The performance of the jet identification and reconstruction in heavy ions collisions with CMS detector

A jet reconstruction algorithm is developed for events with a high particle density in the calorimetric system. The performance of the reconstruction of hard QCD jets with initial parton energies 50-300 GeV is studied in central Pb-Pb collisions with a modified cone jet finder which includes an algorithm for event-by-event background subtraction. The heavy ion background is simulated using the HIJING Monte Carlo generator with dN(ch)/dy vertical bar(y=0) = 5000. Results on the achieved jet reconstruction efficiency, purity, energy and spatial resolution are presented.