(1450) mesons.…”

“…On the other hand the similar processes e − e + → π 0 γ, π 0 ρ 0 , π 0 ω, π + π − in the extended Nambu-Jona-Lasinio (NJL) model [13][14][15][16] were described [6][7][8][9].…”

Radiative decays of scalar mesons σ(600), f 0(980) and a 0(980) in the local Nambu-Jona-Lasinio model

“…Taking into account the six-quark interaction of t'Hooft leads to the mixing of σ and σ states [7][8][9][10]. Scalar isoscalar mesons 0 , σ are the mixed states…”

“…with the mixing angle α = 11 3 [8,9]. The coupling constants from the Lagrangian (2) are defined in the following manner [2]:…”

“…In a recent paper [1], the radiative decay φ → 0 γ width in the local Nambu-Jona-Lasinio (NJL) model [2][3][4][5][6][7][8][9][10] was calculated. In this work, just as in [1], we take into account not only the quark loop contributions (Hartree-Fock approximation) but also the meson loop contributions (next 1/N -approximation where N is the number of colors).…”