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Title: Fuzzy Dark Matter from Infrared Confining Dynamics

A very light boson of mass O ( 10 - 22 ) eV may potentially be a viable dark matter (DM) candidate, which can avoid phenomenological problems associated with cold DM. Such “fuzzy DM (FDM)” may naturally be an axion with a decay constant f a ~ 1 0 16 – 1 0 18 GeV and a mass m a ~ μ 2 / f a with μ ~ 1 0 2 eV . Here, we propose a concrete model, where μ arises as a dynamical scale from infrared confining dynamics, analogous to QCD. This model is an alternative to the usual approach of generating μ through string theoretic instanton effects. We outline the features of this scenario that result from various cosmological constraints. We also found that those constraints are suggestive of a period of mild of inflation, perhaps from a strong first order phase transition, that reheats the standard model (SM) sector only. A typical prediction of our scenario, broadly speaking, is a larger effective number of neutrinos compared to the SM value N eff ≈ 3 , as inferred from precision measurements of the cosmic microwave background. Some of the new degrees of freedom may be identifiedmore » as “sterile neutrinos,” which may be required to explain certain neutrino oscillation anomalies. Thus, aspects of our scenario could be testable in terrestrial experiments, which is a novelty of our FDM model.« less
Authors:
 [1] ;  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
Publication Date:
Report Number(s):
BNL-114133-2017-JA
Journal ID: ISSN 0031-9007; PRLTAO; KA2401012; TRN: US1702811
Grant/Contract Number:
SC00112704; SC0012704
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 118; Journal Issue: 14; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (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; dark matter; HET; standard model; GeV; infrared; quantum chromodynamics; neutrinos; particle mixing; oscillations; anomalies
OSTI Identifier:
1377019
Alternate Identifier(s):
OSTI ID: 1349705

Davoudiasl, Hooman, and Murphy, Christopher W. Fuzzy Dark Matter from Infrared Confining Dynamics. United States: N. p., Web. doi:10.1103/PhysRevLett.118.141801.
Davoudiasl, Hooman, & Murphy, Christopher W. Fuzzy Dark Matter from Infrared Confining Dynamics. United States. doi:10.1103/PhysRevLett.118.141801.
Davoudiasl, Hooman, and Murphy, Christopher W. 2017. "Fuzzy Dark Matter from Infrared Confining Dynamics". United States. doi:10.1103/PhysRevLett.118.141801. https://www.osti.gov/servlets/purl/1377019.
@article{osti_1377019,
title = {Fuzzy Dark Matter from Infrared Confining Dynamics},
author = {Davoudiasl, Hooman and Murphy, Christopher W.},
abstractNote = {A very light boson of mass O ( 10 - 22 ) eV may potentially be a viable dark matter (DM) candidate, which can avoid phenomenological problems associated with cold DM. Such “fuzzy DM (FDM)” may naturally be an axion with a decay constant f a ~ 1 0 16 – 1 0 18 GeV and a mass m a ~ μ 2 / f a with μ ~ 1 0 2 eV . Here, we propose a concrete model, where μ arises as a dynamical scale from infrared confining dynamics, analogous to QCD. This model is an alternative to the usual approach of generating μ through string theoretic instanton effects. We outline the features of this scenario that result from various cosmological constraints. We also found that those constraints are suggestive of a period of mild of inflation, perhaps from a strong first order phase transition, that reheats the standard model (SM) sector only. A typical prediction of our scenario, broadly speaking, is a larger effective number of neutrinos compared to the SM value N eff ≈ 3 , as inferred from precision measurements of the cosmic microwave background. Some of the new degrees of freedom may be identified as “sterile neutrinos,” which may be required to explain certain neutrino oscillation anomalies. Thus, aspects of our scenario could be testable in terrestrial experiments, which is a novelty of our FDM model.},
doi = {10.1103/PhysRevLett.118.141801},
journal = {Physical Review Letters},
number = 14,
volume = 118,
place = {United States},
year = {2017},
month = {4}
}