CGC/saturation approach for soft interactions at high energy: survival probability of the central exclusive production

TL;DR

This paper estimates the survival probability for central exclusive production at high energies using a CGC/saturation model that unifies soft and hard processes, finding a small probability at LHC energies due to impact parameter effects.

Contribution

It introduces a unified CGC/saturation framework to describe both soft and hard interactions and estimates the survival probability for exclusive processes at LHC energies.

Findings

Small survival probability at LHC energies due to impact parameter dependence.

Model successfully describes various soft scattering data.

Unified approach bridges soft and hard QCD processes.

Abstract

We estimate the value of the survival probability for central exclusive production, in a model, which is based on the CGC/saturation approach. Hard and soft processes are described in the same framework. At LHC energies, we obtain a small value for the survival probability. The source of the small value, is the impact parameter dependence of the hard amplitude. Our model has successfully described a large body of soft data: elastic, inelastic and diffractive cross sections,inclusive production and rapidity correlations, as well as the $t$-dependence of deep inelastic diffractive production of vector mesons