REvolver: Automated running and matching of couplings and masses in QCD

TL;DR

REvolver is a versatile C++ library that automates the renormalization group evolution and flavor matching of QCD parameters, improving precision in quark mass scheme conversions and supporting multiple interfaces.

Contribution

It introduces REvolver, a new library that systematically automates QCD parameter evolution and matching, including complex scales and multiple programming interfaces.

Findings

Accurately performs QCD coupling and mass evolution.

Provides automatic flavor matching across scales.

Supports multiple programming environments.

Abstract

In this article we present REvolver, a C++ library for renormalization group evolution and automatic flavor matching of the QCD coupling and quark masses, as well as precise conversion between various quark mass renormalization schemes. The library systematically accounts for the renormalization group evolution of low-scale short-distance masses which depend linearly on the renormalization scale and sums logarithmic terms of high and low scales that are missed by the common logarithmic renormalization scale evolution. The library can also be accessed through Mathematica and Python interfaces and provides renormalization group evolution for complex renormalization scales as well.