论文标题
Griffin：用于耗电散射和衰减过程中的Electroweak辐射校正的C ++库
GRIFFIN: A C++ library for electroweak radiative corrections in fermion scattering and decay processes
论文作者
论文摘要
本文介绍了一个模块化框架，用于描述电子散射和衰减过程，包括但不限于Z-Resonance Physics。该框架始终将S-Channel共振附近的复杂杆扩展与明显的规格不变方案相结合的常规固定顺序扰动描述。领先的顶点校正贡献被封装在可以预测或视为数值拟合参数的形式因素中。 该框架已在公开面向对象的C ++库Griffin中实现。此库的1.0版为该过程提供了标准模型预测$ f \ bar {f} \ f'\ bar {f}'$，并具有完整的nnlo，并在z谐振方面进行了领先的高阶贡献，并具有nlo校正后的共振。图书馆可以直接扩展到包括高阶校正，如果它们可用，或者对新物理模型的预测。它可以与蒙特卡洛计划连接，以说明QED和QCD初始状态和最终状态辐射。
This paper describes a modular framework for the description of electroweak scattering and decay processes, including but not limited to Z-resonance physics. The framework consistently combines a complex-pole expansion near a s-channel resonance with a regular fixed-order perturbative description away from the resonance, in a manifestly gauge-invariant scheme. Leading vertex correction contributions are encapsulated in form factors that can be predicted or treated as numerical fit parameters. This framework has been implemented in the publicly available object-oriented C++ library GRIFFIN. Version 1.0 of this library provides Standard Model predictions for the process $f\bar{f} \to f'\bar{f}'$ with full NNLO and leading higher-order contributions on the Z-resonance, and with NLO corrections off resonance. The library can straightforwardly be extended to include higher-order corrections, should they become available, or predictions for new physics models. It can be interfaced with Monte-Carlo programs to account for QED and QCD initial-state and final-state radiation.
