A new approach for amplitudes with multiple fermion lines
High Energy Physics - Phenomenology
2022-06-28 v2
Abstract
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.
Cite
@article{arxiv.2203.14346,
title = {A new approach for amplitudes with multiple fermion lines},
author = {Feng Zhang and Bin Gong and Jian-Xiong Wang},
journal= {arXiv preprint arXiv:2203.14346},
year = {2022}
}
Comments
9 pages, 1 figure