Can one vanishing particle shatter string theory — and explain dark matter? Penn physicists and collaborators at Arizona State University "test" the fallibility of a framework that seeks to ...

The other theory explores whether dark matter could be a product of the universe's own expansion, created by quantum radiation near the cosmic horizon during a brief but intense post-inflation phase.

What remains unknown are the origins of dark matter, and hence, what are its particle properties? Those weighty questions primarily fall to theoretical physicists like Profumo.

If dark matter is made from "dark" versions of the basic building blocks of ordinary matter, the world's largest particle accelerator should be able to pin it down, a new study suggests.

The new measurement from LHCb has found differences between baryons and antibaryons, which are made of three quarks and three ...

A new model for dark matter suggests an early universe phase transition and candidate particles known as HYPERs could finally shed light on this mysterious matter.

New theoretical research suggests that a mysterious form of matter called "unparticles" could be the driving force behind the expansion of the universe.

The world’s largest particle-physics laboratory is approaching a pivotal moment in its history.

Both theories offer testable, self-contained frameworks based on known physics, continuing UC Santa Cruz’s legacy of linking particle theory with cosmic-scale phenomena to tackle one of the biggest ...