%0 Journal Article
%A Llanes Estrada, Felipe José
%A Bicudo, PD
%T Quark Schwinger-Dyson evaluation of the l(1),l(2) coefficients in the chiral Lagrangian
%D 2003
%@ 0556-2821
%U https://hdl.handle.net/20.500.14352/58813
%X Using a systematic expansion of the quark-antiquark Bethe Salpeter wave functions in the relativistic quark model and working to O(P-4) in the chiral limit, we are able to derive theoretical expressions relating the coefficients of the chiral Lagrangian l(1),l(2) to the underlying quark-antiquark wave functions and interaction kernels. This is accomplished by using a novel technique based on a Ward identity for the quark-antiquark ladder kernel which greatly simplifies the required effort. Numerical evaluations are performed in two simple specific models.
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