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The MicroBooNE Experiment, the NuMI Absorber, and Heavy Neutral Leptons

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arxiv 2106.06548 v2 pith:XUXB5GKB submitted 2021-06-11 hep-ph hep-ex

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

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Motivated by the recent search for a Higgs-Portal Scalar decaying inside the MicroBooNE detector, we demonstrate that the same search can be used to constrain Heavy Neutral Leptons. These are gauge-singlet fermions that interact with the Standard Model by mixing with neutrinos only and could be related to the origin of neutrino masses. By recasting the results of the MicroBooNE Collaboration's analysis, we show that, for a Heavy Neutral Lepton that mixes predominantly with muon-flavored neutrinos, previously unexplored parameter space can be excluded for masses between 30 and 150 MeV. Additionally, we make our Monte Carlo tools publicly available.

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Forward citations

Cited by 6 Pith papers

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

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  2. Heavy neutral leptons from light scalar in fixed target and forward search experiments

    hep-ph 2026-07 conditional novelty 6.0 of 10

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  3. Low-scale seesaw with flavour and CP symmetries $\unicode{x2013}$ from colliders to leptogenesis

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    For four flavour-symmetry cases, this paper maps heavy-neutrino lifetimes, decay flavour ratios, and the parameter space where leptogenesis works and colliders can test it.

  4. Archimedean Seesaw: Small Neutrino Masses and Large Lepton-number Violation

    hep-ph 2026-08 conditional novelty 5.0 of 10

    A texture-zero seesaw model allows large lepton-number violation together with naturally small neutrino masses by protecting the light neutrino with an accidental symmetry.

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    hep-ph 2026-07 conditional novelty 5.0 of 10

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    hep-ph 2025-01 conditional novelty 4.0 of 10

    Projected 5-year sensitivity of the proposed CiADS-BDE shows reach beyond current bounds for HNLs, electrophilic and LFV ALPs, and RPV light binos.

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