Continued

As the quarks move apart, in frames 6 and 7, a color force field develops between them. The energy in the force field increases with the separation of the quarks. When there is sufficient energy in the force field (frame 7), the energy is converted into a quark and an antiquark. This happens because energy and mass are equivalent according to the relation E=mc^2.

In frames 8-10, the quarks separate into distinct, color-neutral particles: the D+ (a c quark and anti-d quark) and D- mesons (an anti-c quark and a d quark).

Other e+ and e- Events Quark Confinement Antimatter

See all ten frames of this picture together.