-----Original Message----- From: mix...@bigpond.com
> What makes you think it would require several MeV? Last I saw, they were having trouble proving that the neutrino had any mass at all, let alone several MeV. What you must be referring to is rest mass; but like a photon, neutrinos always move very close to the speed of light. When a neutron decays, on rare occasion, the proton and electron stay bound, and the electron anti-neutrino carries away all the energy which is ~.78 MeV. This is generally assumed to represent the upper limit of mass-energy of the electron anti-neutrino. It is reasonable to assume if pair production is involved it would be require over 1.5 MeV. Of course, the next little problem is that there is no evidence at all for neutrino pair production, ergo ... another putative miracle is required. Jones
