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Generalized parton distributions of the pion in a Bethe-Salpeter approach

  • S. NogueraEmail author
  • L. Theußl
  • V. Vento
Article

Abstract.

We calculate generalized parton distribution functions in a field theoretic formalism using a covariant Bethe-Salpeter approach for the determination of the bound-state wave function. We describe the procedure in an exact calculation in scalar Electrodynamics proving that the relevant corrections outside our scheme vanish. We extend the formalism to the Nambu-Jona-Lasinio model, a realistic theory of the pion. We go in both cases beyond all previous calculations and discover that all important features required by general physical considerations, like symmetry properties, sum rules and the polynomiality condition, are explicitly verified. We perform a numerical study of their behavior in the weak- and strong-coupling limits.

Keywords

Distribution Function Wave Function Symmetry Property Previous Calculation Exact Calculation 
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Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  1. 1.Departamento de Física Teórica and Instituto de Física CorpuscularUniversidad de Valencia, CSICBurjassot (Valencia)Spain

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