Why Neutrino Lines are Hypersharp

Details Why Neutrino Lines are Hypersharp Why Neutrino Lines are Hypersharp

2009-08-20

arxiv.org/abs/0908.2980v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Corrected citation for ref. 10

Scientific paper

It was recently pointed out that mono-energetic neutrino lines from the 2-body decay of tritium (tau ~ 18-y) can be emitted, a significant fraction, with natural line width (~10-24 eV) for hypersharp resonance transitions 3H--> <--3He. The very long lifetime typical of a neutrino transition, encountered for the first time in resonance, is the key to this surprising effect which is not intuitive from perspectives of line broadening in resonances of short lived (tau ~ microsec) states.

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