My minimal knowledge of matter/animatter interaction is that only light is released and they obliviate each other. is this the same for neutrinos?
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Matter-antimatter annihilations don't need to only turn into "light" (or more precisely "photons"), however that is what happens with electron/positron annihilation which is to my knowledge the most common antimatter interaction in the real world.
Neutrino-antineutrino annihilation is extremely rare because they're both scarcely interactive and scarcely abundant. Since the neutrino is coupled to the weak force and the EM force, I believe that neutrino-antineutrino annhiliation can produce photons or Z bosons/mesons (all with varying probabilities). Incidentally, anything that can decay into a antineutrino-neutrino pair (which a photon I believe) can be a product of their annihilation, as QFT is reversible. My certainty on this is not 100% so I'm happy to be corrected by someone better versed in the specifics.
Señor O
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