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Curtailing the dark side in non-standard neutrino interactions

Coloma, Pilar; Denton, Peter B.; Gonzalez-Garcia, M. C.; Maltoni, Michele; Schwetz, Thomas

In presence of non-standard neutrino interactions the neutrino avor evolution equation is affected by a degeneracy which leads to the so-called LMA-Dark solution. It requires a solar mixing angle in the second octant and implies an ambiguity in the neutrino mass ordering. Non-oscillation experiments are required to break this degeneracy. We perform a combined analysis of data from oscillation experiments with the neutrino scattering experiments CHARM and NuTeV. We find that the degeneracy can be lifted if the non-standard neutrino interactions take place with down quarks, but it remains for up quarks. However, CHARM and NuTeV constraints apply only if the new interactions take place through mediators not much lighter than the electroweak scale. For light mediators we consider the possibility to resolve the degeneracy by using data from future coherent neutrino-nucleus scattering experiments. We find that, for an experiment using a stoppedpion neutrino source, the LMA-Dark degeneracy will either be resolved, or the presence of new interactions in the neutrino sector will be established with high significance.

Zugehörige Institution(en) am KIT Institut für Kernphysik (IKP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.1007/JHEP04(2017)116
ISSN: 1029-8479, 1126-6708
URN: urn:nbn:de:swb:90-695710
KITopen ID: 1000069571
HGF-Programm 51.03.06; LK 01
Erschienen in Journal of high energy physics
Band 116
Seiten Art. Nr. JHEP04
Schlagworte Neutrino Physics, Beyond Standard Model
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