A new look at proton (atom)

Figure 1: The HERMES experiment (HERA measurement of spin). This photo shows that the entire experiment is mounted on rails and can be moved out of the ring of the particle accelerator (HERA). At the bottom left of the photo a piece of tube from the accelerator can be seen through which the electrons move (to the right

Paul van der Nat, Dutch researcher- for the first time was successful to demonstrate that the spin contribution of quarks to the proton can be studied by examining collisions in which two particles (hadrons) are produced.

Quarks can't stand or found alone, it's only exist in group with other quarks. Composite particles made of quarks are called hadrons. Although individual quarks have fractional electrical charges, they combine such that hadrons have a net integer electric charge. Another property of hadrons is that they have no net color charge even though the quarks themselves carry color charge and there are two classes of hadron, baryons and mesons.

To know more about particles, click here.