A Study of e+e− → H0A0 → bbbb at 3 TeV at CLIC

The precise determination of the masses of the CP-odd and -even heavy Higgs bosons is an important part of the study of Supersymmetry and its relation with cosmology through dark matter. This note presents a determination of the A0 mass with the e+e− → H0A0 → bb ̄bb ̄ process for a dark matter motivated cMSSM scenario with MA = 1141 GeV at CLIC. The analysis is performed with full simulation and reconstruction at √s=3 TeV accounting for beamstrahlung effects. SM and SUSY backgrounds are considered and the effect of the overlay of γγ → hadrons events on the signal is studied for various assumptions for the detector time-stamping capabilities. The di-jet mass resolution is improved by applying a kinematic fit. The A0 mass can be determined with a statistical accuracy of ≃ 3-5 GeV for 3 ab−1 of integrated luminosity and 0 to 20 bunch crossings of γγ background integrated in one event, respectively.