A Higgs--Saw Mechanism as a Source for Dark Energy
  Motivated by the see-saw mechanism for neutrinos which naturally generates
small neutrino masses, we explore how a small GUT-scale mixing between the
Standard Model Higgs and an otherwise massless hidden sector scalar can
naturally generate a small mass and VEV for the new scalar which produces a
false vacuum energy density contribution comparable to that of the observed
dark energy dominating the current expansion of the Universe. The new scalar
produces no discernible signatures in existing terrestrial experiments so that
one may have to rely on other cosmological tests of this idea.
