Journal of High Energy Physics

, 2017:116

Curtailing the dark side in non-standard neutrino interactions

  • Pilar Coloma
  • Peter B. Denton
  • M. C. Gonzalez-Garcia
  • Michele Maltoni
  • Thomas Schwetz
Open Access
Regular Article - Theoretical Physics

DOI: 10.1007/JHEP04(2017)116

Cite this article as:
Coloma, P., Denton, P.B., Gonzalez-Garcia, M.C. et al. J. High Energ. Phys. (2017) 2017: 116. doi:10.1007/JHEP04(2017)116


In presence of non-standard neutrino interactions the neutrino flavor 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 stopped-pion 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.


Neutrino Physics Beyond Standard Model 
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Copyright information

© The Author(s) 2017

Authors and Affiliations

  • Pilar Coloma
    • 1
  • Peter B. Denton
    • 1
    • 2
  • M. C. Gonzalez-Garcia
    • 3
    • 4
    • 5
  • Michele Maltoni
    • 6
  • Thomas Schwetz
    • 7
  1. 1.Theoretical Physics DepartmentFermi National Accelerator LaboratoryBataviaU.S.A.
  2. 2.Niels Bohr International AcademyUniversity of Copenhagen, The Niels Bohr InstituteCopenhagenDenmark
  3. 3.Departament de Fisíca Quàntica i Astrofísica and Institut de Ciencies del CosmosUniversitat de BarcelonaBarcelonaSpain
  4. 4.Institució Catalana de Recerca i Estudis Avançats (ICREA)BarcelonaSpain
  5. 5.C.N. Yang Institute for Theoretical PhysicsStony Brook UniversityStony BrookU.S.A.
  6. 6.Instituto de Física Teórica UAM/CSICUniversidad Autónoma de MadridMadridSpain
  7. 7.Institut für Kernphysik, Karlsruher Institut für Technologie (KIT)KarlsruheGermany

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