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Bounds on heavy Majorana neutrinos in type-I seesaw and implications for collider searches

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arxiv 1702.04668 v3 pith:T6TCPXIL submitted 2017-02-15 hep-ph hep-ex

classification hep-phhep-ex
keywords neutrinosheavymajorananeutrinoseesawelectroweakmixingsparameter
verification ladder T0 review T1 audit T2 compute T3 formal

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The neutrino masses and flavor mixings, which are missing in the Standard Model (SM), can be naturally incorporated in the type-I seesaw extension of the SM with heavy Majorana neutrinos being singlet under the SM gauge group. If the heavy Majorana neutrinos are around the electroweak scale and their mixings with the SM neutrinos are sizable, they can be produced at high energy colliders, leaving characteristic signatures with lepton-number violations. Employing the general parametrization for the neutrino Dirac mass matrix in the minimal seesaw scenario, we perform a parameter scan and identify allowed regions to satisfy a variety of experimental constraints from the neutrino oscillation data, the electroweak precision measurements and the lepton-flavor violating processes. We find that the resultant mixing parameters between the heavy neutrinos and the SM neutrinos are more severely constrained than those obtained from the current search for heavy Majorana neutrinos at the LHC. Such parameter regions can be explored at the High-Luminosity LHC and a 100 TeV pp-collider in the future.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Revealing Neutrino Mass Ordering at CEPC and FCC-ee

    hep-ph 2026-01 conditional novelty 6.0 of 10

    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.

  2. Sensitivity of Lepton Number Violating Meson Decays in Different Experiments

    hep-ph 2019-08 conditional novelty 5.0 of 10

    For 0.14 to 6 GeV heavy neutrinos, accounting for the parent meson's velocity weakens projected LNV meson decay sensitivities by one to two orders of magnitude at NA62 and SHiP.

  3. Leptonic CP asymmetry and heavy neutrino searches in seesaw scenario

    hep-ph 2026-06 unverdicted novelty 4.0 of 10

    Projects LHC and HL-LHC sensitivities to heavy neutrino mixing via dilepton channels in seesaw scenario, with dependence on R_ll and CP asymmetry.

  4. Phenomenology of $keV$ sterile neutrino in minimal extended seesaw

    hep-ph 2019-08 reject novelty 3.0 of 10

    A single keV sterile neutrino in the minimal extended seesaw with A4 flavor symmetry is scanned against 0νββ, dark matter, and leptogenesis constraints, and the normal neutrino mass ordering emerges as favored.

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