QCD axions and axionlike particles in a two-inflation scenario
File(s)
Accepted version
Author(s)
Hoof, S
Jaeckel, J
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.
f
A
, we find that even a small increase in the relative QCD axion energy density is possible.
Date Issued
2017-12-20
Date Acceptance
2017-11-29
Citation
Physical Review D - Particles, Fields, Gravitation and Cosmology, 2017, 96, pp.115016 – 1-115016 – 13
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
Identifier
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.96.115016
Subjects
0201 Astronomical and Space Sciences
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
0206 Quantum Physics
Nuclear & Particles Physics
Publication Status
Published
Date Publish Online
2017-12-20