IP-Sat: Impact-Parameter dependent Saturation model; revised

TL;DR

This paper presents a comprehensive analysis of small-x data using the Impact-Parameter dependent Saturation (IP-Sat) Model, successfully describing various DIS and diffractive processes with high precision.

Contribution

It introduces a refined IP-Sat model with impact-parameter dependence, providing a unified description of inclusive and exclusive small-x processes based on a global data fit.

Findings

Excellent agreement with data for structure functions at small x

Model accurately predicts exclusive vector meson production

Unified description of inclusive and diffractive processes achieved

Abstract

In this talk, we present a global analysis of available small-x data on inclusive DIS and exclusive diffractive processes, including the latest data from the combined HERA analysis on reduced cross sections within the Impact-Parameter dependent Saturation (IP-Sat) Model. The impact-parameter dependence of dipole amplitude is crucial in order to have a unified description of both inclusive and exclusive diffractive processes. With the parameters of model fixed via a fit to the high-precision reduced cross-section, we compare model predictions to data for the structure functions, the longitudinal structure function, the charm structure function, exclusive vector mesons production and Deeply Virtual Compton Scattering (DVCS). Excellent agreement is obtained for the processes considered at small x in a wide range of Q^2.