Yukawa unification and neutralino dark matter in SU(4)c×SU(2)L×SU(2)R

Ilia Gogoladze, Rizwan Khalid, and Qaisar Shafi
Phys. Rev. D 79, 115004 – Published 8 June 2009

Abstract

We consider a left-right symmetric SU(4)c×SU(2)L×SU(2)R (4-2-2) model with gravity mediated supersymmetry breaking. We find that with 4-2-2 compatible nonuniversal gaugino masses, tbτ Yukawa coupling unification is consistent with neutralino dark matter abundance and with constraints from collider experiments (except (g2)μ). The gluino mass lies close to that of the lightest neutralino, so that the gluino coannihilation channel plays an important role in determining the neutralino relic abundance. By relaxing the Yukawa unification constraint we find stau and stop masses as low as 200–220 GeV. We highlight some benchmark points for these cases with 40tanβ58.

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  • Received 2 April 2009

DOI:https://doi.org/10.1103/PhysRevD.79.115004

©2009 American Physical Society

Authors & Affiliations

Ilia Gogoladze*, Rizwan Khalid, and Qaisar Shafi

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

  • *ilia@physics.udel.edu On leave of absence from: Andronikashvili Institute of Physics, GAS, 380077 Tbilisi, GA., USA
  • rizwan@udel.edu

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Issue

Vol. 79, Iss. 11 — 1 June 2009

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