The greater the cosmic-ray energy, the greater its interaction cross-section, meaning it is more likely to interact with CMB ...

Discover the fascinating world of particle physics — the most fundamental building blocks of the universe and the forces that ...

It aims to restore American primacy in high energy particle physics ... the cosmic microwave background, relic radiation from the Big Bang; and dark matter, the gravitational glue holding galaxies ...

Particle physics dictates that a cosmic ray with energy beyond the GZK cutoff is too powerful for the microwave background to distort its path, but back tracing its trajectory points towards empty ...

Researchers believe this high-energy neutrino could have ... detection of a cosmogenic neutrino, a particle resulting from cosmic rays colliding with background radiation in space.

High-energy neutrinos arise from particle collisions occurring in violent ... between high-energy cosmic rays and the universe's background radiation. Scientists say the study of neutrinos is ...