The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
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DOI：
10.1007/jhep07(2014)079
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发表时间：
2014-07-17
影响因子：
5.4
通讯作者：
Zaro, M.
中科院分区：
文献类型：
--
作者：
Alwall, J.;Frederix, R.;Zaro, M.
我们讨论的理论基础，支持自动化的计算的树级和下一个领导阶截面，他们的匹配部分子簇射模拟，并合并不同的光部分子多重性的匹配样本。我们提出了一个计算机程序，MadGraph5_AMC@NLO，能够处理所有这些计算-部分子级固定顺序，匹配，合并-在一个统一的框架，其定义的功能是灵活性，高水平的并行化，和人为干预限制输入物理量。我们展示了该计划的潜力，提出有关的大型强子对撞机和1-TeV的电子（+）电子（-）对撞机选择的唯象应用。虽然下一个领先的顺序结果仅限于QCD校正SM过程中的第一个公开版本，我们表明，从用户的角度来看，没有变化的情况下，由于任何给定的可重正化拉格朗日修正预期，这些实施正在顺利进行。
We discuss the theoretical bases that underpin the automation of the computations of tree-level and next-to-leading order cross sections, of their matching to parton shower simulations, and of the merging of matched samples that differ by light-parton multiplicities. We present a computer program, MadGraph5_AMC@NLO, capable of handling all these computations - parton-level fixed order, shower-matched, merged - in a unified framework whose defining features are flexibility, high level of parallelisation, and human intervention limited to input physics quantities. We demonstrate the potential of the program by presenting selected phenomenological applications relevant to the LHC and to a 1-TeV e (+) e (-) collider. While next-to-leading order results are restricted to QCD corrections to SM processes in the first public version, we show that from the user viewpoint no changes have to be expected in the case of corrections due to any given renormalisable Lagrangian, and that the implementation of these are well under way.