Sterile neutrino oscillations: the global picture

By Joachim Kopp, P. Machado, M. Maltoni, T. Schwetz. 2013

443 citations recorded by the source corpus.

A bstractNeutrino oscillations involving eV-scale neutrino mass states are investigated in the context of global neutrino oscillation data including short and long-baseline accelerator, reactor, and radioactive source experiments, as well as atmospheric and solar neutrinos. We consider sterile neutrino mass schemes involving one or two mass-squared differences at the eV2 scale denoted by 3+1, 3+2, and 1+3+1. We discuss the hints for eV-scale neutrinos from $ \mathop{{{v_e}}}\limits^{{\left( - \right)}} $ disappearance (reactor and Gallium anomalies) and $ \mathop{{{v_{\mu }}}}\limits^{{\left( - \right)}}\to \mathop{{{v_e}}}\limits^{{\left( - \right)}} $ appearance (LSND and MiniBooNE) searches, and we present constraints on sterile neutrino mixing from $ \mathop{{{v_{\mu }}}}\limits^{{\left( - \right)}} $ and neutral-current disappearance data. An explanation of all hints in terms of oscillations suffers from severe tension between appearance and disappearance data. The best compatibility is obtained in the 1+3+1 scheme with a p-value of 0.2% and exceedingly worse compatibilities in the 3+1 and 3+2 schemes.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/184538e0b9f189c34d455bb9eacc8176f150815e

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Citations in the corpus

Global Analyses of Neutrino Oscillation Experiments (2015, methodology): “Indeed, the tension between appearance and disappearance data remains severe, and a PG analysis gives a consistency below 10−4 for 3 + 2, whereas for 1 + 3 + 1 consistency at the 2 permil level can be achieved [58].”
From the Trees to the Forest: A Review of Radiative Neutrino Mass Models (2017, background): “appearance and disappearance anomalies when trying to fit both with a self-consistent oscillation scheme [32, 33], and there is a cosmological challenge of devising a mechanism to prevent the activesterile transitions from thermalising the sterile neutrino in the early universe, as thermalisation wo”
Updated global analysis of neutrino oscillations in the presence of eV-scale sterile neutrinos (2018, methodology): “[11, 14, 21] to incorporate new experimental results.”
Where are we with light sterile neutrinos? (2019, unknown): “[139, 140].”
Updated fit to three neutrino mixing: status of leptonic CP violation (2014, background): “[4], where a discussion of a possible explanation in terms of sterile neutrinos is also given.”
Sterile neutrino Dark Matter (2018, background): “particles play very dierent roles in cosmology. 16Unfortunately, unitarity violation due to heavy neutrinos does not appear to be able to resolve the long-standing issues of short-baseline anomalies [107]. 15 because two mass splittings m sol and m atm have been observed. If the lightest neutrino is”
A Proposal for a Three Detector Short-Baseline Neutrino Oscillation Program in the Fermilab Booster Neutrino Beam (2015, background): “[34] (the red combined region from Figure 8, right) and Giunti et al.”
A facility to search for hidden particles at the CERN SPS: the SHiP physics case (2015, background): “3: Five-neutrino fit to all oscillations data, from [352].”
Updated fit to three neutrino mixing: exploring the accelerator-reactor complementarity (2016, methodology): “• SBL reactor data (including Daya-Bay total flux at near detector), 77 data points [38, 72].”
Non-unitarity, sterile neutrinos, and non-standard neutrino interactions (2016, background): “On the other hand, for masses below the keV scale even the beta decay searches are no longer sensitive, and the only applicable bounds are the much milder constraints stemming from the non-observation of their effects in neutrino oscillation experiments [19, 54, 55].”