By a theory of proximity, two deuterons infinitely near each other will interact and create a Helium-4 nucleus plus energy. This is the most ideal cold fusion reaction. However, for them to approach complete physical contact will require the help of other elementary particles, one of the few options is with the assistance of 4W+ and 2W- vector gauge bosons as matter-vacuum displacement.

The decay of neutron into a proton, an electron, and an electron antineutrino is that one of the two down quarks of the neutron changed into an up quark while still preserving color neutrality. If it was a red down then the change is into a red up. If it was a blue down then the change is into a blue up. If it was a green down then the change is into a green up. Experimentally, there is no way to find out for sure which of the colored quarks completed the necessary transformation. However, if W vector gauge bosons are introduced into the interaction then the probability of deuteron-deuteron interaction increases exponentially or at the least linearly and hopefully the rate of reaction is greater than one to one ratio.