#### Searching for flavored gauge bosons

Journal of High Energy Physics
February 2019, 2019:93 | Cite as
Searching for flavored gauge bosons
AuthorsAuthors and affiliations
Eung Jin ChunArindam DasJinsu KimJongkuk Kim
Open Access
Regular Article - Theoretical Physics
First Online: 14 February 2019
Abstract
Standard Model may allow an extended gauge sector with anomaly-free flavored gauge symmetries, such as Li −Lj , Bi −Lj , and B −3Li, where i, j = 1, 2, 3 are flavor indices. We investigate phenomenological implications of the new flavored gauge boson Z′ in the above three classes of gauge symmetries. Focusing on the gauge boson mass above 5 GeV, we use the lepton universality test in the Z and τ /μ decays, LEP searches, LHC searches, neutrino trident production bound, and LHC Z → 4μ searches to put constraints on the g′ −MZ′ plane. When L1 is involved, the LEP bounds on the e−e+ → ℓ−ℓ+ processes give the most stringent bounds, while the LHC bound becomes the strongest constraints in the large \( {M}_{Z^{\prime }} \) region when Bi is involved. The bound from Z → 4μ productions, which is applicable for L2-involved scenarios, provides stringent bounds in the small \( {M}_{Z^{\prime }} \) region. One exception is the B − 3L2 scenario, in which case only a small region is favored due to the lepton universality.
Keywords Beyond Standard Model Gauge Symmetry
ArXiv ePrint: 1811.04320
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Open Access
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
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Copyright information
© The Author(s) 2019
Authors and Affiliations
Eung Jin Chun1Arindam Das1Jinsu Kim2Email authorJongkuk Kim31.Korea Institute for Advanced StudySeoulKorea2.Institute for Theoretical PhysicsGeorg-August University GöttingenGöttingenGermany3.Department of Physics, BK21 Physics Research Division, Institute of Basic ScienceSungkyunkwan UniversitySuwonKorea