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arXiv · 2210.11699

Investigating the cluster production mechanism with isospin triggering: Thermal models versus coalescence models

Apiwit Kittiratpattana·Tom Reichert·Pengcheng Li·Ayut Limphirat·Christoph Herold·Jan Steinheimer·Marcus Bleicher
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Abstract

Isospin triggering allows to distinguish coalescence from thermal production of light clusters in heavy ion collisions. Triggering on $Y(\pi^-) - Y(\pi^+)$ allows to select very neutron or proton rich final states. The deuteron (cluster) production with coalescence ($d \propto n \cdot p$) leads then to an inverse parabolic dependence of the deuteron yield on $\Delta Y_{\pi}$. In contrast, in a thermal model, cluster production is independent on $\Delta Y_{\pi}$. The observation of a maximum deuteron (cluster) yield as function of $\Delta Y_{\pi}$ provides confirmation of the coalescence mechanism.

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Apiwit Kittiratpattana, Tom Reichert, Pengcheng Li, Ayut Limphirat, Christoph Herold, Jan Steinheimer, Marcus Bleicher. 2022-10-21. Investigating the cluster production mechanism with isospin triggering: Thermal models versus coalescence models. https://doi.org/10.1103/physrevc.107.044911

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