Abstract
We propose a generation dependent lepton/baryon gauge symmetry, \( \mathrm{U}{(1)}_{B_3-{x}_{\mu }{L}_{\mu }-{x}_{\tau }{L}_{\tau }}\equiv \mathrm{U}{(1)}_X \) (with xμ + xτ = 1 for anomaly cancellation), as a possible solution for the b → sμ+μ− anomalies. By introducing two Higgs doublet fields, we can reproduce the observed CKM matrix, and generate flavor changing Z′ interactions in the quark sector. Thus one can explain observed anomalies in b → sℓ+ℓ− decay with the lepton non-universal U(1)X charge assignments. We show the minimal setup explaining b→sℓ+ℓ− anomalies, neutrino masses and mixings and dark matter candidate, taking into account experimental constraints of flavor physics such as charged lepton flavor violations and the \( {B}_s-{\overline{B}}_s \) mixing. Finally we discuss collider physics focusing on Z′ production at the Large Hadron Collider and relic density of our dark matter candidate.
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Ko, P., Nomura, T. & Yu, C. b→sμ+μ− anomalies and related phenomenology in \( \mathrm{U}{(1)}_{{\mathrm{B}}_3-{\mathrm{x}}_{\mu }{\mathrm{L}}_{\mu }-{\mathrm{x}}_{\tau }{\mathrm{L}}_{\tau }} \) flavor gauge models. J. High Energ. Phys. 2019, 102 (2019). https://doi.org/10.1007/JHEP04(2019)102
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DOI: https://doi.org/10.1007/JHEP04(2019)102