Beyond the standard seesaw: neutrino masses from Kahler operators and broken supersymmetry
arXiv:1007.1942 · doi:10.1007/JHEP08(2010)133
Abstract
We investigate supersymmetric scenarios in which neutrino masses are generated by effective d=6 operators in the Kahler 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 Kahler 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.
LaTeX, 34 pages; some corrections in Section 4
References in corpus (11)
- Flavour physics of leptons and dipole moments
- Low energy effects of neutrino masses
- Various definitions of Minimal Flavour Violation for Leptons
- MSSM with Dimension-five Operators (MSSM_5)
- Gauge and Yukawa mediated supersymmetry breaking in the triplet seesaw scenario
- Phenomenology of the triplet seesaw mechanism with Gauge and Yukawa mediation of SUSY breaking
- Seesaw mechanism in the sneutrino sector and its consequences
- NMSSM and Seesaw Physics at LHC
- Flavour violation at the LHC: type-I versus type-II seesaw in minimal supergravity
- A Clean Slepton Mixing Signal at the LHC
- Soft SUSY breaking contributions to proton decay