Abstract
Recently the ATLAS experiment has reported 3.0 σ excess in an on-Z signal region in searches for supersymmetric particles. We find that the next-to-minimal supersymmetric standard model can explain this excess by the production of gluinos which mainly decay via \( \tilde{g}\to g{\tilde{\chi}}_{2,3}^0\to gZ{\tilde{\chi}}_1^0 \) where \( {\tilde{\chi}}_{2,3}^0 \) and \( {\tilde{\chi}}_1^0 \) are the Higgsino and the singlino-like neutralinos, respectively. We show that the observed dark matter density is explained by the thermal relic density of the singlino-like neutralino, simultaneously. We also discuss the searches for the Higgs sector of this scenario at the Large Hadron Collider.
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Harigaya, K., Ibe, M. & Kitahara, T. ATLAS on-Z excess via gluino-Higgsino-singlino decay chains in the NMSSM. J. High Energ. Phys. 2016, 30 (2016). https://doi.org/10.1007/JHEP01(2016)030
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DOI: https://doi.org/10.1007/JHEP01(2016)030