Diffractive DIS from the generalized BFKL pomeron. Predictions for HERA

TL;DR

This paper provides a microscopic QCD calculation of diffractive DIS cross sections and the pomeron's structure, revealing strong factorization breaking and weak Q^2 dependence, with implications for HERA experiments.

Contribution

It introduces a dipole approach to the generalized BFKL pomeron, showing the pomeron's non-particle-like nature and proposing a two-component structure function model.

Findings

Strong factorization breaking in diffractive DIS

Weak Q^2 dependence of the diffractive structure function

Pomeron described as a two-component structure with different fluxes

Abstract

We present microscopic QCD calculation of the cross section of diffractive DIS and of the partonic structure of the pomeron from the dipole approach to the generalized BFKL pomeron. We show that the pomeron can not be treated as a particle with uniquely defined structure function and flux in the proton. We find strong factorization breaking which can approximately be described by the two-component structure function of the pomeron, each component endowed with the different flux of pomerons in the proton. We predict very weak $Q^{2}$ dependence of the diffractive contribution to the proton structure function.