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Excess Higgs production in neutralino decays

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Abstract

The ATLAS and CMS experiments have recently claimed discovery of a Higgs boson-like particle at ~5σ confidence and are beginning to test the Standard Model predictions for its production and decay. In a variety of supersymmetric models, a neutralino NLSP can decay dominantly to the Higgs and the LSP. In natural SUSY models, a light third generation squark decaying through this chain can lead to large excess Higgs production while evading existing BSM searches. Such models can be observed at the 8 TeV LHC in channels exploiting the rare diphoton decays of the Higgs produced in the cascade decay. Identifying a diphoton resonance in association with missing energy, a lepton, or b-tagged jets is a promising search strategy for discovery of these models, and would immediately signal new physics involving production of a Higgs boson. We also discuss the possibility that excess Higgs production in these SUSY decays can be responsible for enhancements of up to 50% over the SM prediction for the observed rate in the existing inclusive diphoton searches, a scenario which would likely by the end of the 8 TeV run be accompanied by excesses in the γγ + ℓ/MET and SUSY multi-lepton/b searches and a potential discovery in a γγ + 2b search.

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  1. Stanford Institute for Theoretical Physics, Department of Physics, Stanford University, Stanford, CA, 94305, USA

    Kiel Howe & Prashant Saraswat

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  1. Kiel Howe
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  2. Prashant Saraswat
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Correspondence to Prashant Saraswat.

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Howe, K., Saraswat, P. Excess Higgs production in neutralino decays. J. High Energ. Phys. 2012, 65 (2012). https://doi.org/10.1007/JHEP10(2012)065

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