Eur. Phys. J. C (2009) 61: 899-903
https://doi.org/10.1140/epjc/s10052-009-0895-4

Regular Article - Experimental Physics

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

¹ Department of Technology, CIEMAT, Madrid, Spain
² Gesellschaft für Schwerionenforschung mbH, Darmstadt, Germany
³ CEADEN, Ciudad Habana, Cuba

^* e-mail: pedro.ladron@ciemat.es

Received: 12 September 2008
Revised: 16 January 2009
Published online: 12 February 2009

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.