The particles that are in an atom: protons, neutrons and electrons The particles that are in protons and neutrons: quarks The four fundamental forces: gravity, electromagnetism, the strong force and ...

No one has ever probed a particle more stringently than this. In a new experiment, scientists measured a magnetic property of the electron more carefully than ever before, making the most precise ...

The muon’s mysteries continue to leave physicists spellbound. Last year, an experiment suggested that the elementary particle had inexplicably strong magnetism, possibly breaking a decades-long streak ...

A collaboration of hundreds of scientists have precisely measured the mass of the W boson, an elementary particle responsible for the weak nuclear force. The researchers found, to their surprise, that ...

THE STANDARD MODEL of particle physics—completed in 1973—is the jewel in the crown of modern physics. It predicts the properties of elementary particles and forces with mind-boggling accuracy. Take ...

An experiment deep underground hopes to explain the gallium anomaly. The gallium anomaly dates back 20 years to a confusing experimental finding. The answer could represent a fundamental shift, or it ...