In-medium effects in strangeness production in heavy-ion collisions at (sub-) threshold energies

Taesoo Song,Joerg Aichelin,Joana Wirth,Laura Tolos,Elena Bratkovskaya

doi:10.1051/epjconf/202225913002

Abstract

We study the in-medium effects in strangeness production in heavyion collisions at (sub-)threshold energies based on the microscopic Parton-Hadron-String Dynamics (PHSD) transport approach. The in-medium modifications of the antikaon properties are described via the self-consistent coupledchannel unitarized scheme based on a SU(3) chiral Lagrangian while the inmedium modification of kaons are accounted via the kaon-nuclear potential, which is assumed to be proportional to the local baryon density. We find that the modifications of (anti)kaon properties in nuclear matter are necessary to explain the experimental data in heavy-ion collisions.

Highlights

In this contribution we present the highlights of our recent study [1] of the in-medium effects in the strangeness production in heavy-ion collisions atthreshold energies employing the microscopic transport approach PartonHadron-String Dynamics (PHSD) which incorporates the in-medium description of the antikaon-nucleon interactions based on ’state of the art’ many-body theory realized by the G-matrix formalism [2]
The in-medium modifications of the antikaon properties are described via the self-consistent coupledchannel unitarized scheme based on a SU(3) chiral Lagrangian while the inmedium modification of kaons are accounted via the kaon-nuclear potential, which is assumed to be proportional to the local baryon density
We find that the modifications ofkaon properties in nuclear matter are necessary to explain the experimental data in heavy-ion collisions. In this contribution we present the highlights of our recent study [1] of the in-medium effects in the strangeness production in heavy-ion collisions atthreshold energies employing the microscopic transport approach PHSD which incorporates the in-medium description of the antikaon-nucleon interactions based on ’state of the art’ many-body theory realized by the G-matrix formalism [2]

Summary

Introduction

In this contribution we present the highlights of our recent study [1] of the in-medium effects in the strangeness production in heavy-ion collisions at (sub-)threshold energies employing the microscopic transport approach PHSD which incorporates the in-medium description of the antikaon-nucleon interactions based on ’state of the art’ many-body theory realized by the G-matrix formalism [2]. This chiral unitary approach in coupled channels incorporates the sand p-waves of the kaon-nucleon interaction, its modification in the hot and dense medium to account for Pauli blocking effects, mean-field binding for baryons, as well as pion and kaon self-energies. We confront our theoretical results with available experimental data on (anti)kaon production at SIS energies (cf. Ref. [1] for details)

Chiral unitarized model for K N in hot nuclear matter

Summary