Higgs-like spectator field as the origin of structure
  We show that the observed primordial perturbations can be entirely sourced by
a light spectator scalar field with a quartic potential, akin to the Higgs
boson, provided that the field is sufficiently displaced from vacuum during
inflation. The framework relies on the indirect modulation of reheating, which
is implemented without any direct coupling between the spectator field and the
inflaton and does not require non-renormalisable interactions. The scenario
gives rise to local non-Gaussianity with $f_{\rm NL}\simeq 5$ as the typical
signal. As an example model where the indirect modulation mechanism is realised
for the Higgs boson, we study the Standard Model extended with right-handed
neutrinos. For the Standard Model running we find, however, that the scenario
analysed does not seem to produce the observed perturbation.
