skip to main content

DOE PAGESDOE PAGES

Title: QCD Axion Dark Matter with a Small Decay Constant

The QCD axion is a good dark matter candidate. The observed dark matter abundance can arise from misalignment or defect mechanisms, which generically require an axion decay constant f a ~ O(10 11) GeV (or higher). We introduce a new cosmological origin for axion dark matter, parametric resonance from oscillations of the Peccei-Quinn symmetry breaking field, that requires f a ~ (10 8–10 11) GeV. The axions may be warm enough to give deviations from cold dark matter in large scale structure.
Authors:
 [1] ;  [2] ;  [2]
  1. Univ. of Michigan, Ann Arbor, MI (United States); Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Published Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 21; Related Information: © 2018 authors. Published by the American Physical Society.; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1438516
Alternate Identifier(s):
OSTI ID: 1461154

Co, Raymond T., Hall, Lawrence J., and Harigaya, Keisuke. QCD Axion Dark Matter with a Small Decay Constant. United States: N. p., Web. doi:10.1103/PhysRevLett.120.211602.
Co, Raymond T., Hall, Lawrence J., & Harigaya, Keisuke. QCD Axion Dark Matter with a Small Decay Constant. United States. doi:10.1103/PhysRevLett.120.211602.
Co, Raymond T., Hall, Lawrence J., and Harigaya, Keisuke. 2018. "QCD Axion Dark Matter with a Small Decay Constant". United States. doi:10.1103/PhysRevLett.120.211602.
@article{osti_1438516,
title = {QCD Axion Dark Matter with a Small Decay Constant},
author = {Co, Raymond T. and Hall, Lawrence J. and Harigaya, Keisuke},
abstractNote = {The QCD axion is a good dark matter candidate. The observed dark matter abundance can arise from misalignment or defect mechanisms, which generically require an axion decay constant fa ~ O(1011) GeV (or higher). We introduce a new cosmological origin for axion dark matter, parametric resonance from oscillations of the Peccei-Quinn symmetry breaking field, that requires fa ~ (108–1011) GeV. The axions may be warm enough to give deviations from cold dark matter in large scale structure.},
doi = {10.1103/PhysRevLett.120.211602},
journal = {Physical Review Letters},
number = 21,
volume = 120,
place = {United States},
year = {2018},
month = {5}
}