TY  - JOUR
AU  - Gomez Dumm, D.
AU  - Noguera, S.
AU  - Scoccola, N. N.
PY  - 2017
DA  - 2017//
TI  - eta-gamma and eta(')-gamma transition form factors in a nonlocal NJL model
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 054006
EP  - 19pp
VL  - 95
IS  - 5
PB  - Amer Physical Soc
AB  - We study the eta and eta(') distribution amplitudes (DAs) in the context of a nonlocal SU(3)(L) circle times SUd(3)(R) chiral quark model. The corresponding Lagrangian allows us to reproduce the phenomenological values of pseudoscalar meson masses and decay constants, as well as the momentum dependence of the quark propagator arising from lattice calculations. It is found that the obtained DAs have two symmetric maxima, which arise from new contributions generated by the nonlocal character of the interactions. These DAs are then applied to the calculation of the eta-gamma and eta(')-gamma transition form factors. Implications of our results regarding higher twist corrections and/or contributions to the transition form factors originated by gluon-gluon components in the eta and eta(') mesons are discussed.
SN  - 2470-0010
UR  - http://arxiv.org/abs/1611.08457
UR  - https://doi.org/10.1103/PhysRevD.95.054006
DO  - 10.1103/PhysRevD.95.054006
LA  - English
N1  - WOS:000396030600002
ID  - GomezDumm_etal2017
ER  -