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Updated: Jul 26, 2026

Setting Limits on Supersymmetry Using Simplified Models

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Published on: November 15, 2013

Fuzzy Dark Matter from Infrared Confining Dynamics.

Hooman Davoudiasl¹, Christopher W Murphy¹

¹Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, USA.

Physical Review Letters

|April 22, 2017

Summary

A new fuzzy dark matter model proposes a very light boson as a dark matter candidate. This model offers a novel explanation for dark matter properties and predicts testable cosmological signatures.

Area of Science:

Cosmology
Particle Physics
Astrophysics

Background:

Dark matter (DM) candidates face phenomenological challenges.
A very light boson (O(10^{-22}) eV) is a potential dark matter candidate, termed fuzzy DM (FDM).
FDM could be an axion with specific decay constants and masses.

Purpose of the Study:

Propose a concrete model for fuzzy dark matter (FDM).
Explain the dynamical origin of the mass scale (μ) from infrared confining dynamics, analogous to QCD.
Offer an alternative to string theoretic instanton effects for generating μ.

Main Methods:

Develop a theoretical model for FDM based on dynamical scales.
Analyze cosmological constraints on the proposed FDM scenario.

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Last Updated: Jul 26, 2026

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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

Investigate implications for early universe cosmology, including inflation and reheating.

Main Results:

Cosmological constraints suggest a period of mild inflation, possibly from a strong first-order phase transition.
The model predicts reheating of the standard model (SM) sector only.
A key prediction is a larger effective number of neutrinos (N_{eff}) than the SM value.

Conclusions:

The proposed FDM model offers a viable alternative to existing dark matter candidates.
The scenario predicts observable signatures such as an increased N_{eff}, potentially linked to sterile neutrinos.
Aspects of this FDM model may be testable in terrestrial experiments, offering novel avenues for verification.