Hidden Valley searches at CLIC

The sensitivity studies to observe long-lived particles predicted by a set of beyond the Standard Model theoretical models are reported. The analysis is based on a data sample of $e^+e^−$ collisions at $\sqrt{s} = $3 TeV, simulated with the CLIC_ILD detector model and corresponding to an integrated luminosity of 3 ab$^{-1}$ . Long-lived particle decay products are subsequently combined to reconstruct the parent bosons employing secondary vertices displaced from the beam axis. The upper limits on the production cross section for the long-lived particle lifetimes from 1 to 300 ps, masses between 25 and 50 GeV/c$^2$ , and a parent Higgs mass of 126 GeV/c$^2$ are determined.