Resonance measurements in pp and Pb--Pb collisions with the ALICE detector

TL;DR

This paper analyzes resonance production in pp and Pb--Pb collisions using ALICE detector data, providing insights into hadronization, QCD models, and fireball evolution, with a focus on transverse momentum spectra of specific resonances.

Contribution

It presents detailed measurements of resonance spectra in pp collisions at 7 TeV and compares them with Monte Carlo models, highlighting discrepancies especially for $ ext{x}^*$ resonances.

Findings

Monte Carlo models vary in agreement with measured spectra.

$ ext{x}^*$ resonance spectra are consistently underestimated by models.

Transverse momentum spectra provide insights into hadronization and fireball evolution.

Abstract

The study of resonance production in pp collisions helps understanding hadronization mechanisms and tuning the QCD-inspired particle production models. In Pb--Pb collisions, resonances allow one to probe the temperature and time evolution of the fireball. Transverse momentum spectra have been analyzed for $\kstar$, $\phir$ and $\xstar$ resonances using data from pp collisions at 7 TeV collected by the ALICE detector. A comparison with Monte Carlo event generators shows different levels of agreement for meson spectra, while $\xstar$ is always underestimated.