The universe's matter-antimatter asymmetry, where matter significantly outweighs antimatter despite their theoretically equal creation at the Big Bang, remains a major unsolved problem in physics.

Everything we see around us, from the ground beneath our feet to the most remote galaxies, is made of matter. For scientists, that has long posed a problem: According to physicists’ best current ...

UC Santa Cruz physicist Stefano Profumo has put forward two imaginative but scientifically grounded theories that may help solve one of the biggest mysteries in physics: the origin of dark matter. In ...

Physicists can map its gravity, tally its cosmic abundance, and observe its fingerprints in the microwave glow of the Big Bang. Yet no one has ever detected a single particle of dark matter in the ...

New dark matter model includes lightweight particles with weak interactio Massive vector boson enables connection between dark and known matter Thermal freeze-out explains how dark matter’s cosmic ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. Why didn’t the universe annihilate itself moments ...

An artistic illustration of the mechanism proposed by Professor Stefano Profumo where quantum effects near the rapidly expanding cosmic horizon after the Big Bang gravitationally generate dark matter ...

Scientists propose a bold test of string theory by identifying a hypothetical five-particle family, called a 5-plet, that string theory cannot produce. If such a particle were found at the LHC, it ...

A novel approach to the search for a long theorized fifth force of nature—one that could potentially help scientists unravel lingering mysteries involving the Standard Model of particle physics—is ...

Scientists are on the trail of a mysterious five-particle structure that could challenge one of the biggest theories in physics: string theory. This rare particle—never seen before and predicted not ...

A concept image of particles colliding in the Large Hadron Collider, CERN. Einstein’s theories of relativity successfully explain the behavior of gravity. However, it does not account for the other ...