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Axion miniclusters in modified cosmological histories
Nordita SU.ORCID-id: 0000-0001-7958-8940
Univ Zaragoza, Dept Fis Teor, C Pedro Cerbuna 12, E-50009 Zaragoza, Spain.;Max Planck Inst Phys & Astrophys, Foehringer Ring 6, D-80805 Munich, Germany..
2020 (engelsk)Inngår i: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 101, nr 2, artikkel-id 023008Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

If the symmetry breaking leading to the origin of the axion dark matter field occurs after the end of inflation and is never restored, then overdensities in the axion field collapse to form dense objects known in the literature as axion miniclusters. The estimates of the typical minicluster mass and radius strongly depend on the details of the cosmology at which the onset of axion oscillations begin. In this work we study the properties and phenomenology of miniclusters in alternative cosmological histories and find that they can change by many orders of magnitude. Our findings have direct implications on current and future experimental searches and, in the case of discovery, could be used to learn something about the universe expansion prior to big bang nucleosynthesis.

sted, utgiver, år, opplag, sider
AMER PHYSICAL SOC , 2020. Vol. 101, nr 2, artikkel-id 023008
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URN: urn:nbn:se:kth:diva-267160DOI: 10.1103/PhysRevD.101.023008ISI: 000506846100005Scopus ID: 2-s2.0-85078213316OAI: oai:DiVA.org:kth-267160DiVA, id: diva2:1393513
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QC 20200217

Tilgjengelig fra: 2020-02-17 Laget: 2020-02-17 Sist oppdatert: 2023-01-04bibliografisk kontrollert

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Visinelli, Luca
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