I believe I understand the basics of some fields, but I am unsure about the correctness of all of my knowledge. - All particles are excitations of their field (If it's a fermion) and the field they mediate (If it's a boson) - Electron repulsion is created by the exhcnage of virtual photons that exist for short time periods. - Strong nuclear force is solely based on the exhcnage of muons between hadrons and gluons between quarks. - Weak nuclear force is esentially beta decay and the boson of it is the -W boson emitted from the decaying up quark in a proton, which then may decay into an antineutrino and electron. - The Higgs field gives fermions their mass, although my understanding is as basic as the cocktail party analogy. - Particles can "borrow" energy from the uncertainty principle, although my understanding is quite limited. - Electron-Positron pairs can appear out of nowhere in a vaccuum and this is the cuase of the Casimir effect. My questions are: Why does strong nuclear force ignore leptons? Why does the Higgs field ignore the Photon and neutrino? Why does the whole "Zero Point Field" energy thing happen with the electron-positron pairs appearing and then annhilating? And why do particles attract, I believe I understand how they repel, but can anybody explain the attraction?