  We present localized 'particle-like' states composed of a pair of neutral
fermions interacting with a scalar Higgs field and the metric of spacetime,
extending the Einstein-Dirac formalism introduced by Finster, Smoller, and Yau
[Phys. Rev. D 59, 104020 (1999)]. We demonstrate that, when the coupling
between the fermions and the Higgs field is strong, there is a class of states
in which the total (ADM) mass no longer increases proportionally to the mass of
the constituent fermions; indeed it decreases. This phenomenon enables
fermionic particles with much larger masses than in the Higgs-free case to form
localized states.
