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Updated global fit to three neutrino mixing: status of the hints of θ 13 > 0

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Abstract

We present an up-to-date global analysis of solar, atmospheric, reactor and accelerator neutrino data in the framework of three-neutrino oscillations. We discuss in detail the statistical significance of the observed “hint” of non-zero θ 13 in the solar sector at the light of the latest experimental advances, such as the Borexino spectral data, the lower value of Gallium rate recently measured in SAGE, and the low energy threshold analysis of the combined SNO phase I and phase II. We also study the robustness of the results under changes of the inputs such as the choice of solar model fluxes and a possible modification of the Gallium capture cross-section as proposed by SAGE. In the atmospheric sector we focus on the latest results for ν e appearance from MINOS and on the recent Super-Kamiokande results from the combined phases I, II and III, and we discuss their impact on the determination of θ 13. Finally, we combine all the data into a global analysis and determine the presently allowed ranges of masses and mixing.

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Authors and Affiliations

  1. C.N. Yang Institute for Theoretical Physics, State University of New York at Stony Brook, Stony Brook, NY, 11794-3840, U.S.A.

    M. C. Gonzalez-Garcia

  2. Institució Catalana de Recerca i Estudis Avançats (ICREA), Departament d’Estructura i Constituents de la Matèria and Institut de Ciencies del Cosmos, Universitat de Barcelona, Diagonal 647, E-08028, Barcelona, Spain

    M. C. Gonzalez-Garcia

  3. Instituto de Física Teórica UAM/CSIC, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, E-28049, Madrid, Spain

    Michele Maltoni

  4. Departament d’Estructura i Constituents de la Matèria and Institut de Ciencies del Cosmos, Universitat de Barcelona, 647 Diagonal, E-08028, Barcelona, Spain

    Jordi Salvado

Authors
  1. M. C. Gonzalez-Garcia
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  2. Michele Maltoni
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  3. Jordi Salvado
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Correspondence to Michele Maltoni.

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ArXiv ePrint: 1001.4524

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Gonzalez-Garcia, M.C., Maltoni, M. & Salvado, J. Updated global fit to three neutrino mixing: status of the hints of θ 13 > 0. J. High Energ. Phys. 2010, 56 (2010). https://doi.org/10.1007/JHEP04(2010)056

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  • DOI: https://doi.org/10.1007/JHEP04(2010)056

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