Astronomers have long been puzzled by two strange phenomena at the heart of our galaxy. First, the gas in the central ...

The Standard Model is a kind of periodic table of the elements for particle physics. But instead of listing the chemical elements, it lists the fundamental particles that make up the atoms that make ...

It describes the forces and behavior of the Universe’s fundamental particles: quarks, leptons, and bosons. It is a very ...

Note: For a definition of unfamiliar terms, see our glossary. The fundamental particles of the universe that physicists have identified—electrons, neutrinos, quarks, and so on—are the "letters ...

The fundamental particles are summarised by the standard model. This includes leptons (such as the electron), the quarks that make up protons and neutrons, and gauge bosons, which mediate forces ...

are subject to a mirror-like asymmetry in nature's fundamental laws that causes matter and antimatter to behave differently. First observed in the 1960s among a class of particles called mesons ...