  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.
