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Paper   IPM / P / 15441
School of Physics
  Title:   Activating the fourth neutrino of the 3+1 scheme
1.  P. B. Denton
2.  Y. Farzan
3.  I. M. Shoemaker
  Status:   Published
  Journal: Phys. Rev. D
  No.:  3
  Vol.:  99
  Year:  2019
  Pages:   035003
  Supported by:  IPM
Non-Standard Interactions (NSI) of neutrinos with matter has received renewed interest in recent years. In particular, it has been shown that NSI can reconcile the 3+1 solution with IceCube atmospheric data with Eν > 500 GeV, provided that the effective coupling of NSI is large, e.g.  ∼ 6 GF. The main goal of the present paper is to show that contrary to intuition, it is possible to build viable models with large NSI by invoking a new U(1) gauge symmetry with gauge boson of mass  ∼ 10 eV. We refer to these new constructions as 3+1+ U(1) models. In the framework of a 3+1 solution to LSND and MiniBooNE anomalies, we show that this novel NSI can help to solve the tension with cosmological bounds and constraints from IceCube atmospheric data with Eν > 500 GeV. We then discuss the implications of the MINOS and MINOS+ results for the 3+1+U(1) scenario.

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