Photon Radiation Induced by Multiple Parton Rescattering in Deeply Inelastic Scattering

Photon radiation induced by multiple parton rescattering and corresponding parton energy loss in eA deeply inelastic scattering are investigated by using the generalized factorization of higher twist parton distributions beyond the helicity amplitude approximation.It turns out that the behaviour fo the nuclear size dependence of the parton energy loss is different in the photon and gluon radiation cases.The parton energy loss due to photon radiation depends linearly,instead of quadratically,on nuclear size due to gluon radiation.