Emergence of 4H Jπ = 1− resonance in contact theories

We obtain the s- and p-wave low-energy scattering parameters for n3H elastic scattering and the position of the 4H Jπ=1− resonance using the pionless effective field theory at leading order. Results are extracted with three numerical techniques: confining the system in a harmonic oscillator trap, solving the Faddeev-Yakubovsky equations in configuration space, and using an effective two-body cluster approach. The renormalization of the theory for the relevant amplitudes is assessed in a cutoff-regulator range between 1fm−1 and 10fm−1.