A Search for Rare Decay D0 --> mu+mu - High Energy Physics UPRM

1.1 The Standard Model 7three “colors” for quarks which are usually called “red”, “blue” and “yellow”. If you puttogether a red quark with an antired antiquark, the product is colorless. If you put together`a red, a blue and a yellow quark, the product is also colorless.Due to the nature of the color interaction, combinations with a net color charge arehighly unstable. If one starts with a system with no net color charge, it will never separateinto color charged pieces. The reason for this is believed to be that, due to the fact thatgluons have a color charge, there is an “anti-screening” effect whereby the effective forcebetween two with distance. This increased potential energy is convertedto quark-antiquark pairs in such a way that the separated pieces are each colorless. Thisis believed to be the reason no system with a net color charge has ever been directlyquarkskl+4g1