A unitarized model of inclusive and diffractive DIS with Q2-evolution

TL;DR

This paper extends a unitarized QCD model to large Q2, accurately describing inclusive and diffractive deep inelastic scattering, and aligns well with experimental data across a broad kinematic range.

Contribution

It introduces a method to incorporate Q2 evolution into a unitarized model for inclusive and diffractive DIS, ensuring consistency with unitarity and experimental observations.

Findings

Good agreement with experimental data on F2 and diffractive cross sections.

Provides predictions for F2 and FL across wide kinematic ranges.

Proposes a procedure for initial conditions respecting unitarity in QCD evolution.

Abstract

We discuss the interplay of low-x physics and QCD scaling violations by extending the unified approach describing inclusive structure functions and diffractive production in $\gamma* p$ interactions proposed in previous papers, to large values of Q2. We describe the procedure of extracting, from the non-perturbative model, initial conditions for the QCD evolution that respect unitarity. Assuming Regge factorization of the diffractive structure function, a similar procedure is proposed for the calculation of hard diffraction. The results are in good agreement with experimental data on the proton structure function $F_2$ and the most recent data on the reduced diffractive cross section, $x_P \sigma_r^{\D(3)}$. Predictions for both $F_2$ and $F_L$ are presented in a wide kinematical range and compared to calculations within high-energy QCD.