58. International Winter Meeting on Nuclear Physics

Latest results on the production of hadronic resonances with ALICE at the LHC

21 Jan 2020, 18:20

20m

Bormio, Italy

Overview Talk Tuesday Afternoon

Speaker

NEELIMA AGRAWAL (Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche , Rome, Italy)

Description

The study of hadronic resonances by the ALICE experiment is of special importance in order to disentangle the hadronic final-state effects in relativistic heavy-ion collisions at the LHC. Short-lived hadronic resonances are sensitive probes of the dynamics and properties of the medium formed after hadronisation. Due to their short lifetimes, they decay when the system is still dense and the decay products scatter in the hadron gas. Possible interaction mechanisms inside the hadronic medium involve the competing processes of hadron re-scattering and re-generation, which can have a strong influence on the shapes of the $p_{\mathrm{T}}$ spectra and on the re-constructible total yields.

The ALICE experiment has measured the production of a rich set of hadronic resonances such as $\rho (770{)}^0$, $K^{\ast }(892)$, $\varphi (1020)$, $\mathrm{\Sigma }(1385{)}^{\pm }$, $\mathrm{\Lambda }(1520)$ and $\mathrm{\Xi }(1530{)}^0$, in pp, p-Pb and Pb-Pb collisions at various energies at the LHC. A comprehensive overview of the latest results will be presented. Transverse momentum spectra, mean transverse momenta and total yield production ratios to stable particles will be presented as a function of charged particle multiplicity/centrality and collision energies. Comparisons with the predictions from various statistical hadronisation models, Monte Carlo event generators like EPOS3 with UrQMD as an afterburner will also be discussed.

Presentation materials

[20200122]Agrawal_Bormio.pdf