Pion and photon light-cone wave functions from the instanton vacuum - art.no. 114018.

The leading-twist wave functions of the pion and the photon at a tow normal ization point are calculated in the effective low-energy theory derived fro m the instant on vacuum. The pion wave function is found to be close to the asymptotic one, consistent with the recent CLEO measurements. The photon w ave function is nonzero at the end points. This different behavior is a con sequence of the momentum dependence of the dynamical quark mass suggested b y the instanton vacuum. We comment on the relation of meson wave functions and off-forward parton distributions in this model. [S0556-2821(99)09309-1] .