dorsal/arxiv
View SchemaLessons from the first JUNO results
| Authors | Ivan Esteban, M. C. Gonzalez-Garcia, Michele Maltoni, Ivan Martinez-Soler, Joao Paulo Pinheiro, Thomas Schwetz |
|---|---|
| Categories | |
| ArXiv ID | 2601.09791vv1 |
| URL | https://arxiv.org/abs/2601.09791 |
| License | http://creativecommons.org/licenses/by-sa/4.0/ |
Abstract
First results from the JUNO reactor neutrino experiment already determine with world-leading precision the small neutrino squared-mass splitting $\Delta m^2_{21}$ and the mixing angle $\theta_{12}$. In this article we perform an exploratory study beyond these, taking advantage of the first JUNO data release to discuss its sensitivity to the large squared-mass splitting, $\Delta m^2_{3\ell}$. When combined with constraints from global oscillation data, this may already contain some information on the neutrino mass ordering. Indeed, we find that the combination of the complementary $\Delta m^2_{3\ell}$-determinations gives a slight preference for Normal Ordering, with a p-value for Inverted Ordering of 2%-2.6% ($2.2\sigma$-$2.3\sigma$). We study the robustness of this result with respect to potential systematic uncertainties and statistical fluctuations. Taken at face value, a full global analysis of oscillation data including the publicly available JUNO information and data leads to a preference for Normal Ordering with $\Delta\chi^2 = 4.6$ and 9.4 without and with Super-K and IceCube-24 atmospheric neutrino data, respectively.
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"abstract": "First results from the JUNO reactor neutrino experiment already determine with world-leading precision the small neutrino squared-mass splitting $\\Delta m^2_{21}$ and the mixing angle $\\theta_{12}$. In this article we perform an exploratory study beyond these, taking advantage of the first JUNO data release to discuss its sensitivity to the large squared-mass splitting, $\\Delta m^2_{3\\ell}$. When combined with constraints from global oscillation data, this may already contain some information on the neutrino mass ordering. Indeed, we find that the combination of the complementary $\\Delta m^2_{3\\ell}$-determinations gives a slight preference for Normal Ordering, with a p-value for Inverted Ordering of 2%-2.6% ($2.2\\sigma$-$2.3\\sigma$). We study the robustness of this result with respect to potential systematic uncertainties and statistical fluctuations. Taken at face value, a full global analysis of oscillation data including the publicly available JUNO information and data leads to a preference for Normal Ordering with $\\Delta\\chi^2 = 4.6$ and 9.4 without and with Super-K and IceCube-24 atmospheric neutrino data, respectively.",
"arxiv_id": "2601.09791",
"authors": [
"Ivan Esteban",
"M. C. Gonzalez-Garcia",
"Michele Maltoni",
"Ivan Martinez-Soler",
"Joao Paulo Pinheiro",
"Thomas Schwetz"
],
"categories": [
"hep-ph",
"hep-ex"
],
"license": "http://creativecommons.org/licenses/by-sa/4.0/",
"title": "Lessons from the first JUNO results",
"url": "https://arxiv.org/abs/2601.09791",
"version": "v1"
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