| Summary: | Abstract Standard Model may allow an extended gauge sector with anomaly-free flavored gauge symmetries, such as L i −L j , B i −L j , and B −3L i , 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 ′ −M Z ′ plane. When L 1 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 ′ $$ {M}_{Z^{\prime }} $$ region when B i is involved. The bound from Z → 4μ productions, which is applicable for L 2-involved scenarios, provides stringent bounds in the small M Z ′ $$ {M}_{Z^{\prime }} $$ region. One exception is the B − 3L 2 scenario, in which case only a small region is favored due to the lepton universality.
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