Abstract
We present a Left-Right symmetric model that provides an explanation for the mass hierarchy of the charged fermions within the framework of the Standard Model. This explanation is achieved through the utilization of both tree-level and radiative seesaw mechanisms. In this model, the tiny masses of the light active neutrinos are generated via a three-loop radiative inverse seesaw mechanism, with Dirac and Majorana submatrices arising at one-loop level. To the best of our knowledge, this is the first example of the inverse seesaw mechanism being implemented with both submatrices generated at one- loop level. The model contains a global U(1)X symmetry which, after its spontaneous breaking, allows for the stabilization of the Dark Matter (DM) candidates. We show that the electroweak precision observables, the electron and muon anomalous magnetic moments as well as the Charged Lepton Flavor Violating decays, μ → eγ, are consistent with the current experimental limits. In addition, we analyze the implications of the model for the 95 GeV diphoton excess recently reported by the CMS collaboration and demonstrate that such anomaly could be easily accommodated. Finally, we discuss qualitative aspects of DM in the considered model.
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Acknowledgments
A.E.C.H, I.S. and S.K. are supported by ANID-Chile FONDECYT 1210378, ANID-Chile FONDECYT 1230391, ANID-Chile FONDECYT 1180232, ANID-Chile FONDECYT 3150472, ANID-Chile FONDECYT 1230160, ANID PIA/APOYO AFB220004 and Proyecto Milenio-ANID: ICN2019_044. The work of C.B. was supported by FONDECYT grant No. 11201240. R.P. is supported in part by the Swedish Research Council grant, contract number 2016-05996, as well as by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 668679). H.L. is supported by the National Science Centre (Poland) under the research Grant No. 2017/26/ E/ST2/00470. C.B. would like to acknowledge the hospitality and support from the ICTP through the Associates Programme (2023–2028).
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Bonilla, C., Cárcamo Hernández, A.E., Kovalenko, S. et al. Fermion mass hierarchy in an extended left-right symmetric model. J. High Energ. Phys. 2023, 75 (2023). https://doi.org/10.1007/JHEP12(2023)075
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DOI: https://doi.org/10.1007/JHEP12(2023)075