universe exists because the fundamental particles interact
by decaying, annihilating, or responding to a force due to another particle

The force carrier for the strong interaction is the electrically neutral, color-charged gluon.

Force carriers for the weak interaction:

the W+ (electrically positive) W- (electrically negative) and the Z (no electric charge) weak force carrier particles are not color charged. weak force-carrier particles (W±) mediate decays in which particles change electric charge. happens when a particle changes flavor strong force carrier particle (gluon) mediates decay involving a color change strong interactions happen faster than weak interactions.