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 results, the overall performance in terms of computation speed was drastically improved and the model file is more flexible and user-friendly.

中文翻译：

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PyR@TE 3

我们提出了 PyR@TE 的新版本，这是一种 Python 工具，用于计算一般非超对称规范理论的重整化群方程。它的新核心依赖于 Poole & Thomsen 最近的一篇论文 (arXiv:1906.04625) 来计算 $\beta$ 函数。在这个框架中，规范动力学混合自然实现，规范、四次和 Yukawa 耦合之间的 Weyl 一致性关系自动满足。主要的新功能之一是用户可以计算高达三环阶的规范耦合 $\beta$ 函数。PyR@TE 代码的大部分已被重写和改进，包括群论模块 PyLie。结果，在计算速度方面的整体性能得到了显着提高，模型文件更加灵活和用户友好。