Diagonal input for the evolution of off-diagonal partons

TL;DR

This paper demonstrates that knowing diagonal partons at a low energy scale allows accurate prediction of off-diagonal (skewed) distributions at higher scales, simplifying their determination.

Contribution

It introduces a method to derive off-diagonal parton distributions from diagonal ones at low scales, reducing the need for direct measurements.

Findings

Off-diagonal distributions can be accurately evolved from diagonal inputs.

The method simplifies the determination of skewed parton distributions.

Results show good agreement across various input scenarios.

Abstract

We show that a knowledge of diagonal partons at a low scale is sufficient to determine the off-diagonal (or skewed) distributions at a higher scale, to a good degree of accuracy. We quantify this observation by presenting results for the evolution of off-diagonal distributions from a variety of different inputs.