Neutralino dark matter and other LHC predictions from quasi Yukawa unification

Shafi Q., Tanyildizi S. H., ÜN C. S.

NUCLEAR PHYSICS B, vol.900, pp.400-411, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 900
  • Publication Date: 2015
  • Doi Number: 10.1016/j.nuclphysb.2015.09.019
  • Journal Name: NUCLEAR PHYSICS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.400-411
  • Bursa Uludag University Affiliated: Yes


We explore the dark matter and LHC implications of t - b - tau quasi Yukawa unification in the framework of supersymmetric models based on the gauge symmetry G = SU(4)(c) x SU(2)(L) x SU(2)(R). The deviation from exact Yukawa unification is quantified by a dimensionless parameter C(vertical bar C vertical bar less than or similar to 0.2), such that the Yukawa couplings at M-GUT are related by yt : yb : y tau = vertical bar 1 + C vertical bar : vertical bar 1 -C vertical bar : vertical bar 1 + 3C vertical bar. In contrast to earlier studies which focused on universal gaugino masses, we consider non-universal gaugino masses at M-GUT that are compatible with the gauge symmetry G. Our results reveal a variety of neutralino dark matter scenarios consistent with the observations. These include stau and chargino coannihilation scenarios, the A-resonance scenario, as well as Higgsino dark matter solutions which are more readily probed by direct detection searches. The gluino mass is found to be less than or similar to 4 TeV, the stop mass is greater than or similar to 2 TeV, while the first two family squarks and sleptons are of order 4-5 TeV and 3 TeV respectively. (C) 2015 The Authors. Published by Elsevier B.V.