Energy and multiplicity dependence of hadronic resonance production with ALICE at the LHC

TL;DR

This paper presents measurements of short-lived hadronic resonances in various collision systems at the LHC, providing insights into their production, medium effects, and potential collective phenomena in high-energy collisions.

Contribution

It offers new experimental results on resonance production across different systems and energies, enhancing understanding of medium effects and baseline data for heavy-ion studies.

Findings

Resonance yields vary with system size and energy.

Evidence of medium modifications in heavy-ion collisions.

Baseline measurements in pp collisions for future heavy-ion analyses.

Abstract

The study of hadronic resonances plays an important role both in pp and in heavy-ion collisions. Since the lifetimes of short-lived resonances are comparable with the lifetime of the fireball formed in heavy-ion collisions, regeneration and re-scattering effects can modify the measured yields, especially at low transverse momentum. Measurements in pp collisions at different energies constitute a baseline for studies in heavy-ion collisions and provide constraints for tuning QCD-inspired event generators. Furthermore, high multiplicity pp collisions, where the density and the volume of the system are expected to be larger compared to minimum bias pp collisions, can help in the search for the onset of collective phenomena. Here we present recent results on short-lived hadronic resonances obtained by the ALICE experiment at LHC energies in different collision systems (pp, p-Pb~and Pb-Pb) including new results obtained in Xe-Xe~collisions. The ALICE results on transverse momentum spectra, yields and their ratios to long-lived particles will be discussed.