Abstract
The present status and the future of hadron production characterization in Pb–Pb collisions at LHC by measuring the p T dependence of baryon over meson ratios is presented. The current RHIC and LHC results showing a strong enhancement of the Λ/K S 0 ratio in Pb–Pb collisions with respect to proton-proton collisions at intermediate p T and their interpretation in terms of coalescence processes are discussed. A crucial extension of these studies to heavy flavor hadrons (D, B mesons and Λ c , Λ b baryons) will be enabled by the foreseen reforging of the ALICE Inner Tracking System (ITS). The main performance objectives and technological ingredients of the ITS upgrade are summarized.
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