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arXiv · 2508.19018

A simple algorithm for polarized parton evolution

Stefan Höche·Mareen Hoppe·Daniel Reichelt
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Abstract

We present an algorithm to include the correlation between the production and decay planes of gluons in a parton-shower simulation. The technique is based on identifying the charge currents responsible for the creation and annihilation of the vector field. It is applicable in both the hard-collinear and the soft wide-angle region. As a function of the number of particles, the algorithm scales linear in computing time and memory. We demonstrate agreement with fixed-order perturbative calculations in the relevant kinematical limits, and present a new observable that can be used to probe correlations beyond current-current interactions.

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Stefan Höche, Mareen Hoppe, Daniel Reichelt. 2025-08-26. A simple algorithm for polarized parton evolution. https://arxiv.org/abs/2508.19018

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