SU(5) unification with TeV-scale leptoquarks
- Univ. of Tokyo (Japan). Kavli Inst. for the Physics and Mathematics of the Universe
- Univ. of Tokyo (Japan). Kavli Inst. for the Physics and Mathematics of the Universe; Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
- Univ. Paris-Sud, Orsay (France). Lab. of Theoretical Physics; Univ. of Sao Paulo (Brazil). Inst. of Physics
It has previously been 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 for unification could also be responsible for the 2.6σ deviation observed in the ratio R K at LHCb.
- Research Organization:
- Univ. of Tokyo (Japan). Kavli Inst. for the Physics and Mathematics of the Universe
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); Univ. of Sydney (Australia); Ministry of Education, Culture, Sports, Science and Technology (MEXT); World Premier International Research Center Initiative (WPI Initiative); European Union (EU)
- Grant/Contract Number:
- SC0009937; 26104009; 26287039; 16H02176; 690575; 674896
- OSTI ID:
- 1423956
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2017, Issue 3; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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