https://doi.org/10.1140/epja/i2008-10591-8
Regular Article - Theoretical Physics
Forward-like functions for dual parametrization of GPDs from the nonlocal chiral quark model
1
Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780, Bochum, Germany
2
St.Petersburg, St. Petersburg State University, 198504, Petrodvoretz, Russia
Received:
17
March
2008
Accepted:
8
May
2008
Published online:
6
June
2008
We derive the set of inversion relations allowing to establish the link between the dual parametrization of GPDs and a broad class of phenomenological models for GPDs. As an example we consider the results of the calculation of the pion GPD in the nonlocal chiral quark model (NlCQM) to recover the set of forward-like functions Q 2ν representing this GPD in the framework of dual parametrization. We also argue that the Abel tomography method overlooks possible δ -function-like contributions to the GPD quintessence function which make explicit contribution to the D form factor.
PACS: 12.38.Lg Other nonperturbative calculations – / 13.60.Fz Elastic and Compton scattering –
© Società Italiana di Fisica and Springer-Verlag, 2008
