Relativistic Quark Model Calculation of the l1, l2 Coefficients of the Chiral Lagrangian
classification
✦ hep-ph
keywords
chiralmodelcalculationquarkrelativisticapproximationbethe-salpeterbriefly
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We briefly report on a relativistic quark model scheme to calculate the O(P^4) pion-pion vertex in the planar approximation and in the chiral limit. The calculation is reduced to the solution of simple integral equations (Bethe-Salpeter like) by an effective use of chiral Ward Identities. Specific model computations are provided.
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