Astrophysical bounds on the high-energy evolution of neutrino mixing
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866910133109391360 |
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| author | Bustamante, Mauricio Liu, Qinrui Barenboim, Gabriela |
| author_facet | Bustamante, Mauricio Liu, Qinrui Barenboim, Gabriela |
| contents | While conventional oscillation experiments measure neutrino mixing parameters with high precision, these measurements are strictly confined to sub-TeV scales. At higher energies, renormalization-group effects can cause these parameters to evolve with the transferred momentum, $Q$. High-energy and ultra-high-energy astrophysical neutrinos, spanning TeV to EeV energies, probe high values of $Q$ unreachable by conventional experiments, offering an unprecedented test of high-energy mixing. We use the flavor composition of these neutrinos -- the relative proportions of $ν_e$, $ν_μ$, and $ν_τ$ -- to constrain this evolution, both phenomenologically and within dimension-6 Standard Model Effective Field Theory. We account for astrophysical uncertainties -- an unavoidable requirement to obtain realistic results, even though this weakens the bounds. Although present IceCube measurements lack the sensitivity to detect this running, we forecast that upcoming multi-detector combinations will place unprecedented bounds on the high-energy evolution of neutrino mixing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_14409 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Astrophysical bounds on the high-energy evolution of neutrino mixing Bustamante, Mauricio Liu, Qinrui Barenboim, Gabriela High Energy Physics - Phenomenology High Energy Astrophysical Phenomena High Energy Physics - Experiment High Energy Physics - Theory While conventional oscillation experiments measure neutrino mixing parameters with high precision, these measurements are strictly confined to sub-TeV scales. At higher energies, renormalization-group effects can cause these parameters to evolve with the transferred momentum, $Q$. High-energy and ultra-high-energy astrophysical neutrinos, spanning TeV to EeV energies, probe high values of $Q$ unreachable by conventional experiments, offering an unprecedented test of high-energy mixing. We use the flavor composition of these neutrinos -- the relative proportions of $ν_e$, $ν_μ$, and $ν_τ$ -- to constrain this evolution, both phenomenologically and within dimension-6 Standard Model Effective Field Theory. We account for astrophysical uncertainties -- an unavoidable requirement to obtain realistic results, even though this weakens the bounds. Although present IceCube measurements lack the sensitivity to detect this running, we forecast that upcoming multi-detector combinations will place unprecedented bounds on the high-energy evolution of neutrino mixing. |
| title | Astrophysical bounds on the high-energy evolution of neutrino mixing |
| topic | High Energy Physics - Phenomenology High Energy Astrophysical Phenomena High Energy Physics - Experiment High Energy Physics - Theory |
| url | https://arxiv.org/abs/2604.14409 |