Supersymmetry searches in GUT models with non-universal scalar masses

We study SO(10), SU(5) and flipped SU(5) GUT models with non-universal soft supersymmetry-breaking scalar masses, exploring how they are constrained by LHC supersymmetry searches and cold dark matter experiments, and how they can be probed and distinguished in future experiments. We find characteristic differences between the various GUT scenarios, particularly in the coannihilation region, which is very sensitive to changes of parameters. For example, the flipped SU(5) GUT predicts the possibility of ̃t1−χ coannihilation, which is absent in the regions of the SO(10) and SU(5) GUT parameter spaces that we study. We use the relic density predictions in different models to determine upper bounds for the neutralino masses, and we find large differences between different GUT models in the sparticle spectra for the same LSP mass, leading to direct connections of distinctive possible experimental measurements with the structure of the GUT group. We find that future LHC searches for generic missing ET, charginos and stops will be able to constrain the different GUT models in complementary ways, as will the Xenon 1 ton and Darwin dark matter scattering experiments and future FERMI or CTA γ-ray searches. ; The work of J.E. has been supported in part by the European Research Council via the Advanced Investigator Grant 267352, and by the UK STFC via the research grant ST/L000326/1. The work of M.C. has been supported in part by the MINECO grant FPA2011-23778 and by the MINECO/FEDER research grant CPI-14-397, and acknowledges A. Pich, G. Rodrigo, J. Portol´es, P. Hern´andez and N. Rius for hospitality at IFIC in Valencia where part of this work was done. M.C. and M.E.G. acknowledge support from the MINECO grant: ”Fenomenolog´ıa en F´ısica de Part´ıculas y Astropart´ıculas” (FPA2014-53631). S.L. thanks CERN for kind hospitality. R. RdA is supported by the Ram´on y Cajal program of the Spanish MICINN, by the Invisibles European ITN project (FP7-PEOPLE-2011-ITN, PITN-GA-2011-289442-INVISIBLES), and by the MEC projects “SOM: ...