Perturbative Color Correlations in Double Parton Scattering

TL;DR

This paper investigates color correlations in Double Parton Scattering, revealing certain diagrams where these correlations are not suppressed and could be observable despite their small size relative to singlet correlations.

Contribution

It identifies a class of Feynman diagrams related to 1→2 processes where color correlations are not Sudakov suppressed, highlighting their potential observability.

Findings

Color correlations can be up to 5-10% of singlet correlations.

Certain diagrams are not suppressed by Sudakov factors.

Color correlations may be observable despite their small size.

Abstract

We study the contribution of color correlations to Double Parton Scattering (DPS). We show that there is a specific class of Feynman diagrams related to so called 1 \textrightarrow{} 2 processes when the contribution of these color correlations is not Sudakov suppressed with the transverse scales. The split scale increases with the transverse scale Q, with color correlations being up to 5-10 percent of singlet ones. The effective absence of Sudakov suppression gives hope that although they are small relative to color singlet correlations, they eventually can be observed.