Probing the pseudo-Dirac neutrino scenario at IceCube with Galactic plane neutrino flux
ORAL
Abstract
The IceCube Neutrino Observatory recently published evidence for diffuse neutrino emission from
the Galactic Plane (GP) at 4.5σ significance. This new source of astrophysical neutrinos provides an
exciting laboratory for probing the nature of neutrino masses. In particular, extremely small mass
splittings––such as those predicted by pseudo-Dirac (PD) neutrino mass models—would induce
detectable oscillation signatures in neutrinos with TeV-scale energies traversing kiloparsec-scale
baselines. Using updated galactic neutrino emission models, we find that IceCube can differentiate
Standard Model and PD scenarios for previously unexplored mass splittings in the 10-14 eV2 ≲
δm2 ≲ 10-12 eV2 range. Our analysis doesn’t consider astrophysical background flux from sources
other than the GP. These initial results strongly motivate an official IceCube analysis, taking into
account astrophysical background flux.
the Galactic Plane (GP) at 4.5σ significance. This new source of astrophysical neutrinos provides an
exciting laboratory for probing the nature of neutrino masses. In particular, extremely small mass
splittings––such as those predicted by pseudo-Dirac (PD) neutrino mass models—would induce
detectable oscillation signatures in neutrinos with TeV-scale energies traversing kiloparsec-scale
baselines. Using updated galactic neutrino emission models, we find that IceCube can differentiate
Standard Model and PD scenarios for previously unexplored mass splittings in the 10-14 eV2 ≲
δm2 ≲ 10-12 eV2 range. Our analysis doesn’t consider astrophysical background flux from sources
other than the GP. These initial results strongly motivate an official IceCube analysis, taking into
account astrophysical background flux.
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Presenters
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Miller MacDonald
Harvard University
Authors
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Miller MacDonald
Harvard University
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Kiara Carloni
Harvard University
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Ivan Martinez-Soler
Durham University
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Rafael Alves Batista
Universidade Autónoma de Madrid
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Carlos Argüelles-Delgado
Harvard University