WHIZARD—simulating multi-particle processes at LHC and ILC
WHIZARD—simulating multi-particle processes at LHC and ILC
复制标题
DOI：
10.1140/epjc/s10052-011-1742-y
复制
发表时间：
2007-08
期刊：
影响因子：
--
通讯作者：
W. Kilian;T. Ohl;J. Reuter
中科院分区：
文献类型：
--
作者：
W. Kilian;T. Ohl;J. Reuter
我们描述了通用的蒙特卡罗（部分级）事件生成器whizard (http://whizard.event-generator.org)，版本2。该程序自动计算完整的树级矩阵元素，在相空间上集成它们，评估可观测的分布，并生成未加权的部分事件样本。通过调用外部代码，可以从程序内部自动调用，也可以通过标准接口调用。过程的复杂性没有概念上的限制；利用现有的硬件，该程序已成功地应用于硬散射过程中，最终状态有多达八个粒子。矩阵元素以螺旋振幅计算，因此保留了自旋和颜色相关性。对于事件生成，过程可以与全自旋相关连接，因此当不需要完整的矩阵元素时，可以对级联衰减进行因式近似。标准模型，MSSM和许多替代模型，如小希格斯，异常耦合，或额外维度或非交换SM扩展的影响已经实现。使用标准接口的部分淋浴和强子化程序，whizard涵盖物理强子，轻子和光子对撞机。
We describe the universal Monte-Carlo (parton-level) event generatorWHIZARD( http://whizard.event-generator.org ), version 2. The program automatically computes complete tree-level matrix elements, integrates them over phase space, evaluates distributions of observables, and generates unweighted partonic event samples. These are showered and hadronized by calling external codes, either automatically from within the program or via standard interfaces. There is no conceptual limit on the process complexity; using current hardware, the program has successfully been applied to hard scattering processes with up to eight particles in the final state. Matrix elements are computed as helicity amplitudes, so spin and color correlations are retained. For event generation, processes can be concatenated with full spin correlation, so factorized approximations to cascade decays are possible when complete matrix elements are not desired. The Standard Model, the MSSM, and many alternative models such as Little Higgs, anomalous couplings, or effects of extra dimensions or noncommutative SM extensions have been implemented. Using standard interfaces to parton shower and hadronization programs,WHIZARDcovers physics at hadron, lepton, and photon colliders.