TeV-scale vector leptoquark from Pati-Salam unification with vectorlike families

被引:18
作者
Iguro, Syuhei [1 ]
Kawamura, Junichiro [2 ,3 ]
Okawa, Shohei [4 ]
Omura, Yuji [5 ]
机构
[1] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan
[2] Inst Basic Sci IBS, Ctr Theoret Phys Univ, Daejeon 34051, South Korea
[3] Keio Univ, Dept Phys, Yokohama, Kanagawa 2238522, Japan
[4] Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 5C2, Canada
[5] Kindai Univ, Dept Phys, Higashiosaka, Osaka 5778502, Japan
基金
日本学术振兴会; 加拿大自然科学与工程研究理事会;
关键词
QUARK-LEPTON UNIFICATION; MU-E CONVERSION; R-K; VIOLATION; FORMULAS; SEARCH; NUMBER;
D O I
10.1103/PhysRevD.104.075008
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In this paper, we show an explicit way to realize a TeV-scale vector leptoquark from the Pati-Salam unification with extra vectorlike families. The leptoquark mass is constrained to be heavier than PeV scale by the measurement of a flavor violating kaon decay, K-L -> mu e, in conventional models. This strong constraint can be avoided by introducing vectorlike families consistently with the quark and lepton masses and Cabbibo-Kobayashi-Maskawa and Pontecorvo-Maki-Nakagawa-Sakata matrices. In this model, the vector leptoquark can be sufficiently light to explain the recent b -> s mu mu anomaly, while the b -> c tau nu anomaly is difficult to be explained due to the strong constraints from the Z' boson and vectorlike quark searches at the LHC. When the b -> s mu mu anomaly is explained, we show that O (0.2)% tuning is required in the fermion matrix, the future experiments in mu -> e gamma and mu-e conversions will cover most available parameter space, and sizable neutral meson mixings, induced by the extra Higgs doublets, are unavoidable.
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页数:34
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