We investigate the weak decay of one-neutron halo nuclei into the proton-core continuum, i.e., $\beta$-delayed proton emission from the halo nucleus using a cluster effective field theory for halo nuclei. On the one hand, we calculate the direct decay into the continuum. On the other hand, we consider the case of resonant final state interactions between the proton and the core. We present our formalism and discuss the application to the decay of ${}^{11}\mathrm{Be}$ in detail. Moreover, we compare to recent experimental results for the branching ratio and resonance parameters. As another example, we consider the case of ${}^{19}\mathrm{C}$ and predict the branching ratio for $\beta$-delayed proton emission.

• Received 19 December 2022
• Revised 1 May 2023
• Accepted 14 June 2023

DOI:https://doi.org/10.1103/PhysRevC.108.015501