Photon wave function in nonforward diffractive scattering with nonvanishing quark masses - art. no. 074028

The light-cone photon wave function in explicit helicity states, Valid for massive quarks and in both momentum and configuration space, is presented b y considering leading ol der photon-proton hard scattering; i.e., the split ting quark pair scatters with the proton in the Regge limit. Further we app ly it to the diffractive scattering at a nonzero momentum transfer and reac h a similar factorization as in the case of zero momentum transfer.