particle physics

Candia-v2: Logarithmic expansions for DGLAP evolution in -space

arXiv:2607.14151

summary

The paper introduces Candia-v2, an open‑source software that solves the DGLAP evolution equations for unpolarized nucleon parton distribution functions at next‑to‑next‑to‑next‑to‑leading order using a logarithmic expansion in x‑space.

Abstract

We present Candia-v2, an open-source software package that generalizes the -space Candia algorithm to next-to-next-to-next-to-leading order (NLO) accuracy in Quantum Chromodynamics (QCD). The code solves the DGLAP evolution equations for unpolarized nucleon parton densities using a highly efficient logarithmic expansion technique that can be systematically extended to all orders in QCD. Candia-v2 supersedes the previous original C implementation of the algorithm with significantly increased efficiency and improved API. The software is publicly available on GitHub under the GPLv3 license.

48 pages, 2 tables, 3 figures, regular article

Topics & keywords

#dglap evolution#parton distribution functions#x-space methods#higher-order qcd#open-source softwareCandia-v2N3LOlogarithmic expansionunpolarized nucleon PDFsGPLv3