6533b839fe1ef96bd12a65a7

RESEARCH PRODUCT

The pion distribution amplitude and the pion-photon transition form factor in a nonlocal chiral quark model

Santiago NogueraNorberto N. ScoccolaNorberto N. ScoccolaD. Gómez DummD. Gómez DummSergio Scopetta

subject

QuarkNuclear and High Energy PhysicsParticle physicsPhotonCiencias FísicasHigh Energy Physics::LatticeNuclear TheoryFOS: Physical sciencesFísica de Partículas y Campos01 natural sciences//purl.org/becyt/ford/1 [https]PionHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesExponential decay010306 general physicsQuantum chromodynamicsPhysics010308 nuclear & particles physicsQuark modelFísicaPropagator//purl.org/becyt/ford/1.3 [https]High Energy Physics - PhenomenologyAmplitudeRelativistic quark modelsHigh Energy Physics::ExperimentDistribution amplitudesQuantum chromodynamicsCIENCIAS NATURALES Y EXACTAS

description

We study the pion Distribution Amplitude (\pi DA) in the context of a nonlocal chiral quark model. The corresponding Lagrangian reproduces the phenomenological values of the pion mass and decay constant, as well as the momentum dependence of the quark propagator obtained in lattice calculations. It is found that the obtained \pi DA has two symmetric maxima, which arise from the new contributions generated by the nonlocal character of the interactions. This \pi DA is applied to leading order and next-to-leading order calculations of the pion-photon transition form factor. Implications of the results are discussed.

yearjournalcountryeditionlanguage
2014-03-01
10.1103/physrevd.89.054031http://arxiv.org/abs/1311.3595