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Repressing anarchy in neutrino mass textures

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  • Published: 23 November 2012
  • Volume 2012, article number 139, (2012)
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Repressing anarchy in neutrino mass textures
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  • Guido Altarelli1,2,
  • Ferruccio Feruglio3,
  • Isabella Masina4,5 &
  • …
  • Luca Merlo6,7 

  • 605 Accesses

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Abstract

The recent results that θ 13 is relatively large, of the order of the previous upper bound, and the indications of a sizable deviation of θ 23 from the maximal value are in agreement with the predictions of Anarchy in the lepton sector. The quark and charged lepton hierarchies can then be reproduced in a SU(5) GUT context by attributing non-vanishing U(1)FN charges, different for each family, only to the SU(5) tenplet states. The fact that the observed mass hierarchies are stronger for up quarks than for down quarks and charged leptons supports this idea. As discussed in the past, in the flexible context of SU(5) ⊗ U(1)FN, different patterns of charges can be adopted going from Anarchy to various types of hierarchy. We revisit this approach by also considering new models and we compare all versions to the present data. As a result we confirm that, by relaxing the ansatz of equal U(1)FN charges for all SU(5) pentaplets and singlets, better agreement with the data than for Anarchy is obtained without increasing the model complexity. We also present the distributions obtained in the different models for the Dirac CP-violating phase. Finally we discuss the relative merits of these simple models.

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Author information

Authors and Affiliations

  1. Dipartimento di Fisica “E. Amaldi”, Università di Roma Tre, INFN Sezione di Roma Tre, I-00146, Rome, Italy

    Guido Altarelli

  2. CERN, Department of Physics, Theory Division, CH-1211, Geneva 23, Switzerland

    Guido Altarelli

  3. Dipartimento di Fisica e Astronomia “G. Galilei”, Università di Padova, INFN — Sezione di Padova, Via Marzolo 8, I-35131, Padua, Italy

    Ferruccio Feruglio

  4. Dipartimento di Fisica dell’Università di Ferrara, INFN — Sezione di Ferrara, Via Saragat 1, I-44100, Ferrara, Italy

    Isabella Masina

  5. CP3-Origins and DIAS, SDU University, Campusvej 55, DK-5230, Odense M, Denmark

    Isabella Masina

  6. Physik-Department, Technische Universität München, James-Franck-Strasse, D-85748, Garching, Germany

    Luca Merlo

  7. TUM Institute for Advanced Study, Technische Universität München, Lichtenbergstrasse 2a, D-85748, Garching, Germany

    Luca Merlo

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  1. Guido Altarelli
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  2. Ferruccio Feruglio
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  3. Isabella Masina
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  4. Luca Merlo
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Corresponding author

Correspondence to Isabella Masina.

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Altarelli, G., Feruglio, F., Masina, I. et al. Repressing anarchy in neutrino mass textures. J. High Energ. Phys. 2012, 139 (2012). https://doi.org/10.1007/JHEP11(2012)139

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  • Received: 06 July 2012

  • Revised: 14 September 2012

  • Accepted: 05 November 2012

  • Published: 23 November 2012

  • DOI: https://doi.org/10.1007/JHEP11(2012)139

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Keywords

  • Neutrino Physics
  • Beyond Standard Model
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