论文标题
具有多个费米线的振幅的新方法
A new approach for amplitudes with multiple fermion lines
论文作者
论文摘要
提出了一种具有多个费米线线的树级振幅的新方法。它主要集中于简化费米线线。通过在没有任何矩阵乘法的情况下递归计算两个矢量，Fermion线的结果仅取决于两个向量。提出了与其他软件包的比较，结果表明，我们的软件包FDC在多个费米昂线的过程中具有很好的性能，并具有这种新方法和其他一些改进。与Whizard的进一步比较表明，这种新方法在计算纯振幅平方而没有相空间集成方面具有竞争效率。
A new approach for tree-level amplitudes with multiple fermion lines is presented. It mainly focuses on the simplification of fermion lines. By calculating two vectors recursively without any matrix multiplications, the result of a fermion line is reduced to a very compact form depending only on the two vectors. The comparisons with other packages are presented, and the results show that our package FDC gives a very good performance in the processes of multiple fermion lines with this new approach and some other improvements. A further comparison with WHIZARD shows that this new approach has a competitive efficiency in computing pure amplitude square without phase space integration.
