Journal article
Unification and LHC phenomenology of F-theory GUTs with U(1)PQ
MJ Dolan, J Marsano, S Schäfer-Namekic
Journal of High Energy Physics | Published : 2011
Abstract
We undertake a phenomenological study of SU(5) F-theory GUT models with an additional U(1)PQ symmetry. In such models, breaking SU(5) with hypercharge flux leads to the presence of non-GUT multiplets in the spectrum. We study the effect these have on the unification of gauge couplings, including two-loop running as well as lowand high-scale threshold corrections. We use the requirement of unification to constrain the size of thresholds from KK modes of SU(5) gauge and matter fields. Assuming the non-GUT multiplets play the role of messengers of gauge mediation leads to controlled non-universalities in the sparticle spectrum while maintaining grand unification, and we study the LHC phenomenol..
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Awarded by Science and Technology Facilities Council
Funding Acknowledgements
We thank K. Bobkov, P. Kumar, N. Saulina, and M. Wijnholt for discussions. We would like to thank the organizers of the MPI Munich workshop "GUTs and Strings" for providing a stimulating research environment where this collaboration began. MJD thanks CERN for hospitality during the completion of this work. SS-N thanks the Caltech theory group and the KITP for hospitality during the course of this work. The work of JM is supported by DOE grant DE- FG02-90ER-40560 and NSF grant PHY-0855039, and the work of SSN is supported by STFC.