By analyzing the highest-energy proton collisions at the Relativistic Heavy Ion Collider (RHIC),a particle collider at the U.
S. Department of Energy's (DOE) Brookhaven National Laboratory, nuclear physicists absorb gotten a glimpse of how a multitude of gluons that individually carry very little of the protons' overall momentum contribute to the protons' spin. The data described in a recently published paper indicate that these glue-like particles—named for their role in binding the quarks that originate up each proton—play a substantial role in determining the intrinsic angular momentum, or spin,of these building blocks of matter.
Source: phys.org