Light-Front Quark Model Phenomenology Consistent with Chiral Symmetry

Abstract

We discuss the link between the chiral symmetry of QCD and the numerical results of the light-front quark model, analyzing both the twist-2 and twist-3 distribution amplitudes of a pion. In particular, we exhibit that the pion twist-3 distribution amplitude can flip the sign of curvature as the cutoff scale for the transverse momentum gets lower than a typical scale of around 1 GeV.

Comments: 4 pages, talk presented at FB21, Chicago, 18-22 May 2015