31. The first non-vanishing case occurs when two gluons have negative helicity. 32. Gluons themselves possess color charge and can mutually interact.33. But physicists have yet to prove conclusively that quarks and gluons can never escape. 34. But they do not understand completely how those quarks and the gluons are arranged. 35. Protons and neutrons are baryons, joined by gluons to form the atomic nucleus. 36. All quarks and gluons in QCD interact with each other through the strong force. 37. However, quark gluon plasmas have been observed. 38. The particle that carries the strong nuclear force is thought to be a gluon . 39. In these, gluons that bind quarks together confer most of the particle mass. 40. It describes particles similar to the gluons of quantum chromodynamics together with certain fermions.
