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

• DOI: 10.1103/physrevc.107.044911
• Publication Date: 2023-04-26T14:38:42Z
• Authors: Apiwit Kittiratpa...; Tom Reichert; Pengcheng Li; Ayut Limphirat; Christoph Herold; Jan Steinheimer; Marcus Bleicher
• Keywords: Nuclear Theory (nucl-th); 03 medical and health sciences; 0302 clinical medicine; Nuclear Theory; FOS: Physical sciences; Nuclear Experiment (nucl-ex); Nuclear Experiment

Isospin triggering allows to distinguish coalescence from thermal production of light clusters in heavy ion collisions. Triggering on $Y(π^-) - Y(π^+)$ 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 $ΔY_π$. In contrast, in a thermal model, cluster production is independent on $ΔY_π$. The observation of a maximum deuteron (cluster) yield as function of $ΔY_π$ provides confirmation of the coalescence mechanism.<br/>6 pages, 5 figures, version accepted and published by Physical Review C<br/>