Journal article
SU(5) unification with TeV-scale leptoquarks
P Cox, A Kusenko, O Sumensari, TT Yanagida
Journal of High Energy Physics | SPRINGER | Published : 2017
Abstract
It was previously noted that SU(5) unification can be achieved via the simple addition of light scalar leptoquarks from two split 10 multiplets. We explore the parameter space of this model in detail and find that unification requires at least one leptoquark to have mass below ≈ 16 TeV. We point out that introducing splitting of the 24 allows the unification scale to be raised beyond 1016 GeV, while a U(1)PQ symmetry can be imposed to forbid dangerous proton decay mediated by the light leptoquarks. The latest bounds from LHC searches are combined and we find that a leptoquark as light as 400 GeV is still permitted. Finally, we discuss the interesting possibility that the leptoquarks required..
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Awarded by Horizon 2020 Framework Programme
Funding Acknowledgements
O.S. would like to thank Damir Becirevic and Nejc Kosnik for useful discussions, and Kavli IPMU for its kind hospitality. A.K. and T.T.Y. thank Prof. Archil Kobakhidze for the hospitality during their stay at the University of Sydney. This work is supported by Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports, and Culture (MEXT), Japan, No. 26104009 (T.T.Y.), No. 26287039 (T.T.Y.) and No. 16H02176 (T.T.Y.), and World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan (P.C., A.K. and T.T.Y.). The work of A.K. was supported by the U.S. Department of Energy Grant No. DE-SC0009937. This project has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreements No. 690575 and No. 674896.