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Beyond the standard seesaw: neutrino masses from Kähler operators and broken supersymmetry

  • Andrea BrignoleEmail author
  • Filipe R. Joaquim
  • Anna Rossi
Open Access
Article

Abstract

We investigate supersymmetric scenarios in which neutrino masses are generated by effective d = 6 operators in the Kähler potential, rather than by the standard d = 5 superpotential operator. First, we discuss some general features of such effective operators, also including SUSY-breaking insertions, and compute the relevant renormalization group equations. Contributions to neutrino masses arise at low energy both at the tree level and through finite threshold corrections. In the second part we present simple explicit realizations in which those Kähler operators arise by integrating out heavy SU(2) W triplets, as in the type II seesaw. Distinct scenarios emerge, depending on the mechanism and the scale of SUSY-breaking mediation. In particular, we propose an appealing and economical picture in which the heavy seesaw mediators are also messengers of SUSY breaking. In this case, strong correlations exist among neutrino parameters, sparticle and Higgs masses, as well as lepton flavour violating processes. Hence, this scenario can be tested at high-energy colliders, such as the LHC, and at lower energy experiments that measure neutrino parameters or search for rare lepton decays.

Keywords

Supersymmetry Breaking Neutrino Physics Supersymmetric Standard Model Rare Decays 

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© The Author(s) 2010

Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • Andrea Brignole
    • 1
    Email author
  • Filipe R. Joaquim
    • 2
  • Anna Rossi
    • 3
  1. 1.INFN, Sezione di PadovaPaduaItaly
  2. 2.CERN, Theory DivisionGeneva 23Switzerland
  3. 3.Dipartimento di Fisica “G. Galilei”Università di PadovaPaduaItaly

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