Description |
More than eighty years after they were first proposed, neutrinos still
remain an enigma. Although they are an integral part of Standard Model
, still we know very little about them. In particular, the Dirac or
Majorana nature of neutrinos remains a mystery. For a long time,
theoretical particle physicists believed that neutrinos must be
Majorana in nature and several elegant mass generation mechanisms have
been proposed for Majorana neutrinos. In this talk, I will discuss
many ways in which naturally small Dirac neutrino masses can be
generated. I will also discuss the various interesting and sometimes
surprising connections between Dirac nature of neutrinos and Dark
Matter stability, proton decay etc.
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