Decay of ultralight axion condensates
Abstract
Axion particles can form macroscopic condensates, whose size can be galactic in scale for models with very small axion masses $$m\sim10^{-22}$$ eV, and which are sometimes referred to under the name of Fuzzy Dark Matter. Many analyses of these condensates are done in the non-interacting limit, due to the weakness of the self-interaction coupling of axions. We investigate here how certain results change upon inclusion of these interactions, finding a decreased maximum mass and a modified mass-radius relationship. Further, these condensates are, in general, unstable to decay through number-changing interactions. We analyze the stability of galaxy-sized condensates of axion-like particles, and sketch the parameter space of stable configurations as a function of a binding energy parameter. As a result, we find a strong lower bound on the size of Fuzzy Dark Matter condensates which are stable to decay, with lifetimes longer than the age of the universe.
- Authors:
-
[1];
- Univ. of Cincinnati, Cincinnati, OH (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Univ. of Cincinnati, Cincinnati, OH (United States)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1358097
- Report Number(s):
- arXiv:1705.05385; FERMILAB-PUB-17-170-T
Journal ID: ISSN 1029-8479; 1599792
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 1; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Classical Theories of Gravity; Cosmology of Theories beyond the SM
Citation Formats
Eby, Joshua, Ma, Michael, Suranyi, Peter, and Wijewardhana, L. C. R. Decay of ultralight axion condensates. United States: N. p., 2018.
Web. doi:10.1007/JHEP01(2018)066.
Eby, Joshua, Ma, Michael, Suranyi, Peter, & Wijewardhana, L. C. R. Decay of ultralight axion condensates. United States. https://doi.org/10.1007/JHEP01(2018)066
Eby, Joshua, Ma, Michael, Suranyi, Peter, and Wijewardhana, L. C. R. Mon .
"Decay of ultralight axion condensates". United States. https://doi.org/10.1007/JHEP01(2018)066. https://www.osti.gov/servlets/purl/1358097.
@article{osti_1358097,
title = {Decay of ultralight axion condensates},
author = {Eby, Joshua and Ma, Michael and Suranyi, Peter and Wijewardhana, L. C. R.},
abstractNote = {Axion particles can form macroscopic condensates, whose size can be galactic in scale for models with very small axion masses $m\sim10^{-22}$ eV, and which are sometimes referred to under the name of Fuzzy Dark Matter. Many analyses of these condensates are done in the non-interacting limit, due to the weakness of the self-interaction coupling of axions. We investigate here how certain results change upon inclusion of these interactions, finding a decreased maximum mass and a modified mass-radius relationship. Further, these condensates are, in general, unstable to decay through number-changing interactions. We analyze the stability of galaxy-sized condensates of axion-like particles, and sketch the parameter space of stable configurations as a function of a binding energy parameter. As a result, we find a strong lower bound on the size of Fuzzy Dark Matter condensates which are stable to decay, with lifetimes longer than the age of the universe.},
doi = {10.1007/JHEP01(2018)066},
journal = {Journal of High Energy Physics (Online)},
number = 1,
volume = 2018,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2018},
month = {Mon Jan 15 00:00:00 EST 2018}
}
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Works referencing / citing this record:
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