Speaker
Description
Hyperon-hyperon (YY) and hyperon-nucleon (YN) interaction potentials play an important role in understanding the strangeness content of neutron star cores. YY and YN interactions are thoroughly studied at e.g. ALICE, which has the benefit of using a high energy proton beam to produce hyperons abundantly. However, further studies are needed since many of the interactions involving strangeness are not known. HADES (High-Acceptance Di-Electron Spectrometer) at GSI collected high-statistics proton-proton data in 2022 using a beam with 4.5 GeV kinetic energy. This lower energy is beneficial for creating the YY or YN system with low relative momentum, which is needed to access the potential. The Λ Λ reaction is currently being studied at HADES along with the reaction pp→p K+ K+ Ξ- [ π- Λ [p π-] ], which is currently being analyzed in order to investigate double strange YN interactions close to threshold. Measuring the latter reaction in p+p data is also important in order to explain excess yield measured in Ar+KCl and p+Nb reactions at HADES. This talk will address the hyperon physics related to the ongoing analyses at HADES and present selected results.
