TY - EJOUR AU - Schuh, Dominic AU - Luu, Tom TI - Two particles interacting via a contact interaction on $S^2$ IS - arXiv:2204.06263 M1 - FZJ-2022-04403 M1 - arXiv:2204.06263 PY - 2022 N1 - 24 pages, 6 figures AB - We consider two particles interacting via a contact interaction that are constrained to a sphere, or $S^2$. We determine their spectrum to arbitrary precision and for arbitrary angular momentum. We show how the non-inertial frame leads to non-trivial solutions for different angular momenta. Our results represent an extension of the finite-volume L\'uscher formulas but now to a non-trivial geometry. We apply our results to predict the spectrum of select two-nucleon halo nuclei and compare with experimental results. LB - PUB:(DE-HGF)25 UR - https://juser.fz-juelich.de/record/911077 ER -