Journal of High Energy Physics

, 2012:105 | Cite as

Constrained SUSY seesaws with a 125 GeV Higgs

  • M. Hirsch
  • F. R. JoaquimEmail author
  • A. Vicente
Open Access


Motivated by the ATLAS and CMS discovery of a Higgs-like boson with a mass around 125 GeV, and by the need of explaining neutrino masses, we analyse the three canonical SUSY versions of the seesaw mechanism (type I, II and III) with CMSSM boundary conditions. In type II and III cases, SUSY particles are lighter than in the CMSSM (or the constrained type I seesaw), for the same set of input parameters at the universality scale. Thus, to explain \( {m_{{{h^0}}}}\simeq 125 \) GeV at low energies, one is forced into regions of parameter space with very large values of m 0, M 1/2 or A 0. We compare the squark and gluino masses allowed by the ATLAS and CMS ranges for \( {m_{{{h^{{^0}}}}}} \) (extracted from the 2011-2012 data), and discuss the possibility of distinguishing seesaw models in view of future results on SUSY searches. In particular, we briefly comment on the discovery potential of LHC upgrades, for squark/gluino mass ranges required by present Higgs mass constraints. A discrimination between different seesaw models cannot rely on the Higgs mass data alone, therefore we also take into account the MEG upper limit on BR(μ) and show that, in some cases, this may help to restrict the SUSY parameter space, as well as to set complementary limits on the seesaw scale.


Higgs Physics Rare Decays Neutrino Physics Supersymmetric Standard Model 


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Copyright information

© SISSA 2012

Authors and Affiliations

  1. 1.AHEP Group, Instituto de Física Corpuscular — C.S.I.C./Universitat de València, Edificio de Institutos de PaternaValènciaSpain
  2. 2.Departamento de Física and Centro de Física Teórica de Partículas, Instituto Superior TécnicoUniversidade Técnica de LisboaLisboaPortugal
  3. 3.Laboratoire de Physique Théorique, CNRS — UMR 8627Orsay CedexFrance

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