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How much energy is lost due to neutrinos in matter-antimatter reaction ?

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  1. Jan 20, 2013 #1
    I read that matter-antimatter annihilation is not as useful as we thought because a large amount of energy is carried away by neutrinos. So, how much is this energy ? What is the percentage of the lost energy to the energy calculated from E=mc^2 ?
     
  2. jcsd
  3. Jan 20, 2013 #2

    mfb

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    We had this discussion a while ago here. It depends on the setup, but the fraction is significant for the annihilation of nucleons.
    Electron-positron annihilation gives (nearly always) photons, so there are no losses involved.
     
  4. Jan 20, 2013 #3
    After reading every single post, I still don't have a conclusion.
    I just need a rough percentage. Would saying 50% be wrong ?
     
  5. Jan 20, 2013 #4

    mfb

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    It is the correct order of magnitude :). Something between 20% and 80%.
     
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