My minimal knowledge of matter/animatter interaction is that only light is released and they obliviate each other. is this the same for neutrinos?


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.

  • 1
    $\begingroup$ "scarcely abundant" that bit isn't quite right. On earth the neutrino flux, just from our sun, is about 65billion per square centimeter per second (on a surface with normal towards the sun). Even intergalactic space is believed to have quite a high density. $\endgroup$
    – R. Rankin
    May 19 at 2:04
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    $\begingroup$ Neutrinos are neutral, they don't couple to the EM force. $\endgroup$
    – Triatticus
    May 19 at 2:21
  • $\begingroup$ @Triatticus photons are neutral $\endgroup$
    – Señor O
    May 19 at 2:26
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    $\begingroup$ @SeñorO which is why EM is linear: photons don't couple to photons. $\endgroup$
    – JEB
    May 19 at 3:21
  • $\begingroup$ There are vast numbers of neutrinos (& antineutrinos) in the cosmic neutrino background, a relic from the Big Bang, but due to their extremely low energy, they barely interact with anything. $\endgroup$
    – PM 2Ring
    May 20 at 20:45

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