CHIRAL SYMMETRY RESTORATION IN HEAVY-ION COLLISIONS AT HIGH BARYON DENSITY

被引：1

作者：

Bratkovskaya, E. L. ^{[1
,2
]}

Cassing, W. ^{[3
]}

Palmese, A. ^{[3
]}

Moreau, P. ^{[2
]}

机构：

[1] GSI Helmholtzzentrum Schwerionenforsch GmbH, Darmstadt, Germany

[2] Goethe Univ Frankfurt, Inst Theoret Phys, Frankfurt, Germany

[3] Univ Giessen, Inst Theoret Phys, Giessen, Germany

来源：

ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT | 2017年 / 10卷 / 03期

关键词：

D O I：

10.5506/APhysPolBSupp.10.507

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the effect of the chiral symmetry restoration (CSR) in heavyion collisions from root s(NN) = 3-20 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 heavyion 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.

引用

页码：507 / 511

页数：5

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