CIR the corresponding transmission coefficient touches the $p$-wave CI unitarity bound and thus we encounter a suppression of the transmission with a complete blockade $T=0$ for the case $\epsilon < 1$. Away from a free-space resonance the scattering length quickly decreases to its small background value leading to the large value of the transmission coefficient away from a resonance. Furthermore we observe that in the case of $p$-wave interactions the value of $T_i^{(1)}$ taken at the channel thresholds indeed strongly depends on the scaled $p$-wave scattering length, which drastically differs from the case of $\ell=0$ thus rendering the threshold behavior for $\ell=0$ universal with respect to the $s$-wave scattering length.

### The decoupling energies {#sss:decoupling_energy}

![(Color online) (a) Transmission coefficients at the decoupling energies $\lfloor
  {\epsilon}^*_0\rfloor+\Delta{\epsilon}^*_0$ versus the scaled $s$-wave scattering length ${\bar{a}_{0}}$. Different curves depict the transmission coefficients for up to three open channels. The symmetric line shape centered around the non-interacting case ${\bar{a}_{0}}=0$ indicates an effective decoupling from the closed channels of the waveguide. For large values of $|{\bar{a}_{0}}|$, the transmission approaches the values given by Eq. . The case of $\ell=1$ is shown in (b) for energies $\lfloor {\epsilon}^*_1\rfloor+\Delta{\epsilon}^*_1$.[]{data-label="fig:transmission_decouple_sp"}](figures/figure4.eps){width="45.00000%"}

In Ref. [@hess2014] it was shown that the 