Two independent studies have illuminated unexpected substructures in the fundamental components of all matter. Preliminary results using a novel tagging method could explain the origin of the ...

Combinations of three quarks (RGB) or three antiquarks (CMY) are colorless, as are appropriate combinations of quark/antiquark pairs. The gluon exchanges that keep these entities stable are quite ...

Protons and neutrons, which are collectively known as nucleons, are the building blocks of atomic nuclei and account for more than 99% of the visible matter in the Universe. They are not themselves ...

LOS ALAMOS, N.M., February 24, 2021--A complex high-energy nuclear physics experiment, aiming to measure the contributions of antiquarks to the structure of the proton and neutron, has produced ...

Like a quantum version of a whirling top, protons have angular momentum, known as spin. But the source of the subatomic particles’ spin has confounded physicists. Now scientists have confirmed that ...

It often goes unmentioned that protons, the positively charged matter particles at the center of atoms, are part antimatter. We learn in school that a proton is a bundle of three elementary particles ...

Physicists at accelerators in Japan and the United States have detected a subatomic particle that may be unlike any seen before. Some evidence suggests that the particle contains two pairs of more ...

Seemingly empty vacuums are actually teeming with perturbations known as virtual particles that are nearly impossible to detect. Virtual particles vanish quickly, but by smashing protons at ...