Reheating-induced axion dark matter after low scale inflation

Abstract A kinetic mixing between the axion and the inflaton allows for a production of axion dark matter even if the inflationary Hubble scale is smaller than the zero-temperature axion mass. We analyze the axion dynamics in this recently discovered “inflaxion” frame- work, and present a new cosmol...

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Main Authors: Takeshi Kobayashi, Lorenzo Ubaldi
Format: Article
Language:English
Published: SpringerOpen 2020-09-01
Series:Journal of High Energy Physics
Subjects:
Online Access:http://link.springer.com/article/10.1007/JHEP09(2020)052
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spelling doaj-64cac8df998a45b0b5f035778352a0682020-11-25T03:31:03ZengSpringerOpenJournal of High Energy Physics1029-84792020-09-012020912710.1007/JHEP09(2020)052Reheating-induced axion dark matter after low scale inflationTakeshi Kobayashi0Lorenzo Ubaldi1Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya UniversitySISSA and INFN Sezione di TriesteAbstract A kinetic mixing between the axion and the inflaton allows for a production of axion dark matter even if the inflationary Hubble scale is smaller than the zero-temperature axion mass. We analyze the axion dynamics in this recently discovered “inflaxion” frame- work, and present a new cosmological scenario where the axion drifts away from its vacuum during the reheating epoch, giving rise to the observed dark matter abundance. We discuss the implications for both the QCD axion and axion-like particles.http://link.springer.com/article/10.1007/JHEP09(2020)052Cosmology of Theories beyond the SMEffective Field Theories
collection DOAJ
language English
format Article
sources DOAJ
author Takeshi Kobayashi
Lorenzo Ubaldi
spellingShingle Takeshi Kobayashi
Lorenzo Ubaldi
Reheating-induced axion dark matter after low scale inflation
Journal of High Energy Physics
Cosmology of Theories beyond the SM
Effective Field Theories
author_facet Takeshi Kobayashi
Lorenzo Ubaldi
author_sort Takeshi Kobayashi
title Reheating-induced axion dark matter after low scale inflation
title_short Reheating-induced axion dark matter after low scale inflation
title_full Reheating-induced axion dark matter after low scale inflation
title_fullStr Reheating-induced axion dark matter after low scale inflation
title_full_unstemmed Reheating-induced axion dark matter after low scale inflation
title_sort reheating-induced axion dark matter after low scale inflation
publisher SpringerOpen
series Journal of High Energy Physics
issn 1029-8479
publishDate 2020-09-01
description Abstract A kinetic mixing between the axion and the inflaton allows for a production of axion dark matter even if the inflationary Hubble scale is smaller than the zero-temperature axion mass. We analyze the axion dynamics in this recently discovered “inflaxion” frame- work, and present a new cosmological scenario where the axion drifts away from its vacuum during the reheating epoch, giving rise to the observed dark matter abundance. We discuss the implications for both the QCD axion and axion-like particles.
topic Cosmology of Theories beyond the SM
Effective Field Theories
url http://link.springer.com/article/10.1007/JHEP09(2020)052
work_keys_str_mv AT takeshikobayashi reheatinginducedaxiondarkmatterafterlowscaleinflation
AT lorenzoubaldi reheatinginducedaxiondarkmatterafterlowscaleinflation
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