Quark mass effects in double parton distributions

TL;DR

This paper develops and analyzes schemes to incorporate quark mass effects into the perturbative calculation of double parton distributions, including leading and next-to-leading order corrections, to improve theoretical precision.

Contribution

It introduces new schemes for including quark mass effects in double parton distribution calculations and studies their numerical and theoretical implications at leading and next-to-leading order.

Findings

Quark mass effects significantly influence double parton distributions.

Next-to-leading order corrections with quark masses are characterized in detail.

Numerical studies demonstrate the impact of mass effects on splitting kernels.

Abstract

Double parton distributions can be computed from the perturbative splitting of one parton into two if the distance between the two observed partons is small. We develop schemes to take into account quark mass effects in this computation, and we study these schemes numerically at leading order in the strong coupling. Furthermore, we investigate in detail the structure of the next-to-leading order corrections to the splitting kernels that include quark mass effects.