pi^0-eta Mixing and CP Violation

Abstract

We discuss ${\pi }^0$ -$\eta$ mixing and its implication for ${\epsilon }^{\prime }/\epsilon$ to next-to-leading order in the low-energy expansion. The big effect due to $\eta$-${\eta }^{\prime }$ mixing is shown to be largely cancelled by other contributions occurring at the same order in the chiral expansion.

8 pages

References in corpus (4)

• The ratios of the light quark masses
• A new measurement of direct CP violation in two pion decays of the neutral kaon
• The Electromagnetic Interaction in Chiral Perturbation Theory
• The leading chiral electromagnetic correction to the nonleptonic Delta I = 3/2 amplitude in kaon decays

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• Delta I=1/2 and epsilon'/epsilon in Large-Nc QCD
• Final State Interactions in Kaon Decays
• $K\to 3\pi$ Decays in Chiral Perturbation Theory
• epsilon'/epsilon at the NLO: 10 Years Later
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• A New Prediction for Direct CP Violation ε'/εand ΔI = 1/2 Rule
• Isospin Breaking in $K\to 3\pi$ Decays I: Strong Isospin Breaking
• Isospin violation in pion-kaon scattering
• The Strange Quark Mass, alpha_s and the Chiral Limit Electroweak Penguin Matrix Elements From Hadronic Tau Decay Data
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• The Impact of |Delta I|=5/2 Transitions in K-> pi pi Decays
• The Strong Isospin-Breaking Correction for the Gluonic Penguin Contribution to epsilon'/epsilon at Next-to-Leading Order in the Chiral Expansion
• What is the (epsilon'/epsilon)_exp Telling Us ?
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• Chiral Limit Prediction for epsilon'/epsilon at NLO in 1/N_c
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• Dimuon CP Asymmetry in B Decays and Wjj Excess in Two Higgs Doublet Models
• Isospin-Breaking quark condensates in Chiral Perturbation Theory
• The role of final state interactions in epsilon'/epsilon
• Chiral Lagrangians
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• Theoretical status of epsilon'/epsilon
• epsilon'/epsilon and Rare K Decays in the Standard Model and Supersymmetry
• 1/N_c and epsilon'/epsilon
• Unfactorizing Polychromatic Penguins
• Vector Meson Contributions in epsilon'/epsilon
• Chiral loop corrections and isospin violation effects in epsilon'/epsilon