ε'/ε and Delta I=1/2 Rule in Nonlinear Sigma Model with Scalar Resonance(§5. Low Energy Hadron Phenomenology and Chiral Symmetry,Possible Existence of the σ-Meson and Its Implications to Hadron Physics)

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概要

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• We discuss the hadronic matrix elements of the QCD and electroweak penguin operators in kaon decay, K → ππ, using nonlinear sigma model with scalar resonances. The scalar mesons are introduced as a nonet representation of flavor SU(3) transformation. The propagators of these scalar resonances have effect of resumming a certain class of chiral corrections to the matrix elements to all order in chiral perturbation theory. Using this model impact on the physical observable in kaon decay, ΔI=1/2 rule and ε'/ε, are discussed. We show the effects of σ, meson axe of great importance in kaon decay when mass of the σ meson is near to the kaon mass due to propagator enhancement. However results show that we are still missing some large amount of contributions to explain both of ΔI=1/2 rule and ε'/ε consistently.

• 素粒子論グループ 素粒子研究編集部の論文
• 2001-02-20

著者

• Kiyo Yuichiro

  Department Of Physics Tohoku University

• KIYO Yuichiro

  Department of Physics, Tohoku University

関連論文

• Revisiting Wγ Production at RHIC
• ε'/ε and Delta I=1/2 Rule in Nonlinear Sigma Model with Scalar Resonance(§5. Low Energy Hadron Phenomenology and Chiral Symmetry,Possible Existence of the σ-Meson and Its Implications to Hadron Physics)
• Quark Mass Hierarchy, FCNC and CP Violation in a Seesaw Model

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