K → 2π Decay and Nonet Scalar Mesons in the Three-flavor NJL Model(§5. Low Energy Hadron Phenomenology and Chiral Symmetry,Possible Existence of the σ-Meson and Its Implications to Hadron Physics)

スポンサーリンク

概要

• 論文の詳細を見る

• We discuss (i)K → 2π decays using the U_L(3)×U_R(3) version of the Nambu-Jona-Lasinio model with the effective ΔS = 1 nonleptonic weak interaction and (ii)the effects of the U_A(1) breaking 6-quark interaction on the nonet scalar mesons in the context of the Nambu-Jona-Lasinio model. The ΔI = 3/2 amplitude of the K → 2π decay is in reasonable agreement with the experimental date. On the other hand, the calculated ΔI = 1/2 amplitudes of the K → 2π decay strongly depend on the mass of the low-lying scalar-isoscalar σ meson, and the observed values are reproduced with m_σ 〜 570 [MeV]. The low-lying scalar-isoscalar σ meson plays a central role in the enhancement of the ΔI = 1/2 amplitudes of the K → 2π decay. As for the effects of U_A(1) breaking 6-quark interaction on the nonet scalar mesons, it may explain the spectrum of the nonet scalar mesons obtained by the recent analyses of the experimental data.

• 素粒子論グループ 素粒子研究編集部の論文
• 2001-02-20

著者

• Takizawa M

  Showa Pharmaceutical Univ. Machida Jpn

• TAKIZAWA Makoto

  Showa Pharmaceutical University

• Takazawa Makoto

  Showa Pharmaceutical University

関連論文

• Heavy Mesons and Hadron Scattering : Structure of the Exotic Hadron X(3872)(Exotic Hadrons,New Frontiers in QCD 2010-Exotic Hadron Systems and Dense Matter-)
• U_A(1) Breaking Effects on the Light Scalar Meson Spectrum
• K → 2π Decay and Nonet Scalar Mesons in the Three-flavor NJL Model(§5. Low Energy Hadron Phenomenology and Chiral Symmetry,Possible Existence of the σ-Meson and Its Implications to Hadron Physics)
• U_A (1) Breaking Effects on the Light Scalar Meson Spectrum

スポンサーリンク