"It was initially assumed that the proton's spin came from the spin of its quarks," says Yasuyuki Akiba, a particle physicist at the RIKEN Brookhaven Research Center (RBRC) and a spokesperson for the ...

The Impact Related Stories One of the main goals of the upcoming Electron-Ion Collider (EIC) is to uncover the origin of proton spin. The EIC will measure the transverse motion of quarks and ...

Worse, the measured quark spin was even compatible with ... measured the production of a particular type of particle, the π 0, in polarized proton collisions, and found quantitatively the same ...

Graphic showing the transverse motion of a quark (green sphere) inside a proton whose spin is aligned to its direction of motion (large yellow arrow). Nuclear theorists at Brookhaven National ...

Their approach uses quantum information science to map out how particle tracks streaming from electron-proton collisions are ... another's state -- for example, their spin direction -- even ...

Chadwick's own research focused on radioactivity. In 1919 Rutherford had discovered the proton, a positively charged particle within the atom's nucleus. But they and other researchers were finding ...

Scientists then use particle detectors such as CLAS and CLAS12 to measure the electron, proton, and nucleon from ... provide valuable insights into the spin structure of nucleons.

To address these problems, the CLAS12 collaboration utilized the Central Neutron Detector, which was developed at France’s ...