OUTP-12-17P Bonn-TH-2012-20 Enhanced h>yy rate in MSSM singlet extensions Kai Schmidt-Hoberg,Florian Staub a Rudolf Peierls Centre for Theoretical Physics,University of Orford, 1 Keble Road,Ozford OX1 3NP,UK 81261060m bBethe Center for Theoretical Physics Physikalisches Institut der Universitat Bonn, NuBallee 12,53115 Bonn,Germany Abstract We study the di-photon rate in Higgs decays within singlet extensions of the supersymmetric standard model.In particular we point out that light charginos as well as a light charged Higgs can significantly contribute to the corresponding partial decay width,allowing for an explanation of the experimental indication whithin a natural supersymmetric model.This is in contrast to the 'light stau scenario'proposed within the framework of the MSSM which requires a large amount of electroweak fine tuning. ZAE89I 807I:AIXIeOUTP-12-17P Bonn-TH-2012-20 Enhanced h → γγ rate in MSSM singlet extensions Kai Schmidt-Hoberga , Florian Staubb aRudolf Peierls Centre for Theoretical Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UK bBethe Center for Theoretical Physics & Physikalisches Institut der Universit¨at Bonn, Nußallee 12, 53115 Bonn, Germany Abstract We study the di-photon rate in Higgs decays within singlet extensions of the supersymmetric standard model. In particular we point out that light charginos as well as a light charged Higgs can significantly contribute to the corresponding partial decay width, allowing for an explanation of the experimental indication whithin a natural supersymmetric model. This is in contrast to the ‘light stau scenario’ proposed within the framework of the MSSM which requires a large amount of electroweak fine tuning. arXiv:1208.1683v2 [hep-ph] 16 Oct 2012