Impact of Duality Violations on Spectral Sum Rule Analyses
Abstract
Description
Recent sum rule analyses on the <VV-AA> two-point correlator have led to significant discrepancies in the values found for the OPE condensates, most dramatically in the dimension eight condensate and to a lesser extent in the dimension six one. Precise knowledge of these condensates is of relevance in kaon decays and therefore it seems mandatory to assess the actual impact of what is commonly neglected in spectral sum rules, most prominently the issue of duality violations. We will explicitly compute them in a toy model and show that they are a priori non-negligible.
4 pages. Talk delivered at the QCD 05 International Conference in Quantum Chromodynamics. Version to appear in the Proceedings
4 pages. Talk delivered at the QCD 05 International Conference in Quantum Chromodynamics. Version to appear in the Proceedings