We consider the minimal see-saw extension of the Standard Model with two right-handed singlet fermions N-1,N-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 -> 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.

Probing right-handed neutrinos dipole operators

Daniele Barducci;
2023-01-01

Abstract

We consider the minimal see-saw extension of the Standard Model with two right-handed singlet fermions N-1,N-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 -> 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.
2023
Barducci, Daniele; Bertuzzo, Enrico; Taoso, Marco; Toni, Claudio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1219707
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