Search for exotic long-lived particles at CLIC

A study of the sensitivity of the CLIC_ILD detector model for massive long-lived particles produced in the decay of the Higgs boson is presented, using a data sample of e+e− collisions at $\sqrt{s}$ = 350 GeV and $\sqrt{s}$ = 3 TeV, corresponding to an integrated luminosity of 1 ab$^{−1}$ and 3 ab$^{−1}$, respectively. The sensitivity range covers long-lived particle lifetimes from 1 to 300 ps, masses between 25 and 50 GeV, and a parent Higgs mass of 126 GeV. Sensitivities to the production cross-section as a function of the long-lived particle mass and lifetime are determined.