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arXiv · hep-ph/9501391

$K \to 2 π$ Decay in the Nambu-Jona-Lasinio Model

M. Takizawa·T. Inoue·M. Oka
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Abstract

We study the $K \to 2 π$ decays using the $U_L(3) \times U_R(3)$ version of the Nambu-Jona-Lasinio model with the effective $ΔS = 1$ nonleptonic weak interaction. The $ΔI = {3/2}$ amplitude is in reasonable agreement with experimental data. On the other hand, the calculated $ΔI = {1/2}$ amplitudes strongly depend on the mass of the low-lying scalar-isoscalar $σ$ meson, and therefore give a strong constraint on the parameters of the model.

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M. Takizawa, T. Inoue, M. Oka. 1995-01-27. $K \to 2 π$ Decay in the Nambu-Jona-Lasinio Model. https://doi.org/10.1143/ptps.120.335

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