$LimitTo4IRUnsafe
is a global variable that determines whether the simplifications described in $LimitTo4
are applied also to and Passarino-Veltman functions. In this case it is assumed that such functions are either IR finite, or the IR divergences are regulated without using dimensional regularization (i.e. by introducing fictitious masses). Otherwise the results will be inconsistent. If this option is activated, it is the task of the user to ensure that IR divergences are properly regulated, such that no mixing of from IR and UV can occur. The default value is False
.
Overview, PaVe, PaVeReduce, OneLoop, $LimitTo4, PaVeLimitTo4.
$LimitTo4IRUnsafe