Dirac neutrino
= Dirac neutrino
{c}
A <neutrino> with distinct particle and <antiparticle> states and a Dirac <mass> term connecting left- and right-chiral fields. If conventional <lepton number> is conserved, such a <mass> does not cause <neutrinoless double beta decay>. Oscillation evidence for nonzero <neutrino masses> does not alone distinguish the Dirac and Majorana possibilities.