Quark-gluon plasma (QGP) is a state of matter existing at extremely temperatures and densities, such as those that occur in collisions of hadrons (protons, neutrons and mesons). Under so-called ...

Protons can hold an elementary particle heavier than themselves. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Protons may have more "charm" ...

Physicists from the four experimental collaborations collecting data at the Relativistic Heavy Ion Collider (RHIC) -- the world's largest facility for nuclear physics research, located at the U.S.