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Implications of a Massless Neutralino for Neutrino Physics
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We consider the phenomenological implications of a soft SUSY breaking term BN at the TeV scale (here B is the U(1)_Y gaugino and N is the right-handed neutrino field). In models with a massless (or nearly massless) neutralino, such a term will give rise through the see-saw mechanism to new contributions to the mass matrix of the light neutrinos. We treat the massless neutralino as an (almost) sterile neutrino and find that its mass depends on the square of the soft SUSY breaking scale, with interesting consequences for neutrino physics. We also show that, although it requires fine-tuning, a massless neutralino in the MSSM or NMSSM is not experimentally excluded. The implications of this scenario for neutrino physics are discussed.
Forward citations
Cited by 2 Pith papers
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Searching for long-lived light neutralinos from $B$-meson decays with baryonic R-parity violation at Belle II
Belle II could detect long-lived bino neutralinos produced in B-meson decays, with a new partial-reconstruction method sensitive to RPV couplings far beyond existing bounds.
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The Single Photon Signature of a Light Long-lived Neutralino at Remote Detectors at the LHC
ANUBIS offers the highest projected sensitivity for detecting single-photon signatures from long-lived neutralinos at the LHC among several remote detector proposals, based on six benchmark scenarios.
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