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Title: Fuzzy Dark Matter from Infrared Confining Dynamics

Journal Article · · Physical Review Letters
 [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics

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.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC00112704; SC0012704
OSTI ID:
1377019
Alternate ID(s):
OSTI ID: 1349705
Report Number(s):
BNL-114133-2017-JA; PRLTAO; KA2401012; TRN: US1702811
Journal Information:
Physical Review Letters, Vol. 118, Issue 14; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (8)

Looking for ultralight dark matter near supermassive black holes journal July 2019
Using the full power of the cosmic microwave background to probe axion dark matter journal February 2018
Cosmological perturbations of extreme axion in the radiation era journal September 2017
Mononeutrino at DUNE: New signals from neutrinophilic thermal dark matter journal March 2019
Light axion-like dark matter must be present during inflation text January 2017
Cosmological Perturbations of Extreme Axion in the Radiation Era text January 2017
Fuzzy Dark Matter and Non-Standard Neutrino Interactions text January 2017
Mono-Neutrino at DUNE: New Signals From Neutrinophilic Thermal Dark Matter text January 2019

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