Probing the hadronic phase with resonances of different lifetimes in Pb-Pb collisions with ALICE

Abstract

The ALICE experiment has measured the production of a rich set of hadronic resonances, such as $\rho (770{)}^0$, ${\mathrm{K}}^{\ast }(892{)}^0$, $\varphi$(1020), ${\Sigma }^{\pm }$(1385), $\Lambda (1520)$ and ${\Xi }^{\ast 0}$ in pp, p-Pb and Pb-Pb collisions at various energies at the LHC. A comprehensive overview and the latest results are presented in this paper. Special focus is given to the role of hadronic resonances for the study of final-state effects in high-energy collisions. In particular, the measurement of resonance production in heavy-ion collisions has the capability to provide insight into the existence of a prolonged hadronic phase after hadronisation. The observation of the suppression of the production of $\Lambda (1520)$ resonance in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV adds further support to the existence of such a dense hadronic phase, as already evidenced by the ratios ${\mathrm{K}}^{\ast }(892{)}^0$/$\mathrm{K}$ and $\rho (770{)}^0$/$\pi$.

4 pages, 3 figures, 17th International Conference on Strangeness in Quark Matter (SQM 2017)

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• Hadronic resonance production and interaction in p-Pb collisions at LHC energies in EPOS3