Hadronic resonance production in pp and Pb-Pb collisions at LHC with the ALICE experiment

Resonances, with their lifetimes comparable to that of the fireball, can be used to estimate the time span and hadronic interaction cross section in the phase between chemical and kinetic freeze-out. In pp collisions, measurements of resonances provide an important baseline for heavy-ion data and allow for the tuning of QCD-inspired particle production models. The ALICE collaboration measured K* (892)(0) and phi(1020) production, both in pp collisions at root s=7 TeV and in Pb-Pb collisions at root s(NN)=2.76 TeV. The inelastic yield of Sigma(1385)(+/-) in pp collision at root s=7 TeV was also measured. Transverse momentum spectra, ratios to stable particles and a comparison between central and peripheral production are shown.