One-loop matter trispectrum ($T_{1-\mathrm{loop}}$)

For Gaussian initial conditions, the one-loop connected matter trispectrum contains the perturbative-order classes $T_{5111}$, $T_{4211}$, $T_{3311}$, $T_{3221}$, and $T_{2222}$. Each class includes every inequivalent external-leg assignment and Wick contraction.