pyrecola.set_light_fermions_rcl

set_light_fermions_rcl(mcut)

Sets a masscut mcut below which massive fermions are treated as light particles, i.e. their collinear singularities are regularized with their mass and regular terms proportional to the mass are discarded). Massive fermions with a mass larger than mcut are considered heavy which means that their full mass dependence is kept.

Parameters

mcut – masscut value

Note

This function has no effect on massless fermions and the corresponding collinear singularities are regularized dimensionally).