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Direct Detection Experiments at the Neutrino Dipole Portal Frontier
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Heavy sterile neutrinos are typically invoked to accommodate the observed neutrino masses, by positing a new Yukawa term connecting these new states to the neutrinos in the electroweak doublet. However, given our ignorance of the neutrino sector we should explore additional interactions such sterile neutrinos may have with the SM. In this paper, we study the dimension-5 operator which couples the heavy state to a light neutrino and the photon. We find that the recent XENON1T direct detection data can improve the limits on this "Neutrino Dipole Portal" by up to an order of magnitude over previous bounds. Future direct detection experiments may be able to extend these bounds down to the level probed by SN1987A.
Forward citations
Cited by 4 Pith papers
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Dirt/Detector/Dump: Complementary BSM production at Short-Baseline Neutrino Facilities
Dump-produced heavy neutral leptons contribute substantially to short-baseline neutrino detector signals and can be separated from dirt and detector production by energy, angle, and timing.
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Neutrino electromagnetic properties and sterile dipole portal in light of the first solar CE$\nu$NS data
The paper derives the first 90% CL limits on neutrino magnetic moments, millicharges, and the sterile dipole portal from solar 8B CEνNS data in XENONnT and PandaX-4T.
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New Physics at the Muon (Synchrotron) Ion Collider: MuSIC for several scales
A TeV-scale muon-ion collider (MuSIC) could probe new physics in four BSM scenarios with reach surpassing the HL-LHC and other future facilities.
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Probing Light Dark Particles in Neutrino Scattering Experiments
A dark fermion produced in neutrino scattering could be probed at DUNE's near detector up to cutoff scales near 1 TeV, beyond CHARM II and LEP, while current COHERENT/CONUS+ limits stay below LHC bounds.
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