Status of four-neutrino mass schemes: a global and unified approach to current neutrino oscillation data

Abstract

We present a unified global analysis of neutrino oscillation data within the framework of the four-neutrino mass schemes (3+1) and (2+2). We include all data from solar and atmospheric neutrino experiments, as well as information from short-baseline experiments including LSND. If we combine only solar and atmospheric neutrino data, (3+1) schemes are clearly preferred, whereas short-baseline data in combination with atmospheric data prefers (2+2) models. When combining all data in a global analysis the (3+1) mass scheme gives a slightly better fit than the (2+2) case, though all four-neutrino schemes are presently acceptable. The LSND result disfavors the three-active neutrino scenario with only $\Delta m_{sol}^2$ and $\Delta m_{atm}^2$ at 99.9% CL with respect to the four-neutrino best fit model. We perform a detailed analysis of the goodness of fit to identify which sub-set of the data is in disagreement with the best fit solution in a given mass scheme.

32 pages, 8 Figures included, REVTeX4.Improved discussion in sec. XI, references added, version accepted by Phys. Rev. D

References in corpus (19)

• Measurement of the rate of nu_e + d --> p + p + e^- interactions produced by 8B solar neutrinos at the Sudbury Neutrino Observatory
• Evidence for Neutrino Oscillations from the Observation of Electron Anti-neutrinos in a Muon Anti-Neutrino Beam
• Solar 8B and hep Neutrino Measurements from 1258 Days of Super-Kamiokande Data
• Constraints on Neutrino Oscillations Using 1258 Days of Super-Kamiokande Solar Neutrino Data
• Final results from the Palo Verde Neutrino Oscillation Experiment
• Global Analysis of Solar Neutrino Oscillations Including SNO CC Measurement
• Unknowns after the SNO Charged-Current Measurement
• Neutrino Mass Spectrum and Future Beta Decay Experiments
• Frequentist analyses of solar neutrino data (updated including KamLAND and SNO data)
• 4-Neutrino mass schemes and the likelihood of (3+1)-mass spectra
• Majorana Neutrinos, Neutrino Mass Spectrum, CP-Violation and Neutrinoless Double Beta-Decay: II. Mixing of Four Neutrinos
• Global Analysis with SNO: Toward the Solution of the Solar Neutrino Problem
• Solar and Atmospheric Four-Neutrino Oscillations
• Cornering (3+1) sterile neutrino schemes
• Bayesian View Of Solar Neutrino Oscillations
• The 2+2 and 3+1 Four-Family Neutrino Mixing at the Neutrino Factory
• Large Lepton Mixings Induced by Sterile Neutrino
• L_e + L_μ- L_τ- L_s Symmetry and a Mixed 2+2 Scenario for Neutrino Oscillations
• Neutrino Anomalies and Quasi-Dirac neutrinos

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