Speaker
Description
Recently, ALICE observed that the production of the short-lived resonance $K^*(892)$ is reduced in high multiplicity pp collisions compared to its ground state $K^\pm$, while long-lived resonances like $\phi(1020)$ exhibit no multiplicity dependence. This reduction is attributed to the decay product undergoing hadronic interactions within the hadron gas phase. This phenomenon, termed rescattering, is extensively studied in Pb-Pb collisions. However, recent results indicate the possible existence of hadronic interactions, such as the rescattering effect, even in small systems such as pp. Therefore, it becomes crucial to consistently predict the multiplicity-dependent suppression of resonance production across various collision systems, including small systems. Theoretical models such as EPOS have successfully elucidated this phenomenon in Pb-Pb collisions, particularly when coupled with UrQMD, which incorporates hadronic interactions. Thus, this presentation aims to showcase the reproducibility of ALICE measurements of $\phi(1020)$ and $K^*(892)$ in pp collisions, employing the EPOS4 and UrQMD models. Additionally, it presents the results of other resonances, $\rho(770)^0$, $\Delta^{++}(1232)$, $\Sigma^{\pm}(1385)$, $\Lambda(1520)$ and $\Xi(1530)^0$. These findings enhance our comprehension of hadronic interactions within small systems, thereby offering valuable insights into the hadronic phase.