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Lepton Number Violation in Higgs Decay at LHC
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Lepton Number Violation in Higgs Decay at LHC
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We show that within the Left-Right symmetric model, lepton number violating decays of the Higgs boson can be discovered at the LHC. The process is due to the mixing of the Higgs with the triplet that breaks parity. As a result, the Higgs can act as a gateway to the origin of heavy Majorana neutrino mass. To assess the LHC reach, a detailed collider study of the same-sign di-leptons plus jets channel is provided. This process is complementary to the existing nuclear and collider searches for lepton number violation and can probe the scale of parity restoration even beyond other direct searches.
Forward citations
Cited by 4 Pith papers
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Right-Handed Leptonic Mixing and Enhancement Band in Left-Right Symmetry
Parity in the Dirac leptonic sector of minimal left-right models induces a localized, branch-dependent enhancement band with parametrically large RH-LH misalignment despite small parity breaking.
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Right-Handed Leptonic Mixing and Enhancement Band in Left-Right Symmetry
Parity in the Dirac leptonic sector of the minimal left-right model produces a branch-dependent enhancement band of large RH-LH mixing misalignment driven by small parity breaking and neutrino near-degeneracies.
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Revealing Neutrino Mass Ordering at CEPC and FCC-ee
In the minimal two-HNL seesaw, heavy neutral lepton flavor mixings encode the normal vs inverted neutrino mass ordering, and CEPC/FCC-ee could distinguish them for total mixing U_tot^2 ≳ 10^-6.
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Loop-Level Lepton Flavor Violation and Diphoton Signals in the Minimal Left-Right Symmetric Model
Recasting axion limits onto the one-loop H3 couplings of the minimal left-right symmetric model excludes the right-handed scale up to 2×10^9 GeV and could eventually probe 6×10^11 GeV.
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