Light Dirac Neutrinos In An $SU(2)_L\times U(1)_Y$ Model
Abstract
Light Dirac neutrino of mass of mass of the order of few eV is obtained in an $SU(2)_L\times U(1)_Y$ model with an extended Higgs sector and righthanded neutrinos. Small neutrino mass is generated at the tree level through small effective coupling of the Dirac neutrino mass term due to soft discrete symmetry breaking. In order to remove the exact degeneracy in mass between the second and the third generation of neutrinos, one loop corrected mass terms are incorporated. The model can accommodate bimaximal mixing scenario of neutrino which has been favoured by recent Solar and atmospheric neutrino experiments.
 Publication:

arXiv eprints
 Pub Date:
 March 1999
 arXiv:
 arXiv:hepph/9903497
 Bibcode:
 1999hep.ph....3497G
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 Latex, 13 pages, no figures