The two-flavor GellMann-Oakes-Renner ratio is expressed in terms of low-energy 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.
Relationship between the quark condensate and low-energy pi pi observables beyond O(p4)
GIRLANDA, Luca
2000-01-01
Abstract
The two-flavor GellMann-Oakes-Renner ratio is expressed in terms of low-energy 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.File in questo prodotto:
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