@Article{Caputo+Reig2019,
author="Caputo, A.
and Reig, M.",
title="Cosmic implications of a low-scale solution to the axion domain wall problem",
journal="Physical Review D",
year="2019",
publisher="Amer Physical Soc",
volume="100",
number="6",
pages="063530--10pp",
abstract="The post-inflationary breaking of Peccei-Quinn (PQ) symmetry can lead to the cosmic domain wall catastrophe. In this paper we show how to avoid domain walls by implementing the instanton interference effect with a new interaction which itself breaks PQ symmetry and confines at an energy scale smaller than Lambda(QCD). We give a general description of the mechanism and consider its cosmological implications and constraints within a minimal model. Contrary to other mechanisms, we do not require an inverse phase transition or fine-tuned bias terms. Incidentally, the mechanism leads to the introduction of new self-interacting dark matter candidates and the possibility of producing gravitational waves in the frequency range of SKA. Unless a fine-tuned hidden sector is introduced, the mechanism predicts a QCD axion in the mass range 1-15 meV.",
optnote="WOS:000487735200009",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4152), last updated on Wed, 09 Oct 2019 15:03:05 +0000",
issn="2470-0010",
doi="10.1103/PhysRevD.100.063530",
opturl="https://arxiv.org/abs/1905.13116",
opturl="https://doi.org/10.1103/PhysRevD.100.063530",
language="English"
}