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Title: Resurrecting minimal Yukawa sector of SUSY SO(10)

Abstract

Supersymmetric SO(10) models with Yukawa coupling matrices involving only a 10 H and a $$\overline{126}$$ H of Higgs fields can lead to a predictive and consistent scenario for fermion masses and mixings, including the neutrino sector. However, when coupled minimally to a symmetry breaking sector that includes a 210 H and a 126 H, these models lead either to an unacceptably small neutrino mass scale, or to non-perturbative values of the gauge couplings. Here we show that with the addition of a 54 H to the symmetry breaking sector, the successful predictions of these models for fermion masses and mixings can be maintained. The 54H enables a reduction of the B - L symmetry breaking scale to an intermediate value of order 10 12 GeV, consistent with the observed neutrino mass spectrum, while preserving perturbative gauge coupling unification. We obtain an excellent fit to all fermion masses and mixings in this framework. We analyze carefully the prediction of the model for CP violation in neutrino oscillations. Consistency with proton lifetime, however, requires a mini-split SUSY spectrum with the squarks and sleptons having masses of order 100 TeV, accompanied by TeV scale gauginos and Higgsinos. Such a spectrum may arise from pure gravity mediation, which would predict the partial lifetime for the decay p→$$\bar{ν}$$K + to be an order of magnitude above the current experimental limit.

Authors:
 [1];  [2]; ORCiD logo [1]
  1. Oklahoma State Univ., Stillwater, OK (United States). Dept. of Physics
  2. Jožef Stefan Inst., Ljubljana (Slovenia)
Publication Date:
Research Org.:
Oklahoma State Univ., Stillwater, OK (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1483943
Grant/Contract Number:  
SC0016013
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Volume: 2018; Journal Issue: 10; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Babu, K. S., Bajc, Borut, and Saad, Shaikh. Resurrecting minimal Yukawa sector of SUSY SO(10). United States: N. p., 2018. Web. doi:10.1007/JHEP10(2018)135.
Babu, K. S., Bajc, Borut, & Saad, Shaikh. Resurrecting minimal Yukawa sector of SUSY SO(10). United States. doi:10.1007/JHEP10(2018)135.
Babu, K. S., Bajc, Borut, and Saad, Shaikh. Mon . "Resurrecting minimal Yukawa sector of SUSY SO(10)". United States. doi:10.1007/JHEP10(2018)135. https://www.osti.gov/servlets/purl/1483943.
@article{osti_1483943,
title = {Resurrecting minimal Yukawa sector of SUSY SO(10)},
author = {Babu, K. S. and Bajc, Borut and Saad, Shaikh},
abstractNote = {Supersymmetric SO(10) models with Yukawa coupling matrices involving only a 10H and a $\overline{126}$H of Higgs fields can lead to a predictive and consistent scenario for fermion masses and mixings, including the neutrino sector. However, when coupled minimally to a symmetry breaking sector that includes a 210H and a 126H, these models lead either to an unacceptably small neutrino mass scale, or to non-perturbative values of the gauge couplings. Here we show that with the addition of a 54H to the symmetry breaking sector, the successful predictions of these models for fermion masses and mixings can be maintained. The 54H enables a reduction of the B - L symmetry breaking scale to an intermediate value of order 1012 GeV, consistent with the observed neutrino mass spectrum, while preserving perturbative gauge coupling unification. We obtain an excellent fit to all fermion masses and mixings in this framework. We analyze carefully the prediction of the model for CP violation in neutrino oscillations. Consistency with proton lifetime, however, requires a mini-split SUSY spectrum with the squarks and sleptons having masses of order 100 TeV, accompanied by TeV scale gauginos and Higgsinos. Such a spectrum may arise from pure gravity mediation, which would predict the partial lifetime for the decay p→$\bar{ν}$K+ to be an order of magnitude above the current experimental limit.},
doi = {10.1007/JHEP10(2018)135},
journal = {Journal of High Energy Physics (Online)},
issn = {1029-8479},
number = 10,
volume = 2018,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
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