Abstract
We study the decay of a standard model-like Higgs boson into a gravitino and a neutralino, which subsequently decays promptly into another gravitino and a photon. Such a decay can be important in scenarios where the supersymmetry breaking scale is of the order of a few TeV, and in the region of low transverse momenta of the photon, it may provide the dominant contribution to the final state with a photon and two gravitinos. We estimate the relevant standard model backgrounds and the prospects for discovering this Higgs decay through a photon and missing transverse energy signal at the LHC in terms of a simplified model. By promoting the standard MSSM soft terms to supersymmetric operators, involving a dynamical goldstino supermultiplet, the parameters of the simplified model are related to the MSSM parameters and the estimated discovery limits are used in order to constrain the parameter space. We show that it is possible to accommodate a SM- like CP-even neutral Higgs particle with a mass of 125 GeV, without requiring substantial radiative corrections, and with couplings sufficiently large for a signal discovery through the above mentioned Higgs decay channel with the upcoming data from the LHC.
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Petersson, C., Romagnoni, A. & Torre, R. Higgs decay with monophoton + signature from low scale supersymmetry breaking. J. High Energ. Phys. 2012, 16 (2012). https://doi.org/10.1007/JHEP10(2012)016
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DOI: https://doi.org/10.1007/JHEP10(2012)016