Speaker
Seung-il Nam
(Pukyung National University)
Description
In this talk, we present the pseudoscalar (PS) meson quasi-distribution amplitude (QDA), which is supposed to be an asymptotic analog to the meson distribution amplitude (DA) in the limit of the large longitudinal PS-meson momentum, employing the nonlocal chiral-quark model (NLChQM) in the light-front (LF) formalism with a minimal Fock-state for the mesons at the low-energy scale parameter of the model ~ 1 GeV. Numerically, we confirm that the obtained TMDA reproduces the experimental data for the photon-pion transition form factor at the low-Q^2 qualitatively well. It also turns out that the higher moments are more sensitive to the change of p_3, whereas the lower ones depend less on it.
