Relationship between the quark condensate and low-energy Pi-Pi observables beyond O(p⁴)

2000/07/29 by Luca Girlanda, Girlanda, Luca
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0007348

contribution to LNF Spring School, Frascati, 15-20 May, 2000

arxiv created 2000/07/29 · arxiv updated 2009/11/30

Abstract

The two-flavor Gell-Mann-Oakes-Renner ratio is expressed in terms of low-energy pi-pi observables including the O(p⁶) double chiral logarithms, computed in Generalized Chiral Perturbation Theory. It is found that their contribution is important and tends to compensate the one from the single chiral logarithms.

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