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Title: Low intermediate scales for leptogenesis in supersymmetric SO(10) grand unified theories

Abstract

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{sub 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 nonrenormalizable operators near the Planck scale, or presence of additional light Higgs multiplets--can permit unification along with much lower values of M{sub R} as required for leptogenesis. In the triplet model, independent of these corrections, we find a lower bound on the intermediate scale, M{sub R}>10{sup 9} GeV, arising from the requirement that the theory must remain perturbative at least up to the GUT scale. We show that in the doublet model M{sub R} can even be in the TeV region which, apart from permitting resonant leptogenesis, can be tested at LHC and ILC.

Authors:
;  [1];  [2];  [1];  [3]
  1. Harish-Chandra Research Institute, Jhunsi, Allahabad 211 019 (India)
  2. (India)
  3. Physical Research Laboratory, Ahmedabad 380 009 (India)
Publication Date:
OSTI Identifier:
21020297
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.75.075003; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERN LHC; CORRECTIONS; COUPLING; GAUGE INVARIANCE; GEV RANGE; GRAND UNIFIED THEORY; GRAVITATION; HIGGS BOSONS; HIGGS MODEL; MASS SPECTRA; NEUTRINOS; SCALARS; SO-10 GROUPS; SUPERSYMMETRY; SYMMETRY BREAKING; TEV RANGE; TRIPLETS

Citation Formats

Majee, Swarup Kumar, Raychaudhuri, Amitava, Department of Physics, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, Parida, Mina K., and Sarkar, Utpal. Low intermediate scales for leptogenesis in supersymmetric SO(10) grand unified theories. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.075003.
Majee, Swarup Kumar, Raychaudhuri, Amitava, Department of Physics, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, Parida, Mina K., & Sarkar, Utpal. Low intermediate scales for leptogenesis in supersymmetric SO(10) grand unified theories. United States. doi:10.1103/PHYSREVD.75.075003.
Majee, Swarup Kumar, Raychaudhuri, Amitava, Department of Physics, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009, Parida, Mina K., and Sarkar, Utpal. Sun . "Low intermediate scales for leptogenesis in supersymmetric SO(10) grand unified theories". United States. doi:10.1103/PHYSREVD.75.075003.
@article{osti_21020297,
title = {Low intermediate scales for leptogenesis in supersymmetric SO(10) grand unified theories},
author = {Majee, Swarup Kumar and Raychaudhuri, Amitava and Department of Physics, University of Calcutta, 92 A.P.C. Road, Kolkata 700 009 and Parida, Mina K. and Sarkar, Utpal},
abstractNote = {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{sub 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 nonrenormalizable operators near the Planck scale, or presence of additional light Higgs multiplets--can permit unification along with much lower values of M{sub R} as required for leptogenesis. In the triplet model, independent of these corrections, we find a lower bound on the intermediate scale, M{sub R}>10{sup 9} GeV, arising from the requirement that the theory must remain perturbative at least up to the GUT scale. We show that in the doublet model M{sub R} can even be in the TeV region which, apart from permitting resonant leptogenesis, can be tested at LHC and ILC.},
doi = {10.1103/PHYSREVD.75.075003},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 75,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}