If we have a beta decay where a solar neutrino is produced: a proton converts into a neutron ,emitting a W. the W decays into an anti electron and a neutrino. So in the end of the chain we have a neutrino that will travel through space and oscillate. Neutrino Oscillation happens because of Neutrino mixing. but what is the difference between them? and how neutrino mixing happens exactly here? Is the neutrino required to emit a W Boson like quarks do? I'm new to the concept of Neutrinos, I'm really trying to understand how neutrino mixing happens.