Issues with vacuum energy as the origin of dark energy
  In this letter we address some of the issues raised in the literature about
the conflict between a large vacuum energy density, apriori predicted by
quantum field theory, and the observed dark energy which must be the energy of
vacuum or include it. We present a number of arguments against this claim and
in favour of a null vacuum energy. They are based on the following arguments: A
new definition for the vacuum in quantum field theory as a frame-independent
coherent state; Results from a detailed study of condensation of scalar fields
in FLRW background performed in a previous work; And our present knowledge
about the Standard Model of particle physics. One of the predictions of these
arguments is the confinement of nonzero expectation value of Higgs field to
scales roughly comparable with the width of electroweak gauge bosons or
shorter. If the observation of Higgs by the LHC is confirmed, accumulation of
relevant events and their energy dependence in near future should allow to
measure the spatial extend of the Higgs condensate.
