ALP inflation and Big Bang on Earth
  We study a hilltop inflation model where an axion-like particle (ALP) plays
the role of the inflaton. We find that, for a broad class of potentials, the
decay constant and the mass at the potential minimum satisfy the relation,
$m_\phi \sim 10^{-6} f$, to explain the CMB normalization. The ALP is
necessarily coupled to the standard model particles for successful reheating.
The ALP with the above relation can be searched at beam dump experiments, e.g.,
the SHiP experiment, if the inflation scale is sufficiently low. In this case,
the ALP decays through the interactions that led to the reheating of the
Universe. In other words, the Big Bang may be probed at ground-based
experiments.
