Smooth-cutoff scalar propagator
= Smooth-cutoff scalar propagator
{title2=$C_\Lambda(p)=1/f_\Lambda((p^2+m^2)/\Lambda^2)$}
A <smooth-cutoff scalar propagator> is the inverse of a positive regulated quadratic kernel. It agrees with the unregulated <scalar propagator> at low <momentum> and decreases rapidly at high <momentum>. Smooth suppression is not identical to vanishing support. Its cutoff derivative is the line weight in an exact <renormalization-group flow>.