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arXiv · 1510.07691

ATLAS on-Z Excess via gluino-Higgsino-singlino decay chains in the NMSSM

Keisuke Harigaya·Masahiro Ibe·Teppei Kitahara
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Abstract

Recently the ATLAS experiment has reported 3.0 sigma 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 $\tilde{g} \to g \tildeχ^0_{2,3} \to g Z \tildeχ^0_{1}$ where $\tildeχ^0_{2,3}$ and $\tildeχ^0_1$ 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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Keisuke Harigaya, Masahiro Ibe, Teppei Kitahara. 2015-10-26. ATLAS on-Z Excess via gluino-Higgsino-singlino decay chains in the NMSSM. https://doi.org/10.1007/jhep01(2016)030

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