title: Imaging dynamical chiral-symmetry breaking: pion wave function on the light front.
abstract: We project onto the light front the pion's Poincaré-covariant Bethe-Salpeter wave function obtained using two different approximations to the kernels of quantum chromodynamics' Dyson-Schwinger equations. At an hadronic scale, both computed results are concave and significantly broader than the asymptotic distribution amplitude, φ(π)(asy)(x)=6x(1-x); e.g., the integral of φ(π)(x)/φ(π)(asy)(x) is 1.8 using the simplest kernel and 1.5 with the more sophisticated kernel. Independent of the kernels, the emergent phenomenon of dynamical chiral-symmetry breaking is responsible for hardening the amplitude.
authors.affiliation: Institut für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich, Germany.
authors.forename: Lei
authors.initials: L
authors.lastname: Chang
authors.forename: I C
authors.initials: IC
authors.lastname: Cloët
authors.forename: J J
authors.initials: JJ
authors.lastname: Cobos-Martinez
authors.forename: C D
authors.initials: CD
authors.lastname: Roberts
authors.forename: S M
authors.initials: SM
authors.lastname: Schmidt
authors.forename: P C
authors.initials: PC
authors.lastname: Tandy