Resonant Neutrino Flavor Conversion in the Atmosphere
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866917671088422912 |
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| author | Sponsler, Connor Hostert, Matheus Martinez-Soler, Ivan Argüelles, Carlos A. |
| author_facet | Sponsler, Connor Hostert, Matheus Martinez-Soler, Ivan Argüelles, Carlos A. |
| contents | Neutrinos produced in the atmosphere traverse a column density of air before being detected at neutrino observatories like IceCube or KM3NeT. In this work, we extend the neutrino flavor evolution in the {nuSQuIDS} code accounting for the varying height of neutrino production and the variable air density in the atmosphere. These effects can lead to sizeable spectral distortions in standard neutrino oscillations and are crucial to accurately describe some new physics scenarios. As an example, we study a model of quasi-sterile neutrinos that induce resonant flavor conversions at neutrino energies of ${O}(300)\text{ MeV}$ in matter densities of $1 \text{ g/cm}^3$. In atmospheric air densities, the same resonance is then realized at neutrino energies of ${O}(300- 700)$~GeV. We find that the new resonance can deplete the $ν_μ+ \overlineν_μ$ flux at the IceCube Neutrino Observatory by as much as $10\%$ in the direction of the horizon. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_12140 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Resonant Neutrino Flavor Conversion in the Atmosphere Sponsler, Connor Hostert, Matheus Martinez-Soler, Ivan Argüelles, Carlos A. High Energy Physics - Phenomenology High Energy Physics - Experiment Neutrinos produced in the atmosphere traverse a column density of air before being detected at neutrino observatories like IceCube or KM3NeT. In this work, we extend the neutrino flavor evolution in the {nuSQuIDS} code accounting for the varying height of neutrino production and the variable air density in the atmosphere. These effects can lead to sizeable spectral distortions in standard neutrino oscillations and are crucial to accurately describe some new physics scenarios. As an example, we study a model of quasi-sterile neutrinos that induce resonant flavor conversions at neutrino energies of ${O}(300)\text{ MeV}$ in matter densities of $1 \text{ g/cm}^3$. In atmospheric air densities, the same resonance is then realized at neutrino energies of ${O}(300- 700)$~GeV. We find that the new resonance can deplete the $ν_μ+ \overlineν_μ$ flux at the IceCube Neutrino Observatory by as much as $10\%$ in the direction of the horizon. |
| title | Resonant Neutrino Flavor Conversion in the Atmosphere |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2405.12140 |