Diffractive Vector Mesons in DIS: Meson Structure and QCD

Abstract

I review the modern status of QCD theory of diffractive vector meson production with the focus on shrinkage of photons with Q2 and (Q2+mV2)$scaling,j-planepropertiesoftheQCDpomeronandReggeshrinkageofdiffractioncone,$s$-channel helicity non-conservation and sensitivity to spin-orbital properties of vector mesons.

Comments: 9 p., 5 fig., Invited talk at Meson-2000, Krakow, May 2000