  We discuss resonant leptogenesis arising from the decays of two
nearly-degenerate right-handed neutrinos, identified as the inflaton and
stabiliser superfields in a model of chaotic sneutrino inflation. We compare an
analytical estimate of the baryon asymmetry $ \eta_B $ in the Boltzmann
approximation to a numerical solution of the full density matrix equations, and
find that the analytical result fails to capture the correct physics in certain
regions of parameter space. The observed baryon asymmetry can be realised for a
breaking of the mass degeneracy as small as $ \mathcal{O}(10^{-8}) $. The
origin of such a small mass splitting is explained by considering supersymmetry
(SUSY) breaking in supergravity, which requires a constant in the
superpotential of the order of the gravitino mass $ m_{3/2} $ to cancel the
cosmological constant. This yields additional terms in the (s)neutrino mass
matrices, lifting the degeneracy and linking $ \eta_B $ to the SUSY breaking
scale. We find that achieving the correct baryon asymmetry requires a gravitino
mass $ m_{3/2} \geq \mathcal{O}(100) $ TeV.
