Relationship between the quark condensate and low-energy Pi-Pi observables beyond O(p^4)

Details Relationship between the quark condensate and low-energy Pi-Pi observables beyond O(p^4) Relationship between the quark condensate and low-energy Pi-Pi observables beyond O(p^4)

2000-07-29

arxiv.org/abs/hep-ph/0007348v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

The two-flavor Gell-Mann-Oakes-Renner ratio is expressed in terms of
low-energy pi-pi observables including the O(p^6) 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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