Study of short-lived resonances in ALICE

The study of short-lived resonances is a powerful way to investigate the collision dynamics and to understand the properties of the hot and dense matter which is produced in ultrarelativistic heavy ion collisions. In this respect the reconstruction of such resonances is also important in pp collisions, since they provide a baseline for the study of AA collisions. The ability of the ALICE detector to identify the K*(892)(0), Lambda*(1520) and phi(1020) by their hadronic decay in pp collisions at LHC energies has been investigated. Minimum bias PYTHIA events at two different colliding energies (900 GeV and 14 TeV) have been generated and fully reconstructed. An accurate study has been done on the background evaluation and on the influence of the particle identification accuracy. Moreover, global detection efficiency as a function of rapidity and transverse momentum has been evaluated.