Abstract
Abstract LHC constraints on the recently proposed SUSY SO(10) GUT model with top-bottom-tau Yukawa unification are investigated. In this model, various phenomenological constraints are in concord with the Yukawa unification thanks to the negative sign of μ, D-term splitting in the soft scalar masses and non-universal gaugino masses generated by a non-zero F -term in a 24-dimensional representation of SU(5) ⊂ SO(10). After discussing the impact of the CP-odd Higgs boson mass bound on this model, we provide a detailed analysis of the recent direct SUSY searches performed by ATLAS and investigate the constraints on this SO(10) model. At 95% confidence level, the lower limit on the gluino mass is found to be 675 GeV. Assuming an integrated luminosity of 10 fb−1, this bound may be extended to 1.1 TeV if the right-handed down squark is lighter than about 1 TeV.
Highlights
The requirement of the top-bottom-tau Yukawa unification prefers negative values of the Higgs-mixing parameter, μ.1 a model with the negative μ and the universal gaugino masses [11, 12] predicts a negative SUSY contribution to the muon anomalous magnetic moment, (g − 2)μ, and enlarges the observed discrepancy between theory and experiment
Various phenomenological constraints are in concord with the Yukawa unification thanks to the negative sign of μ, D-term splitting in the soft scalar masses and non-universal gaugino masses generated by a non-zero F -term in a 24-dimensional representation of SU(5) ⊂ SO(10)
In order to investigate the LHC constraints on the SO(10) model we focus in this paper on the SUSY searches performed by ATLAS, one can expect that the limits from the CMS searches are comparable
Summary
In order to investigate the LHC constraints on the SO(10) model we focus in this paper on the SUSY searches performed by ATLAS, one can expect that the limits from the CMS searches are comparable. The cuts defining the four signal regions of the b-jet 0-lepton search are summarized in table 2 Another analysis which may be sensitive to the SO(10) model was released most recently and focuses on search for new phenomena with large jet multiplicities and missing transverse momentum [44] using 1.34 fb−1 of data. We shall describe our procedure of computing n(si) and σs(i) and validate it against the ATLAS exclusion plots for the CMSSM (in the case of the 0-lepton [43] and the multijets [44] analyses) and the simplified model with the gluino, the sbottom and the lightest neutralino (in the case of the b-jet analysis [22])
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
