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Primordial Black Holes from the QCD Axion
Ferrer, Francesc (Institut de Física d'Altes Energies)
Massó i Soler, Eduard 1954- (Universitat Autònoma de Barcelona. Departament de Física)
Panico, Giulianio (National Institute of Chemical Physics and Biophysics (Tallinn, Estònia). Laboratory of High Energy and Computational Physics)
Pujolàs Boix, Oriol (Institut de Física d'Altes Energies)
Rompineve, Fabrizio (Institut de Física d'Altes Energies)

Date: 2019
Abstract: We propose a mechanism to generate primordial black holes (PBHs) that is independent of cosmological inflation and occurs slightly below the QCD phase transition. Our setup relies on the collapse of long-lived string-domain wall networks and is naturally realized in QCD axion models with domain wall number NDW>1 and Peccei-Quinn symmetry broken after inflation. In our framework, dark matter is mostly composed of axions in the meV mass range along with a small fraction,ΩPBH≳10− 6 Ω CDM of heavy M∼104−107M⊙PBHs. The latter could play a role in alleviating some of the shortcomings of the standard cosmological model on subgalactic scales. The scenario might have distinct signatures in ongoing axion searches as well as gravitational wave observatories.
Grants: Ministerio de Economía y Competitividad FPA-2014-55613-P
Ministerio de Economía y Competitividad SO-2012-0234
Ministerio de Economía y Competitividad SEV-2016-0588
Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1450
Rights: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Language: Anglès
Document: Article ; recerca ; Versió publicada
Subject: Cosmological modeling ; Gravitational-wave observatory ; Primordial black holes
Published in: Physical review letters, Vol. 122, Issue 10 (March 2019) , art. 101301, ISSN 1079-7114

DOI: 10.1103/PhysRevLett.122.101301
PMID: 30932654


6 p, 349.8 KB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Institut de Física d’Altes Energies (IFAE)
Articles > Research articles
Articles > Published articles

 Record created 2020-06-03, last modified 2022-04-06



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