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Probing right-handed neutrinos dipole operators

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arxiv 2209.13469 v2 pith:JPKWKR4P submitted 2022-09-27 hep-ph hep-ex

classification hep-phhep-ex
keywords dipoleeffectiveright-handedanubisastrophysicalaugmentedboundscodex-b
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We consider the minimal see-saw extension of the Standard Model with two right-handed singlet fermions $N_{1,2}$ with mass at the GeV scale, augmented by an effective dipole operator between the sterile states. We firstly review current bounds on this effective interaction from fixed-target and collider experiments as well as from astrophysical and cosmological observations. We then highlight the prospects for testing the decay $N_2 \to N_1 \gamma$ induced by the dipole at future facilities targeting long lived particles such as ANUBIS, CODEX-b, FACET, FASER 2, MAPP and SHiP.

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Forward citations

Cited by 3 Pith papers

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

  1. Resonant electromagnetic leptogenesis with coherent heavy-neutrino evolution

    hep-ph 2026-03 conditional novelty 6.0 of 10

    Resonant electromagnetic leptogenesis from TeV-scale neutrino dipole operators can reach the observed baryon asymmetry, but only with tuned mass splittings and diluted overproduction.

  2. Heavy neutral leptons and top quarks in effective field theory

    hep-ph 2025-01 conditional novelty 6.0 of 10

    Long-lived heavy neutral leptons produced via top-quark effective operators could be probed at the HL-LHC up to new-physics scales around 12 TeV at ATLAS and 4.5 TeV at MATHUSLA or ANUBIS.

  3. Electromagnetic leptogenesis with light-heavy sterile neutrinos

    hep-ph 2025-01 conditional novelty 5.0 of 10

    A leptogenesis model generates the baryon asymmetry at the TeV scale through two-body decays of heavy right-handed neutrinos to lighter sterile neutrinos via a dimension-5 electromagnetic dipole operator, with implica...

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