A Critical Reassessment of Q7 and Q8 Matrix Elements

Abstract

We compare recent theoretical determinations of weak matrix elements of the electroweak penguin operators Q7 and Q8. We pay special attention to the renormalization scheme dependence of these determinations as well as to the influence of higher dimension operators in the different approaches.

11 pages, latex; minor changes

References in corpus (1)

• Large-Nc QCD meets Regge theory: the example of spin-one two-point functions

Cited by in corpus (37)

• Kaon Decays in the Standard Model
• Anatomy of Prominent B and K Decays and Signatures of CP-Violating New Physics in the Electroweak Penguin Sector
• Electroweak Hadronic Contributions to the muon g-2
• Flavor Physics in the Randall-Sundrum Model: II. Tree-Level Weak-Interaction Processes
• Duality violations and spectral sum rules
• The Standard Model Prediction for epsilon'/epsilon
• A Rational Approach to Resonance Saturation in large-Nc QCD
• V-A hadronic tau decays : a laboratory for the QCD vacuum
• Direct CP violation in $K^0\to \pi \pi$: Standard Model Status
• Testing an approximation to large-Nc QCD with a toy model
• Delta I=1/2 and epsilon'/epsilon in Large-Nc QCD
• Improved Determination of the Electroweak Penguin Contribution to epsilon'/epsilon in the Chiral Limit
• QCD Condensates for the Light Quark V-A Correlator
• K^0-\bar K^0 mixing beyond the standard model and CP-violating electroweak penguins in quenched QCD with exact chiral symmetry
• Neural network parametrization of spectral functions from hadronic tau decays and determination of QCD vacuum condensates
• epsilon'/epsilon at the NLO: 10 Years Later
• Chiral Condensates, Q_7 and Q_8 Matrix Elements and Large-N_c QCD
• On the Delta I = 1/2 Rule in Holographic QCD
• Novel patterns for vector mesons from the large-Nc limit
• Isospin-Violating Contributions to ${\epsilon }^{\prime }/\epsilon$
• Long-distance dimension-eight operators in B_K
• An example of resonance saturation at one loop
• Correlations between epsilon'/epsilon and Rare K Decays in the Littlest Higgs Model with T-Parity
• Remarks on the hadronic matrix elements relevant to the SUSY K-Kbar mixing amplitude
• Charged Kaon K \to 3 pi CP Violating Asymmetries at NLO in CHPT
• Analytic Approaches to Kaon Physics
• The Strange Quark Mass, alpha_s and the Chiral Limit Electroweak Penguin Matrix Elements From Hadronic Tau Decay Data
• SU(3) analysis of four-quark operators: $K\to \pi \pi$ and vacuum matrix elements
• A joint analysis of the S-wave in the pi+pi- and pi0pi0 data
• Comment on `Analysis of O(p^2) Corrections to <2pi|Q_{7,8}|K>'
• Kaon mixing and the charm mass
• Hadronic Matrix Elements for Kaons
• Matching the Electroweak Penquins Q_7 and Q_8
• Matrix Elements of Light Quarks
• Unfactorizing Polychromatic Penguins
• Chiral loop corrections and isospin violation effects in epsilon'/epsilon
• K -> pi pi Electroweak Penguins in the Chiral Limit