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A rational approximation to <VV-AA> and its O(p^6) low-energy constant

arXiv:0801.3558 · doi:10.1016/j.physletb.2008.03.040

Abstract

Using a sequence of rational approximants and the large-Nc limit of QCD, we estimate the value of the low-energy constant C_87 which appears in the Lagrangian of Chiral Perturbation Theory at O(p^6).

10 pages, 1 figure. Comments and references added. Journal version