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Title: QCD axion dark matter from long-lived domain walls during matter domination

Abstract

The domain wall problem of the Peccei–Quinn mechanism can be solved if the Peccei–Quinn symmetry is explicitly broken by a small amount. Domain walls decay into axions, which may account for dark matter of the universe. This scheme is however strongly constrained by overproduction of axions unless the phase of the explicit breaking term is tuned. We investigate the case where the universe is matter-dominated around the temperature of the MeV scale and domain walls decay during this matter dominated epoch. Here, we show how the viable parameter space is expanded.

Authors:
 [1];  [2]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Theoretical Physics Group
  2. Univ. of Tokyo, Kashiwa (Japan). Inst. for Cosmic Ray Research (ICRR), and Kavli Inst. for the Physics and Mathematics of the Universe (IPMU)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); National Science Foundation (NSF); Japan Society for the Promotion of Science (JSPS); MEXT, Japan
OSTI Identifier:
1437873
Alternate Identifier(s):
OSTI ID: 1493672
Grant/Contract Number:  
AC02-05CH11231; PHY-1316783; PHY-1521446; 17H01131; 17K05434; 15H05889
Resource Type:
Journal Article: Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 782; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Harigaya, Keisuke, and Kawasaki, Masahiro. QCD axion dark matter from long-lived domain walls during matter domination. United States: N. p., 2018. Web. doi:10.1016/j.physletb.2018.04.056.
Harigaya, Keisuke, & Kawasaki, Masahiro. QCD axion dark matter from long-lived domain walls during matter domination. United States. doi:10.1016/j.physletb.2018.04.056.
Harigaya, Keisuke, and Kawasaki, Masahiro. Sat . "QCD axion dark matter from long-lived domain walls during matter domination". United States. doi:10.1016/j.physletb.2018.04.056.
@article{osti_1437873,
title = {QCD axion dark matter from long-lived domain walls during matter domination},
author = {Harigaya, Keisuke and Kawasaki, Masahiro},
abstractNote = {The domain wall problem of the Peccei–Quinn mechanism can be solved if the Peccei–Quinn symmetry is explicitly broken by a small amount. Domain walls decay into axions, which may account for dark matter of the universe. This scheme is however strongly constrained by overproduction of axions unless the phase of the explicit breaking term is tuned. We investigate the case where the universe is matter-dominated around the temperature of the MeV scale and domain walls decay during this matter dominated epoch. Here, we show how the viable parameter space is expanded.},
doi = {10.1016/j.physletb.2018.04.056},
journal = {Physics Letters. Section B},
issn = {0370-2693},
number = C,
volume = 782,
place = {United States},
year = {2018},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.physletb.2018.04.056

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