| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1840709 | Nuclear Physics B | 2014 | 22 Pages |
Abstract
Following the previous paper arXiv:1205.4827, we formulate an S-matrix functional for massive fermion ultra-helicity-violating (UHV) amplitudes, i.e., scattering amplitudes of positive-helicity gluons and a pair of massive fermions. The S-matrix functional realizes a massive extension of the Cachazo–Svrcek–Witten (CSW) rules in a functional language. Mass-dimension analysis implies that interactions among gluons and massive fermions should be decomposed into three-point massive fermion subamplitudes. Namely, such interactions are represented by combinations of three-point UHV and next-to-UHV (NUHV) vertices. This feature is qualitatively different from the massive scalar amplitudes where the number of involving gluons can be arbitrary.
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
Yasuhiro Abe,