call me greg

First of all, in beta decay (+ or -) I know it emites an electron/positron and an electron antineutrino/neutrino, however I noticed on some A-level work one of the bosons was involved with the beta decay, I was wondering what role it plays in the decay process... Also my physics teacher said "beta+ decay doesn't occur in nature", and I questioned that thinking about what happens in the sun when two protons fuse and will surely undergo beta+ decay to create deuterium (which would then allow a proton to fuse to make helium-3, or deuterium to make helium-4), I'm sure I'm right in thinking his statement needs reworking?

Well? What?