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Recent LHC data suggest an excess in the Higgs decay channels into gammagamma, W W and Z Z at roughly 125 GeV. The current excess in the diphotonchannel is twice that expected from a Standard Model Higgs; whilst this maywell change with more statistics, it is interesting to consider theimplications should the result persist. Here, we assess whether the NMSSM witha neutralino dark matter candidate could explain this excess when astrophysicalconstraints (e.g. no overproduction of gamma rays and radio emission in thegalaxy, no anomalous excess in the dark matter direct detection experiments andno dark matter overabundance) are imposed on the neutralino. This enables us todisregard unphysical regions of the parameter space even though the Higgssignal is compatible with the observed excess. The result of our analysis isthat there are configurations of the parameter space which can explain thesignal strength reported by the ATLAS and CMS collaborations for a Higgs masswithin the required range. Should the observed signal strength finally becompatible with Standard Model expectations, it would be difficult todistinguish between the discovery of Standard Model Higgs and a SM-like Higgsfrom the NMSSM, unless one performs dedicated searches of very light Higgsbosons and possibly investigate peculiar signatures of supersymmetricparticles. We also propose a new jets + missing E_T signal for the case wherethe LSP is a singlino-like neutralino.

The 125 GeV Higgs in the NMSSM in light of LHC results and astrophysics constraints