Automated Computation of One-Loop Amplitudes

IF 9.1 2区物理与天体物理 Q1 PHYSICS, NUCLEAR

Annual Review of Nuclear and Particle Science Pub Date : 2018-10-19 DOI:10.1146/ANNUREV-NUCL-101917-020959

C. Degrande, V. Hirschi, O. Mattelaer

引用次数: 3

Abstract

The automation of one-loop amplitudes plays a key role in addressing several computational challenges for hadron collider phenomenology: They are needed for simulations including next-to-leading-order corrections, which can be large at hadron colliders. They also allow the exact computation of loop-induced processes. A high degree of automation has now been achieved in public codes that do not require expert knowledge and can be widely used in the high-energy physics community. In this article, we review many of the methods and tools used for the different steps of automated one-loop amplitude calculations: renormalization of the Lagrangian, derivation and evaluation of the amplitude, its decomposition onto a basis of scalar integrals and their subsequent evaluation, as well as computation of the rational terms.

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单回路振幅的自动计算

单环振幅的自动化在解决强子对撞机现象学的几个计算挑战方面发挥着关键作用：它们是模拟所必需的，包括在强子对撞机中可能很大的次序校正。它们还允许精确计算循环诱导过程。现在，在不需要专家知识的公共代码中已经实现了高度自动化，并且可以在高能物理界广泛使用。在这篇文章中，我们回顾了用于自动单环振幅计算的不同步骤的许多方法和工具：拉格朗日量的重整化、振幅的推导和评估、将其分解到标量积分的基础上及其后续评估，以及有理项的计算。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Annual Review of Nuclear and Particle Science 物理-物理：核物理

CiteScore

21.50

自引率

0.80%

发文量

期刊介绍： The Annual Review of Nuclear and Particle Science is a publication that has been available since 1952. It focuses on various aspects of nuclear and particle science, including both theoretical and experimental developments. The journal covers topics such as nuclear structure, heavy ion interactions, oscillations observed in solar and atmospheric neutrinos, the physics of heavy quarks, the impact of particle and nuclear physics on astroparticle physics, and recent advancements in accelerator design and instrumentation. One significant recent change in the journal is the conversion of its current volume from gated to open access. This conversion was made possible through Annual Reviews' Subscribe to Open program. As a result, all articles published in the current volume are now freely available to the public under a CC BY license. This change allows for greater accessibility and dissemination of research in the field of nuclear and particle science.