Updated bounds on the (1, 2) neutrino oscillation parameters after first JUNO results
4 affiliations
- 1Istituto Nazionale di Fisica Nucleare (INFN), Laboratori Nazionali del Gran Sasso
- 2Università degli Studi dell’Aquila
- 3Istituto Nazionale di Fisica Nucleare, Sezione di Bari
- 4University of Bari Aldo Moro
Abstract
Within the standard 3 ν framework, we discuss updated bounds on the leading oscillation parameters related to the ( ν 1 , ν 2 ) states, namely, the squared mass difference δ m 2 = m 2 2 − m 1 2 and the mixing parameter sin 2 θ 12 . A previous global analysis of 2024 oscillation data estimated δ m 2 and sin 2 θ 12 with fractional 1 σ errors of about 2.3% and 4.5%, respectively. First we update the analysis by applying the latest SNO+ (Sudbury Neutrino Observatory Plus) constraints that slightly shift the ( δ m 2 , sin 2 θ 12 ) best fits. Then we apply the constraints placed by the first Jiangmen Underground Neutrino Observatory results that significantly reduce the uncertainties of both parameters. Our updated global bounds (as of 2025) can be summarized in terms of a bivariate Gaussian as: δ m 2 / 10 − 5 eV 2 = 7.48 ± 0.10 and sin 2 θ 12 = 0.3085 ± 0.0073 (with error correlation ρ = − 0.20 ), corresponding to 1 σ uncertainties as small as 1.3% and 2.4%, respectively. We also comment on minor physical and statistical effects that, in the future, may contribute to lift the current mass-ordering degeneracy of ( δ m 2 , θ 12 ) estimates.
Related
- Quantifying Information Hierarchy for Neutrino Oscillation Parameters at JUNO
- Measurement of Neutrino Oscillation Parameters at JUNO and Indication of the Neutrino Mass Ordering
- Measurement of reactor neutrino oscillation with the first JUNO data
- A Bayesian approach to the long-baseline neutrino oscillation sensitivity of DUNE
- CP-violation or Nuclear Excitation: Reviewing the Role of Neutrino Interaction Model Uncertainties on Accelerator-Based Neutrino Oscillation Measurements
BibTeX
@article{anonymous2026updated,
title = {{Updated bounds on the (1, 2) neutrino oscillation parameters after first JUNO results}},
author = {Anonymous and E. Lisi and Francesco Marcone and A. Marrone and Antonio Palazzo},
journal = {Physical review. D/Physical review. D.},
year = {2026},
month = jun,
doi = {10.1103/cxqw-1bty},
url = {https://doi.org/10.1103/cxqw-1bty},
note = {CC BY},
}
RIS
TY - JOUR
TI - Updated bounds on the (1, 2) neutrino oscillation parameters after first JUNO results
AU - Anonymous
AU - E. Lisi
AU - Francesco Marcone
AU - A. Marrone
AU - Antonio Palazzo
PY - 2026
DA - 2026/06/25
JO - Physical review. D/Physical review. D.
DO - 10.1103/cxqw-1bty
UR - https://doi.org/10.1103/cxqw-1bty
AB - Within the standard 3 ν framework, we discuss updated bounds on the leading oscillation parameters related to the ( ν 1 , ν 2 ) states, namely, the squared mass difference δ m 2 = m 2 2 − m 1 2 and the mixing parameter sin 2 θ 12 . A previous global analysis of 2024 oscillation data estimated δ m 2 and sin 2 θ 12 with fractional 1 σ errors of about 2.3% and 4.5%, respectively. First we update the analysis by applying the latest SNO+ (Sudbury Neutrino Observatory Plus) constraints that slightly shift the ( δ m 2 , sin 2 θ 12 ) best fits. Then we apply the constraints placed by the first Jiangmen Underground Neutrino Observatory results that significantly reduce the uncertainties of both parameters. Our updated global bounds (as of 2025) can be summarized in terms of a bivariate Gaussian as: δ m 2 / 10 − 5 eV 2 = 7.48 ± 0.10 and sin 2 θ 12 = 0.3085 ± 0.0073 (with error correlation ρ = − 0.20 ), corresponding to 1 σ uncertainties as small as 1.3% and 2.4%, respectively. We also comment on minor physical and statistical effects that, in the future, may contribute to lift the current mass-ordering degeneracy of ( δ m 2 , θ 12 ) estimates.
SN - 2470-0010
SN - 2470-0029
SN - 2470-0037
ER -