Triumf, Vancouver, Canada
Generalized parton distributions of the pion in a Bethe-Salpeter approach
Generalized parton distribution functions (GPDs) are calculated in a field theoretic
formalism using a covariant Bethe-Salpeter approach for the determination of the bound-state
wave function. The procedure is first described in an exact calculation in scalar Electrodynamics,
and then extended to the Nambu-Jona-Lasinio model, a realistic theory of the pion. In both
cases we demonstrate that all important features required by general physical considerations,
like symmetry properties, sum rules and the polynomiality condition, are explicitly verified.
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