Higgs inflation at the critical point
  Higgs inflation can occur if the Standard Model (SM) is a self-consistent
effective field theory up to inflationary scale. This leads to a lower bound on
the Higgs boson mass, $M_h \geq M_{\text{crit}}$. If $M_h$ is more than a few
hundreds of MeV above the critical value, the Higgs inflation predicts the
universal values of inflationary indexes, $r\simeq 0.003$ and $n_s\simeq 0.97$,
independently on the Standard Model parameters. We show that in the vicinity of
the critical point $M_{\text{crit}}$ the inflationary indexes acquire an
essential dependence on the mass of the top quark $m_t$ and $M_h$. In
particular, the amplitude of the gravitational waves can exceed considerably
the universal value.
