Browse Physics

A model in which the dark matter relic density was inherited from the lepton asymmetry in the early universe can result in lepton-favoring dark matter annihilations today, which may explain recent anomalous cosmic-ray positron observations.

Cascades created by cosmic rays interacting with the atmosphere provide clues about the mass composition of ultrahigh-energy cosmic rays.

New data are inconsistent with previous measurements that showed an unexpected excess of diffuse gamma-ray emission in the Galaxy.

Simulations support the prediction that when nuclei are squeezed to high densities in the core of a supernova, they merge into exotic shapes such as rods and slabs.

The Moon might be stranger than we think.

Detectors buried beneath the Antarctic ice place stringent limits on the presence of dark matter particles, called neutralinos, in the sun.