I would still like somebody to prove the existence of W and Z bosons - with a lifetime of (from memory) 10-25 seconds they have never been directly detected,
These particles are just virtual as the natural rule is that a particle must last longer than lights need to travel i's De-Broglie wave length. Of course not given by the classic formula that neglects the space metric of the wave manifold and also full 2pi length...
So the QCD particle model is just a rotten mind fantasy...