Diffractive dissociation in future electron-ion colliders

TL;DR

This paper investigates diffractive scattering in future electron-ion colliders by numerically solving QCD evolution equations, revealing how fixed and running couplings influence rapidity gap distributions and their implications for understanding diffraction at the partonic level.

Contribution

It provides the first detailed numerical analysis of diffractive dissociation in electron-ion colliders using QCD evolution equations with both fixed and running couplings.

Findings

Fixed coupling results match a recent diffractive dissociation model.

Different coupling schemes produce distinct rapidity gap shapes.

Highlights the importance of diffractive observables for partonic diffraction understanding.

Abstract

We study diffractive scattering cross sections, focusing on the rapidity gap distribution in realistic kinematics at future electron-ion colliders. Our study consists in numerical solutions of the QCD evolution equations in both fixed and running coupling frameworks. The fixed and the running coupling equations are shown to lead to different shapes for the rapidity gap distribution. The obtained distribution when the coupling is fixed exhibits a shape characteristic of a recently developed model for diffractive dissociation, which indicates the relevance of the study of that diffractive observable for the partonic-level understanding of diffraction.