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<p>We present a comprehensive phenomenological study of a class of six vector-like lepton models with seesaw-like mass contributions and strong modifications to Higgs and lepton phenomenology. We focus on lepton flavour conserving and violating observables across all lepton generations and collider observables like <i>Z</i> and Higgs decays. In light of the recent progress at the LHC and precision measurements such as muon <i>g</i> – 2, as well as in anticipation of upcoming experiments like MEGII, Mu2e/COMET, Mu3e, Belle II and at the HL-LHC, we systematically survey the viable parameter space and identify patterns and correlations. The considered class of models gives rise to a rich and testable phenomenology with robust and complementary probes that allow to distinguish between models in the coming experimental era.</p>

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From Higgs physics to lepton flavour violation: current bounds and future prospects for vector-like lepton models

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月28日

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  • Gregor Daberstiel,
  • Kilian Möhling,
  • Dominik Stöckinger,
  • Hyejung Stöckinger-Kim

摘要

We present a comprehensive phenomenological study of a class of six vector-like lepton models with seesaw-like mass contributions and strong modifications to Higgs and lepton phenomenology. We focus on lepton flavour conserving and violating observables across all lepton generations and collider observables like Z and Higgs decays. In light of the recent progress at the LHC and precision measurements such as muon g – 2, as well as in anticipation of upcoming experiments like MEGII, Mu2e/COMET, Mu3e, Belle II and at the HL-LHC, we systematically survey the viable parameter space and identify patterns and correlations. The considered class of models gives rise to a rich and testable phenomenology with robust and complementary probes that allow to distinguish between models in the coming experimental era.