Sumara, K.

2024
EDP Sciences Les Ulis

Abstract: Preliminary results of inclusive $\sigma^{+}(1385)$ production in $p + p$ reactions at $E_{\text{beam}} = 4.5 \ \text{GeV}$ and $\Lambda(1520)$ in $p + p$ and $p + \text{Nb}$ at $E_{\text{beam}} = 3.5 \ \text{GeV}$ are presented. Both measurements were performed by the HADES (\emph{High Acceptance Di-Electron Spectrometer}) experiment at FAIR/GSI. The analysis consisted of multiple steps including track reconstruction, particle identification and the reconstruction of the hyperon signal from their hadronic decays $\Lambda(1520) \rightarrow \Lambda \pi^{+} \pi^{-}$ and $\sigma^{+}(1385) \rightarrow \Lambda \pi^{+}$. The main part of the analysis, which is signal/background classification, was performed utilizing Machine Learning methods. The employed method relied on a data-driven approach called ``Classification Without Labels'' and the Multilayer Perceptron style Artificial Neural Networks. The analysis resulted in reconstruction of the resonance distributions for both $\sigma^{+}(1385)$ and $\Lambda(1520)$, and allowed for the extraction of parameters of the relativistic Breit-Wigner distributions.\end{abstract}

1. ( FAIR Facility )