Speaker
Description
The study of hadronic resonances provides valuable information about the final state interactions and the system evolution in ultra-relativistic nuclear collisions. Due to their short lifespan, comparable with the duration of the hadronic phase, resonances can be affected by the competing re-scattering and regeneration mechanisms. In particular, their decay daughters interact elastically with other hadrons, altering their transverse momentum ($p_{T}$) distributions and affecting the measured resonance yields. Measurements of the ratio of yields of hadronic resonances to their ground state particles across various charged-particle multiplicities provide time information between chemical and kinetic freezeout. The ALICE experiment in the LHC Run 3 is best suited for resonance measurements because of its excellent tracking and PID capabilities over a broad momentum range.
In this contribution, we present the new ALICE results on resonance production from LHC Run 3 data collected in 2022 with the upgraded ALICE detector, making use of the higher statistics compared to previous data-taking periods. The results will be compared to similar measurements from data collected during LHC Run 2. The contribution focuses on $p_{T}$ distributions of the hadronic resonances, their $p_{T}$-integrated yields, and the ratios of $p_{T}$-integrated resonance yields to those of long-lived particles. The experimental results will be compared with the available theoretical predictions, which may offer new perspectives on the underlying dynamics in the hadronic phase.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | ALICE Collaboration |
