PyR@TE 3

TL;DR

PyR@TE 3 is an advanced Python tool that efficiently computes renormalization group equations for various gauge theories, now supporting three-loop calculations and improved performance.

Contribution

It introduces a new core based on recent theoretical work, enabling three-loop beta function computations and enhanced flexibility and speed.

Findings

Supports three-loop gauge coupling calculations

Improved computation speed and user interface

Automatically satisfies Weyl consistency relations

Abstract

We present a new version of PyR@TE, a Python tool for the computation of renormalization group equations for general, non-supersymmetric gauge theories. Its new core relies on a recent paper by Poole & Thomsen (arXiv:1906.04625) to compute the $\beta$-functions. In this framework, gauge kinetic mixing is naturally implemented, and the Weyl consistency relations between gauge, quartic and Yukawa couplings are automatically satisfied. One of the main new features is the possibility for the user to compute the gauge coupling $\beta$-functions up to the three-loop order. Large parts of the PyR@TE code have been rewritten and improved, including the group theory module PyLie. As a result, the overall performance in terms of computation speed was drastically improved and the model file is more flexible and user-friendly.