The Minimal Dimensionless Standard Model (MDSM) and its Cosmology
  Consider the minimal renormalizable extension of the Standard Model with
purely dimensionless couplings, successful electroweak symmetry breaking (via
the Coleman-Weinberg mechanism) and a see-saw mechanism for neutrino mass: we
will call this the Minimal Dimensionless Standard Model (MDSM). In fact, 3
closely related models fit the bill: MDSM_1, MDSM_2 and MDSM_3. We analyze the
theoretical and observational constraints on these models. We argue that, when
they are minimally coupled to gravity, they can accomplish several important
cosmological tasks (inflation, dark matter, leptogenesis) in a way that is
economical, predictive and tightly woven into the fabric of known physics. One
of the models (MDSM_3), which includes an extra U(1)_{B-L} gauge symmetry,
seems particularly promising.
