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ALP inflation and Big Bang on Earth

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arxiv 1903.00462 v3 pith:JHC2B5AE submitted 2019-03-01 hep-ph astro-ph.COgr-qc

ALP inflation and Big Bang on Earth

classification hep-ph astro-ph.COgr-qc
keywords inflationbangexperimentsmodelreheatingrelationaboveaxion-like
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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Cited by 1 Pith paper

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