Resonance Production in Heavy Ion Collisions: Suppression of $\Lambda(1520)$ and Enhancement of $\Sigma(1385)$

TL;DR

This paper models the production and suppression of specific hyperon resonances in heavy ion collisions, revealing how reaction dynamics lead to the suppression of Λ(1520) and enhancement of Σ(1385).

Contribution

It introduces a kinetic master equation approach that does not assume chemical equilibrium to study resonance yields in heavy ion collisions.

Findings

Λ(1520) yield is suppressed due to reaction dynamics.

Σ(1385) yield is enhanced through similar processes.

Reactions like Λ(1520)+π ↔ Σ* influence resonance production.

Abstract

We investigate the yield of $\Lambda(1520)$ resonance in heavy ion collisions within the framework of a kinetic master equation without the assumption of chemical equilibrium. We show that reactions such as $\Lambda(1520)+\pi \leftrightarrow \Sigma^*$ can favor $\Sigma^*$ production, thereby decreasing the $\Lambda(1520)$ yield. Within the same approach we thus find a yield enhancement for $\Sigma(1385)$ and a yield suppression for $\Lambda(1520)$.