Strong Interaction  


quarks and gluons have charge that's not electric

same mathematics as color, so "color" charge

force between color-charged particles very strong
holds quarks together to form protons, neutrons, etc.
carrier particles called gluons

only quarks and gluons have color charge
protons and neutrons are color neutral, as leptons
strong force only acts at really small distances

electric charge vector:    (+  o  -)       3 basic values
3 x 3 color charge matrix:
   (9 combinations - 1 constraint) =  8 basic values

    red   green   blue 
 anti-red r r gr b r
 anti-green r g g g b g
 anti-blue rb g b b b

Note: Italic letters are anti-particles