Observability of the heavy neutral SUSY Higgs bosons decaying into neutralinos at the LHC

A prospective study for the observability of heavy neutral Higgs bosons decaying into supersymmetric particles at the Large Hadron Collider with the CMS detector is presented. The analysis focuses on the decay of the Higgs bosons into a pair of next-to-lightest neutralinos χ₂⁰, followed by the cascade down to the lightest neutralino, χ₂ ⁰ → l⁺l^-χ₁⁰. The final state is characterized by the presence of four isolated leptons and missing transverse energy. The parameter space of the minimal supergravity model is explored and favourable regions for the observation of the A ⁰/H⁰ bosons are identified. The A⁰/H ⁰ bosons could be discovered in the 2e2μ channel in the mass region 250 ≲ m_A/H ≲ 400 GeV/c² with an integrated luminosity of 30 fb^-1.