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Bulk neutrinos as an alternative cause of the gallium and reactor anti-neutrino anomalies

P. A. N. Machado1,2,*, H. Nunokawa3,†, F. A. Pereira dos Santos3,‡, and R. Zukanovich Funchal1,§

  • 1Instituto de Física, Universidade de São Paulo, C. P. 66.318, 05315-970 São Paulo, Brazil
  • 2Institut de Physique Théorique, CEA-Saclay, 91191 Gif-sur-Yvette, France
  • 3Departamento de Física, Pontifícia Universidade Católica do Rio de Janeiro, C. P. 38071, 22452-970, Rio de Janeiro, Brazil

  • *accioly@fma.if.usp.br
  • †nunokawa@puc-rio.br
  • ‡fabio.alex@fis.puc-rio.br
  • §zukanov@if.usp.br
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Phys. Rev. D 85, 073012 – Published 20 April, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.073012

Abstract

We consider an alternative explanation for the deficit of νe in Ga solar neutrino calibration experiments and of the ν¯e in short-baseline reactor experiments by a model where neutrinos can oscillate into sterile Kaluza-Klein modes that can propagate in compactified submicrometer flat extra dimensions. We have analyzed the results of the gallium radioactive source experiments and 19 reactor experiments with baseline shorter than 100 m, and showed that these data can be fit into this scenario. The values of the lightest neutrino mass and of the size of the largest extra dimension that are compatible with these experiments are mostly not excluded by other neutrino oscillation experiments.

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Phys. Rev. D 85, 073012– Published 20 April, 2012
  • Received 28 July 2011

© 2012 American Physical Society

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