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Name: Harold
Status: other
Grade: other
Location: CA
Country: N/A
Date: 9/5/2005

Do neutrinos and antineutrinos annihilate into photons? If so, is there a minimum photon energy observed that suggests a neutrino rest mass?

I imagine they can annihilate, in principle. But it would be very difficult to arrange, maybe impossible. Because we have little or no way to influence neutrinos, we cannot put them into close proximity to get sufficient concentration to see some collide. Knowingly detecting even one annihilation photon is more than we can do. Getting enough of them to plot a spectrum seems like an infeasible way to measure neutrino rest mass. Theories and other experiments are more likely to do the job.

I wonder what is the neutrino situation in a neutron star?

Jim Swenson

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