Inflationary flavor oscillations and the cosmic spectroscopy
  We show that generic inflationary scenarios, featuring any number of scalar
fluctuations beyond the curvature perturbation, that we dub inflationary flavor
eigenstates for their particular interactions with the latter, and that mix
with the freely propagating inflationary mass eigenstates, may be probed via a
cosmic spectroscopy. Indeed, the three-point function of the primordial
curvature perturbation displays, in the squeezed limit, a new striking behavior
that depends not only on the mass spectrum but also on the mixing angles of the
theory: modulated oscillations, a broken power law, or a transition from
oscillations to a power law.
