🚀 go-pugleaf

David Brahm wrote the following:

If you give the neutrino a Majorana mass (as is done in the usual see-saw
mechanism), then when you overtake the light left-handed neutrino you will
see a light right-handed antineutrino!  The see-saw theory also contains a
heavy right-handed neutrino and its antiparticle, a heavy left-handed
antineutrino, but these do not appear in your "experiment".

The trick here is that Majorana masses violate any quantum number which the
particle carries (here, e.g., lepton number), so "particle" and
"antiparticle" are not as well-distinguished as we normally imagine.  If
the electron had a Majorana mass (instead of a Dirac mass), lepton number
and electric charge would be violated.

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      Now THAT gives rise to something else,David. What would I see if the
same neutrino was AT REST in my frame? Would I see a heavy neutrino ? A light
one? What about its chirality?. At what point in the experiment does the switch 
from left- to right-neutrino occur? Or is it that here too, the ubiquitous
Uncertainty rule comes to the rescue, saying you're not allowed to do this (very
loosely speaking :-)  )?

------ Vijay

Don't blame me for being dumb. It was God's mistake.