2003/12/07 by Biswajoy Brahmachari
Physics and Astronomy · #hep-ph
published as J.Korean Phys.Soc. 45 (2004) S230-S231 · Latex. Invited talk in ICFP-2003, Seoul, Korea, Oct 6-11, 2003. To appear in proceedings
arxiv created 2003/12/07 · arxiv updated 2009/12/01
A left-right model of quarks and leptons based on the gauge group SU(3)c × SU(2)L × SU(2)R × U(1)B-L is studied. Here the scalar sector consists of only two doublets namely (1,2,1,1) and (1,1,2,1) but familiar bidoublet (1,2,2,0) is removed. Quarks and charged leptons get mass from a single see-saw mechanism but neutrinos get mass from a double see-saw mechanism. In this type of models the heaviest right handed neutrino can be of order 1013 GeVs or less in a natural way, depending on the size of related Yukawa couplings.