Thanks to a new development in nuclear physics theory, scientists exploring expanding fireballs that mimic the early universe have new signs to look for as they map out the transition from primordial ...

Physicists have announced the discovery of a new type of pentaquark 1. Most ordinary matter is made up of three-quark particles —protons and neutrons. The five-particle pentaquarks and their ...

University of Chicago scientists have solved a 20-year-old puzzle in particle physics using data from an experiment conducted for an entirely different purpose. Physicists had long known that ...

Researchers at CERN have announced a new particle that is like a slightly heavier version of the proton. This new particle, reported by the LHCb experiment, has two charm quarks and one down quark, ...

Experimental physicists study the strong force; string theorists try to calculate its effects. Together, they are finding common ground, where string theory can be applied to the physics of ...