Double parton scattering via photon-proton interactions: a new light on the transverse proton structure

TL;DR

This paper investigates double parton scattering in photon-proton interactions, providing the first leading-order cross-section evaluation for four-jet photoproduction at HERA, revealing measurable DPS contributions and potential insights into proton structure.

Contribution

It presents the first calculation of the DPS cross-section in photon-proton interactions and introduces the $ ext{γ-p}$ effective cross section for the first time.

Findings

DPS contribution is significant and potentially measurable.

First evaluation of the $ ext{γ-p}$ effective cross section.

Future data could reveal new information on proton transverse structure.

Abstract

In this contribution we present the main results of the investigation about double parton scattering (DPS) in quasi-real photon-proton interactions. We show the first evaluation of the DPS cross-section at leading-order for the four-jet photo-production observed at HERA. To this aim the $\gamma-p$ effective cross section has been computed for the first time. One of the main outcomes of this analysis is that the DPS contribution is not negligible and potentially measurable. Furthermore, possible future data could be used to get new information on the transverse proton structure not accessible in other processes.