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

Detection of Black Holes01:10

Detection of Black Holes

2.6K
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
2.6K
Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

4.9K
In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of...
4.9K
Schwarzschild Radius and Event Horizon01:21

Schwarzschild Radius and Event Horizon

2.9K
No object with a finite mass can travel faster than the speed of light in a vacuum. This fact has an interesting consequence in the domain of extremely high gravitational fields.
The minimum speed required to launch a projectile from the surface of an object to which it is gravitationally bound so that it eventually escapes the object’s gravitational field is called the escape velocity. The escape velocity is independent of the mass of the object. Merging the idea of escape...
2.9K
Gravitation Between Spherically Symmetric Masses01:14

Gravitation Between Spherically Symmetric Masses

1.5K
The gravitational potential energy between two spherically symmetric bodies can be calculated from the masses and the distance between the bodies, assuming that the center of mass is concentrated at the respective centers of the bodies.
1.5K
Gravity between Spherical Bodies01:27

Gravity between Spherical Bodies

9.7K
Newton's law of gravitation describes the gravitational force between any two point masses. However, for extended spherical objects like the Earth, the Moon, and other planets, the law holds with an assumption that masses of spherical objects are concentrated at their respective centers.
This assumption can be proved easily by showing that the expression for gravitational potential energy between a hollow sphere of mass (M) and a point mass (m) is the same as it would be for a pair of extended...
9.7K
Newton's Law of Gravitation01:15

Newton's Law of Gravitation

17.6K
Our everyday observation tells us that all objects close to the Earth naturally tend to fall to the ground. Early philosophers assumed that this downward force was unique to Earth. By the 16th century, Nicolaus Copernicus (1473-1543) put forward the heliocentric theory, which suggested that Earth and other planets orbited the sun, while the Moon orbited the Earth. However, it was Isaac Newton (1642-1727) who linked these two motions together in the 17th century. He reasoned that the force of...
17.6K

You might also read

Related Articles

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

Sort by
Same author

Asymmetric bending boundary layer: The <i>λ</i>-test.

Proceedings of the National Academy of Sciences of the United States of America·2025
Same author

Designing a Contact Fingertip Sensor Made Using a Soft 3D Printing Technique.

Soft robotics·2022
Same author

Long-lived particles at the energy frontier: the MATHUSLA physics case.

Reports on progress in physics. Physical Society (Great Britain)·2019
Same author

Neutrino Masses from Planck-Scale Lepton Number Breaking.

Physical review letters·2019
Same author

Optimal propulsion of an undulating slender body with anisotropic friction.

Soft matter·2017
Same author

Helical Locomotion in a Granular Medium.

Physical review letters·2017

Related Experiment Video

Updated: Mar 17, 2026

Setting Limits on Supersymmetry Using Simplified Models
07:46

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

9.0K

Dark Matter Decays from Nonminimal Coupling to Gravity.

Oscar Catà1, Alejandro Ibarra2, Sebastian Ingenhütt2

  • 1Ludwig-Maximilians-Universität München, Fakultät für Physik, Arnold Sommerfeld Center for Theoretical Physics, 80333 München, Germany.

Physical Review Letters
|July 23, 2016
PubMed
Summary

Dark matter particles may decay in curved spacetime through a "gravity portal," even with only gravitational interactions. Decay rates depend on dark matter mass, with stringent limits found for singlet scalar candidates.

More Related Videos

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

9.1K
Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
10:16

Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects

Published on: February 8, 2014

12.7K

Related Experiment Videos

Last Updated: Mar 17, 2026

Setting Limits on Supersymmetry Using Simplified Models
07:46

Setting Limits on Supersymmetry Using Simplified Models

Published on: November 15, 2013

9.0K
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

9.1K
Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
10:16

Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects

Published on: February 8, 2014

12.7K

Area of Science:

  • Particle Physics
  • Cosmology
  • Astrophysics

Background:

  • Dark matter evidence is primarily gravitational.
  • Standard Model extensions include dark matter candidates.
  • Spacetime curvature effects on particle stability are under-explored.

Purpose of the Study:

  • Investigate dark matter stability in curved spacetime.
  • Analyze the impact of gravity-portal interactions.
  • Determine decay mechanisms and branching ratios for dark matter.

Main Methods:

  • Considered standard model with dark matter in curved spacetime.
  • Analyzed Lagrangian terms linear in dark matter and proportional to Ricci scalar.
  • Calculated decay widths for a singlet scalar dark matter candidate.

Main Results:

  • A 'gravity portal' induces dark matter decay even with only gravitational interactions.
  • Decay branching ratios depend solely on dark matter mass.
  • Stringent experimental limits were set on the nonminimal coupling parameter for singlet scalars.

Conclusions:

  • Curved spacetime can destabilize dark matter particles.
  • The singlet scalar dark matter model requires additional protection mechanisms.
  • Experimental constraints suggest new physics beyond the minimal gravity-portal interaction.