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QCD axions and axionlike particles in a two-inflation scenario

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Title: QCD axions and axionlike particles in a two-inflation scenario
Authors: Hoof, S
Jaeckel, J
Item Type: Journal Article
Abstract: We investigate the phenomenology of QCD axions and axionlike particles in a scenario with two eras of inflation. In particular, we describe the possible solutions for the QCD axion field equation after the second inflation and reheating. We calculate the dilution numerically for QCD axions and give an analytic approximation for axionlike particles. While it has been realized before that such a scenario can dilute the axion energy density and open up the parameter space for the axion decay constant f A , we find that even a small increase in the relative QCD axion energy density is possible.
Issue Date: 20-Dec-2017
Date of Acceptance: 29-Nov-2017
URI: http://hdl.handle.net/10044/1/54411
DOI: 10.1103/PhysRevD.96.115016
ISSN: 1550-2368
Publisher: American Physical Society
Start Page: 115016 – 1
End Page: 115016 – 13
Journal / Book Title: Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume: 96
Copyright Statement: © 2017 American Physical Society
Keywords: 0201 Astronomical and Space Sciences
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
0206 Quantum Physics
Nuclear & Particles Physics
Publication Status: Published
Online Publication Date: 2017-12-20
Appears in Collections:Physics
Faculty of Natural Sciences