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Title: SU(5) unification with TeV-scale leptoquarks

Abstract

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 10 16 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.

Authors:
ORCiD logo [1];  [2];  [3];  [1]
  1. Univ. of Tokyo (Japan). Kavli Inst. for the Physics and Mathematics of the Universe
  2. 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
  3. Univ. Paris-Sud, Orsay (France). Lab. of Theoretical Physics; Univ. of Sao Paulo (Brazil). Inst. of Physics
Publication Date:
Research Org.:
Univ. of Tokyo (Japan). Kavli Inst. for the Physics and Mathematics of the Universe
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); Univ. of Sydney (Australia); Ministry of Education, Culture, Sports, Science and Technology (MEXT); World Premier International Research Center Initiative (WPI Initiative); European Union (EU)
OSTI Identifier:
1423956
Grant/Contract Number:  
SC0009937; 26104009; 26287039; 16H02176; 690575; 674896
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; Journal Issue: 3; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; GUT

Citation Formats

Cox, Peter, Kusenko, Alexander, Sumensari, Olcyr, and Yanagida, Tsutomu T. SU(5) unification with TeV-scale leptoquarks. United States: N. p., 2017. Web. doi:10.1007/JHEP03(2017)035.
Cox, Peter, Kusenko, Alexander, Sumensari, Olcyr, & Yanagida, Tsutomu T. SU(5) unification with TeV-scale leptoquarks. United States. doi:10.1007/JHEP03(2017)035.
Cox, Peter, Kusenko, Alexander, Sumensari, Olcyr, and Yanagida, Tsutomu T. Tue . "SU(5) unification with TeV-scale leptoquarks". United States. doi:10.1007/JHEP03(2017)035. https://www.osti.gov/servlets/purl/1423956.
@article{osti_1423956,
title = {SU(5) unification with TeV-scale leptoquarks},
author = {Cox, Peter and Kusenko, Alexander and Sumensari, Olcyr and Yanagida, Tsutomu T.},
abstractNote = {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.},
doi = {10.1007/JHEP03(2017)035},
journal = {Journal of High Energy Physics (Online)},
number = 3,
volume = 2017,
place = {United States},
year = {Tue Mar 07 00:00:00 EST 2017},
month = {Tue Mar 07 00:00:00 EST 2017}
}

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Cited by: 13 works
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