Speaker
Description
Hyperons are a class of baryons that contains one or more strange quark. The study of hyperons is motivated by several physics interests. One exciting example is the investigation of hyperon-hadron interactions which may provide clues to understand the strong interaction in composite quark bound states.
The $\boldsymbol{\Lambda-\Lambda}$ channel production and the ensuing study of interaction between both the $\Lambda$ systems is expected to expand the knowledge on the role of strange particles in high-density systems like neutron stars and provide hints to unpack the ‘hyperon puzzle. I. Vidaña, 2016’
The main subject of this talk is the double-$\Lambda$ hyperon channel reconstruction [Eq. below] from the $p-p$ scattering data measured at HADES (High Acceptance Di-Electron Spectrometer) in march 2022 at GSI (GSI Helmholtz Centre for Heavy Ion Research (Gesellschaft für Schwerionenforschung)) HADES.
$\begin{equation}
\begin{split}
p(4.5 \text{GeV}) \ p \longrightarrow \Lambda^{(1)} + K^+ +\Lambda^{(2)} + K^+\\
\Lambda^{(1,2)} \longrightarrow \pi^{-} + p
\end{split}
\end{equation}$
The production reaction consisted of a proton beam of kinetic energy $4.5$ GeV impinging on an elongated Liquid $H_2$ HADES-FAIR Phase-0.
In this talk I will outline the relevant HADES detector subsystems essential for the double-$\Lambda$ studies. I will also introduce the analysis steps to reconstruct the $\boldsymbol{\Lambda-\Lambda}$ pairs with a kinematic track fitting procedure J. Regina, 2021. I will show some preliminary results for the cross-section estimate and conclude with future work.
