A New Estimate of ${\epsilon }^{\prime }/\epsilon$

Abstract

We discuss a new estimate of ${\epsilon }^{\prime }/\epsilon$ in the kaon system. The present approach is based on the evaluation of the hadronic matrix elements of the \mbox{$\Delta S=1$} effective quark lagrangian by means of the chiral quark model, with the inclusion of meson one-loop renormalization and NLO Wilson coefficients. The estimate here reviewed is fully consistent with the $\Delta I=1/2$ selection rule in $K\to \pi \pi$ decays, which is well reproduced within the same framework.

12 pages, uuencoded LATEX2e file including 4 eps figures. Talk given at the Workshop on K Physics, Orsay, France, May 30 - June 4, 1996

References in corpus (11)

• The $\Delta S=1$ Effective Hamiltonian Including Next-to-Leading Order QCD and QED Corrections
• The Anatomy of ${\epsilon }^{\prime }/\epsilon$ Beyond Leading Logarithms with Improved Hadronic Matrix Elements
• Enhancement of the $K_L$ -- $K_S$ Mass Difference by Short Distance QCD Corrections Beyond Leading Logarithms
• ${\epsilon }^{\prime }/\epsilon$ at the next-to-leading order in QCD and QED
• QCD tests from $e^+e^- \rar I=1~$ hadrons data and implication on the value of ${\alpha }_s$ from $\tau$-decays
• Light Quark Masses from QCD
• The Strange Quark Mass from QCD Sum Rules
• Studying ${\epsilon }^{\prime }/\epsilon$ in the Chiral Quark Model: ${\gamma }_5$-Scheme Independence and NLO Hadronic Matrix Elements
• The $\Delta S=1$ Weak Chiral Lagrangian as the Effective Theory of the Chiral Quark Model
• Phenomenology with Wilson fermions using smeared sources
• Updating the Unitarity Triangle: Top Quark Mass Versus Nonperturbative Uncertainties

Cited by in corpus (13)

• Patterns of Flavour Violation in Models with Vector-Like Quarks
• The Standard Model Prediction for epsilon'/epsilon
• ${\epsilon }^{\prime }/\epsilon$ at $O(p^4)$ in the Chiral Expansion
• Standard Model Confronting New Results for epsilon'/epsilon
• Direct CP violation in $K^0\to \pi \pi$: Standard Model Status
• Renormalization Group Invariant Matrix Elements of DS = 2 and DI = 3/2 Four-Fermion Operators without Quark Masses
• Kaon CP violation and neutron EDM in the minimal left-right symmetric model
• A Heavy-Light Chiral Quark Model
• The Physics of $K^0-{\bar{K}}^0$ Mixing: ${\hat{B}}_K$ and $\Delta M_{LS}$ in the Chiral Quark Model
• epsilon'/epsilon in the Standard Model
• The Isgur-Wise Function within a Modified Heavy-Light Chiral Quark Model
• Theoretical status of epsilon'/epsilon
• The Revival of Kaon Flavour Physics