Non-thermal Production of PNGB Dark Matter and Inflation - INSPIRE

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Non-thermal Production of PNGB Dark Matter and Inflation

Dec 18, 2020

23 pages

Published in:

JHEP 03 (2021) 130

Published: Mar 11, 2021

e-Print:

2012.10286 [hep-ph]

DOI:

10.1007/JHEP03(2021)130

Report number:

KUNS-2849

View in:

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Abstract: (arXiv)

A pseudo Nambu-Goldstone boson (pNGB) is a natural candidate of dark matter in that it avoids the severe direct detection bounds. We show in this paper that the pNGB has another different and interesting face with a higher symmetry breaking scale. Such large symmetry breaking is motivated by various physics beyond the standard model. In this case, the pNGB interaction is suppressed due to the Nambu-Goldstone property and the freeze-out production does not work even with sufficiently large portal coupling. We then study the pNGB dark matter relic abundance from the out-of-equilibrium production via feeble Higgs portal coupling. Further, a possibility is pursued the symmetry breaking scalar in the pNGB model plays the role of inflaton. The inflaton and dark matter are unified in a single field and the pNGB production from inflaton decay is inevitable. For these non-thermally produced relic abundance of pNGB dark matter and successful inflation, we find that the dark matter mass should be less than a few GeV in the wide range of the reheating temperature and the inflaton mass.

Note:

23 pages, 8 figures, version to appear in JHEP

Beyond Standard Model
Cosmology of Theories beyond the SM
dark matter: relic density
dark matter: mass
Goldstone particle: production
inflaton: mass
symmetry breaking: scale
inflaton: decay
temperature: reheating
inflation

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