Machine-learning-based identification for initial clustering structure in relativistic heavy-ion collisions

Understand

$\alpha$-clustering structure is a significant topic in light nuclei.

• A Bayesian convolutional neural network (BCNN) is applied to classify initial non-clustered and clustered configurations, namely Woods-Saxon distribution and three-$\alpha$ triangular (four-$\alpha$ tetrahedral) structure for $^{12}$C ($^{16}$O), from heavy-ion collision events generated within a multi-phase transport (AMPT) model.
• Azimuthal angle and transverse momentum distributions of charged pions are taken as inputs to train the classifier.
• On multiple-event basis, the overall classification accuracy can reach $95\%$ for $^{12}$C/$^{16}$O + $^{197}$Au events at $\sqrt{S_{NN}} =$ 200 GeV.