  Recently there has been an interest in studying the role that geometry may
play in the problem of confining fermions to our four-dimensional spacetime. In
general, the focus is on non-Riemannian geometries which possess fields like
torsion and non-metricity. In this paper, the degrees of freedom present in the
spin connection in a Riemannian manifold are used to confine fermions. It turns
out that one can use this connection to trap these particles inside a brane.

General Relativity and Quantum Cosmology;High Energy Physics - Phenomenology