Speaker
Prof.
Elena Bratkovskaya
(GSI and Frankfurt Uni.)
Description
We study the effect of the chiral symmetry restoration (CSR) in
heavy-ion collisions from $\sqrt{s_{NN}}$=3-160 GeV within the
Parton-Hadron-String Dynamics (PHSD) transport approach. The PHSD
includes the deconfinement phase transition as well as essential
aspects of CSR in the dense and hot hadronic medium, which are
incorporated in the Schwinger mechanism for the hadronic particle
production. Our systematic studies show that chiral symmetry
restoration plays a crucial role in the description of heavy-ion
collisions giving an increase of the hadronic particle production in
the strangeness sector with respect to the non-strange one. We
identify particle abundances and rapidity spectra to be suitable
probes in order to extract information about CSR, while transverse
mass spectra are less sensitive. Furthermore, the
appearance/disappearance of the 'horn'-structure in the $K^+/\pi^+$
ratio is investigated as a function of the system size in central
A+A collisions.
Refs:
[1] A. Palmese at al., Phys. Rev. C 94 (2016) 044912
[2] W. Cassing et al., Phys.Rev. C93 (2016) 014902
| I intend to submit my contribution for the proceedings | Yes |
|---|
Primary author
Prof.
Elena Bratkovskaya
(GSI and Frankfurt Uni.)
Co-authors
Mrs
Alessia Palmese
(Giessen Uni.)
Mr
Eduard Seifert
(Giessen Uni.)
Mr
Pierre Moreau
(Frankfurt. Uni.)
Mr
Thorsten Steinert
(Giessen Uni.)
Prof.
Wolfgnag Cassing
(Giessen Uni.)
