Sparticle spectroscopy from SO(10) GUT with a unified Higgs sector

M. Adeel Ajaib, Ilia Gogoladze, and Qaisar Shafi
Phys. Rev. D 88, 095019 – Published 22 November 2013

Abstract

We study the low energy implications, especially the particle spectroscopy, of SO(10) grand unification in which the SO(10) symmetry is broken to the Standard Model gauge group with a single pair of (144+144¯)-dimensional Higgs multiplet (unified Higgs sector). In this class of models, the asymptotic relation YbYτYt/6 among the third generation quark and lepton Yukawa couplings can be derived. This relation leads to the prediction tanβ14, where tanβ is the well known Minimal Supersymmetric Standard Model parameter. We find that this type of Yukawa coupling unification (YU) is realized only by employing nonuniversal soft supersymmetry breaking terms, dictated by SO(10) symmetry, for the gauginos. A 125 GeV Higgs boson mass is also found to be consistent with YU at the 5% level. Without imposing a constraint on the relic abundance of dark matter in these models, the squark and slepton masses, with the exception of the top squark, exceed 2 TeV and the gluino is heavier than 1 TeV. We show that the neutralino in this model is an acceptable dark matter candidate through the neutralino–top squark coannihilation scenario, with the top squark being relatively light (500GeV).

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  • Received 4 September 2013

DOI:https://doi.org/10.1103/PhysRevD.88.095019

© 2013 American Physical Society

Authors & Affiliations

M. Adeel Ajaib*, Ilia Gogoladze, and Qaisar Shafi

  • Department of Physics and Astronomy, Bartol Research Institute, University of Delaware, Newark, Delaware 19716, USA

  • *adeel@udel.edu
  • On leave from Andronikashvili Institute of Physics, 0177 Tbilisi, Georgia. ilia@bartol.udel.edu
  • shafi@bartol.udel.edu

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Issue

Vol. 88, Iss. 9 — 1 November 2013

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