Abstract

In this study, we perform a detailed analysis on the same-sign dilepton signature in the inert doublet model. Focusing on the low dark matter mass region, we randomly scan the corresponding parameter space. Viable samples allowed by various constraints are obtained, and among them are twenty benchmark points that are selected for further study on collider signature. At hadron colliders, the same-sign dilepton signature is produced via with the leptonic decay mode , where H represents the dark matter candidate. We investigate the testability of this signal at the high-luminosity LHC (HL-LHC) and the proposed 27 TeV high-energy LHC (HE-LHC). According to our simulation, the HL-LHC with can barely probe this signal. Meanwhile, for the HE-LHC with , it is promising to obtain a significance when GeV with dark matter mass or 71 GeV.

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