  The phenomenon of spontaneous symmetry breaking admits a physical
interpretation in terms of the Bose-condensation process of elementary spinless
quanta. In this picture, the broken-symmetry phase emerges as a real physical
medium, endowed with a hierarchical pattern of scales, supporting two types of
elementary excitations for k \to 0: a massive energy branch E_a(k) \to M_H,
corresponding to the usual Higgs boson field, and a collective gap-less branch
E_b(k) \to 0. This is similar to the coexistence of phonons and rotons in
superfluid He-4 that, in fact, is usually considered the condensed-matter
analog of the Higgs condensate.
  After previous work dedicated to the properties of the gap-less, phonon
branch, in this paper we use quantum hydrodynamics to propose a physical
interpretation of the massive branch. On the base of our results, M_H coincides
with the energy-gap for vortex formation and a massive Higgs boson is like a
roton in superfluid He-4. Within this interpretation of the Higgs particle,
there is no "naturalness" problem since M_H remains a naturally intermediate,
fixed energy scale, even for an ultimate ultraviolet cutoff Lambda \to \infty.
