Speaker
Description
The Parton-Hadron-Quantum-Molecular Dynamics (PHQMD) is a microscopic transport approach designed to describe the dynamical formation of clusters in HICs [1]. Within this framework we discuss the production of deuterons by two different mechanisms. The first one is the 'kinetic' formation of deuterons by inelastic $NNN \rightarrow N d$ and $\pi NN \rightarrow \pi d$ scattering processes which we implement by means of the covariant rate formalism [2]. Moreover, we investigate within these reactions the inclusion of finite-size effects modeled on the deuteron quantum wave function.
The second mechanism accounts for the formation of deuteron by the 'potential' interaction among nucleons. To recognize those baryons which gather together into clusters, we employ the Minimum-Spanning-Tree (MST) algorithm which looks for correlations of nucleons in coordinate space during the PHQMD evolution of the expanding matter [3]. Finally, we show that the combination of the two mechanisms provides a good description of the available experimental measurements in a large HICs energy range.
[1] J. Aichelin, E. Bratkovskaya, A. Le Fèvre, V. Kireyeu, V. Kolesnikov, Y. Leifels, V. Voronyuk and G. Coci, ``Parton-hadron-quantum-molecular dynamics: A novel microscopic $n$ -body transport approach for heavy-ion collisions, dynamical cluster formation, and hypernuclei production'', Phys. Rev. C 101 (2020) no.4, 044905.
[2] W. Cassing, ``Anti-baryon production in hot and dense nuclear matter'', Nucl. Phys. A 700, 618-646 (2002).
[3] S. Gläßel, V. Kireyeu, V. Voronyuk, J. Aichelin, C. Blume, E. Bratkovskaya, G. Coci, V. Kolesnikov and M. Winn, ``Cluster and hypercluster production in relativistic heavy-ion collisions within the parton-hadron-quantum-molecular-dynamics approach'', Phys. Rev. C 105 (2022) no.1, 014908.
