Vacuum energy and dynamical symmetry breaking in curved spacetime
  We argue that calculating vacuum energy requires quantum field theory whose
axioms are adapted to curved spacetime. In this context, we suggest that
non-zero vacuum energy is connected to dynamical breaking of electroweak
symmetry. The observed meV scale can be understood in terms of electroweak
physics via a naive estimate. The scenario requires all particle masses to have
a dynamical origin. Any Higgs particle has to be a composite, and the origin of
vacuum energy might be probed at the LHC.
