Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Classifying Matter by State02:49

Classifying Matter by State

103.8K
Chemistry is the study of matter and the changes it undergoes. Matter is anything that has mass and occupies space. Matter is all around us; the air, water, soil, mountains, even our bodies are all examples of matter. Matter is divided into three states — solid, liquid, and gas — that are commonly found on earth. The fourth state of matter, plasma, occurs naturally in the interiors of stars. 
103.8K
X-ray Crystallography02:18

X-ray Crystallography

26.2K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
26.2K
Classifying Matter by Composition03:35

Classifying Matter by Composition

90.6K
Matter: Pure Substances and Mixtures
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures. 
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated. 
A mixture is composed of two or...
90.6K
Physical and Chemical Properties of Matter02:57

Physical and Chemical Properties of Matter

166.6K
The characteristics that enable us to distinguish one substance from another are called properties.
166.6K
The Atomic Theory of Matter02:59

The Atomic Theory of Matter

128.4K
The earliest recorded discussion of the basic structure of matter comes from ancient Greek philosophers. Leucippus and Democritus argued that all matter was composed of small, finite particles that they called atomos, meaning “indivisible.” Later, Aristotle and others came to the conclusion that matter consisted of various combinations of the four “elements” — fire, earth, air, and water — and could be infinitely divided. Interestingly, these philosophers...
128.4K
What is Matter?01:13

What is Matter?

103.1K
The substance of the universe—from a grain of sand to a star—is called matter. Scientists define matter as anything that occupies space and has mass. An object’s mass and its weight are related concepts, but not quite the same. An object’s mass is the amount of matter contained in the object and is the same whether that object is on Earth or in the zero-gravity environment of outer space. An object’s weight, on the other hand, is its mass as affected by the pull of...
103.1K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Ultralight Dark Matter from the Edge of Field Space.

Physical review letters·2026
Same author

Constraints on a Dark Matter Subhalo Near the Sun from Pulsar Timing.

Physical review letters·2026
Same author

The waning of the WIMP: endgame?

The European physical journal. C, Particles and fields·2025
Same author

Thermal Axion Production at Low Temperatures: A Smooth Treatment of the QCD Phase Transition.

Physical review letters·2022
Same author

Direct Detection of Hawking Radiation from Asteroid-Mass Primordial Black Holes.

Physical review letters·2021
Same author

The waning of the WIMP? A review of models, searches, and constraints.

The European physical journal. C, Particles and fields·2019

Related Experiment Video

Updated: Feb 5, 2026

Quantifying X-Ray Fluorescence Data Using MAPS
14:58

Quantifying X-Ray Fluorescence Data Using MAPS

Published on: February 17, 2018

11.3K

Sub-GeV Dark Matter Shining at Future MeV γ-Ray Telescopes.

Francesco D'Eramo1,2, Stefano Profumo3,4

  • 1Dipartimento di Fisica ed Astronomia, Università di Padova, Via Marzolo 8, 35131 Padova, Italy.

Physical Review Letters
|September 1, 2018
PubMed
Summary

We propose a novel framework for detecting light dark matter (DM) using MeV gamma-ray telescopes. This approach avoids conflicts with cosmic microwave background data by utilizing a metastable DM partner for relic abundance generation.

More Related Videos

Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis
06:56

Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis

Published on: September 22, 2023

1.7K
Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
10:39

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

10.1K

Related Experiment Videos

Last Updated: Feb 5, 2026

Quantifying X-Ray Fluorescence Data Using MAPS
14:58

Quantifying X-Ray Fluorescence Data Using MAPS

Published on: February 17, 2018

11.3K
Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis
06:56

Author Spotlight: Advancements in X-ray CT Tool Chain for Tree Core Analysis

Published on: September 22, 2023

1.7K
Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
10:39

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

10.1K

Area of Science:

  • Particle Physics
  • Cosmology
  • Astrophysics

Background:

  • Current dark matter (DM) models face challenges in detection and cosmological consistency.
  • Light (sub-GeV) dark matter candidates are particularly difficult to detect with existing experimental sensitivities.
  • Cosmic Microwave Background (CMB) data places stringent constraints on early Universe physics, limiting DM properties.

Purpose of the Study:

  • To propose a novel framework for detecting light dark matter (DM) with future MeV gamma-ray telescopes.
  • To ensure the proposed DM model is consistent with CMB data and other cosmological observations.
  • To provide model-independent realizations and explore parameter constraints within this framework.

Main Methods:

  • Introducing a stable DM particle (χ) with a high annihilation cross-section, leading to low thermal relic abundance.
  • Utilizing a heavier, metastable partner particle (ψ) with suppressed annihilation rates to store DM number density.
  • Implementing late-time decays of the partner particle (ψ→χ) to populate the Universe with DM.
  • Analyzing constraints from CMB, Big Bang Nucleosynthesis (BBN), and Large Scale Structure (LSS) on the model parameters.

Main Results:

  • Demonstrated a viable mechanism for producing light DM without perturbing the CMB.
  • Established that the DM relic abundance can be generated through late-time decays of a heavier partner.
  • Identified specific model-independent realizations of this framework.
  • Derived constraints on the parameters governing the late-time decays from cosmological data.

Conclusions:

  • The proposed framework offers a promising avenue for detecting light dark matter with MeV gamma-ray telescopes.
  • The model successfully reconciles light DM with stringent CMB constraints.
  • Future cosmological observations can further refine the parameter space of this dark matter scenario.