Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-01-15
Phys.Rev.D75:075003,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, 1 figure, to appear in Phys. Rev D
Scientific paper
10.1103/PhysRevD.75.075003
A low intermediate scale within minimal supersymmetric SO(10) GUTs is a desirable feature to accommodate leptogenesis. We explore this possibility in models where the intermediate gauge symmetry breaks spontaneously by (a) doublet Higgs scalars and also (b) by triplets. In both scenarios gauge coupling unification requires the scale of left-right symmetry breaking ($M_R$) to be close to the unification scale. This will entail unnaturally small neutrino Yukawa couplings to avoid the gravitino problem and allow successful leptogenesis. We point out that any one of three options -- threshold corrections due to the mass spectrum near the unification scale, gravity induced non-renormalizable operators near the Planck scale, or presence of additional light Higgs multiplets -- can permit unification along with much lower values of $M_R$ as required for leptogenesis. In the triplet model, independent of these corrections, we find a lower bound on the intermediate scale, $M_R > 10^9$ GeV, arising from the requirement that the theory must remain perturbative at least upto the GUT scale. We show that in the doublet model $M_R$ can even be in the TeV region which, apart from permitting resonant leptogenesis, can be tested at LHC and ILC.
Majee Swarup Kumar
Parida Mina K.
Raychaudhuri Amitava
Sarkar Utpal
No associations
LandOfFree
Low Intermediate Scales for Leptogenesis in Supersymmetric SO(10) Grand Unified Theories does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Low Intermediate Scales for Leptogenesis in Supersymmetric SO(10) Grand Unified Theories, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low Intermediate Scales for Leptogenesis in Supersymmetric SO(10) Grand Unified Theories will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-584804