Simulation study of χ c →J/Ψ+γ detection with J/Ψ→e + e − in pp collisions in the ALICE experiment at LHC

Abstract

We present Monte Carlo preliminary results about the feasibility to detect the χ_c family in p-p collisions at 14 TeV in the ALICE Central Barrel at CERN LHC. The χ_c1 and χ_c2 were forced to decay in the radiative channel J/Ψ+γ→e⁺e⁻+γ and were merged with a proton-proton non-biased collision. After Monte Carlo transport and simulation of the detector response, the e⁺, e⁻ and converted γ were reconstructed and identified in the ALICE ITS, TPC and TRD detectors. Separate signals corresponding to γ from χ_c1 and from χ_c2 were observed. The position and relative weight of the fit to gaussians agreed with the input values within the statistical limits.