This talk explores the current and future efforts to detect dark sector particles at the Large Hadron Collider (LHC) and its high-luminosity upgrade, the HL-LHC. Current LHC experiments have placed constraints on various dark matter models, including weakly interacting massive particles (WIMPs), axions, and hidden sectors such as dark photons. Despite no direct detections, these experiments have significantly narrowed the parameter space for these particles. The HL-LHC, with its increased luminosity and extended dataset, is expected to push these boundaries further. It will enable searches for rare and low-mass dark sector particles, improve precision measurements, and provide new avenues to explore long-lived particles. In this talk we present the most recent results from LHC experiments that explore such dark sectors by exploiting dedicated data streams and innovative usage of the detectors. We focus on the recent results obtained using the full Run-II data-set collected at the LHC and their projections at HL-LHC. The experimental strategies, such as missing energy signatures, displaced vertices, and specialized detector upgrades that will enhance dark sector searches at the HL-LHC will be the core of the presentation.
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Livia Soffi
La Sapienza University of Rome & INFN Rome
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