Determination of the nuclear incompressibility from the rapidity-dependent elliptic flow in heavy-ion collisions at beam energies 0.4A-1.0A GeV

doi:10.1016/j.physletb.2018.01.035

	Determination of the nuclear incompressibility from the rapidity-dependent elliptic flow in heavy-ion collisions at beam energies 0.4A-1.0A GeV
	Wang, Yongjia 1; Guo, Chenchen 2; Li, Qingfeng 1,3; Le Fevre, Arnaud 4; Leifels, Yvonne 4; Trautmann, Wolfgang 4
刊名	PHYSICS LETTERS B
	2018-03-10
卷号	778 页码:207-212
关键词	Nuclear equation of state Transport model Nuclear symmetry energy Heavy ion collision Collective flow
ISSN号	0370-2693
DOI	10.1016/j.physletb.2018.01.035
英文摘要	Background: The nuclear incompressibility (K-0) plays a crucial role in understanding diverse phenomena in nuclear structure and reactions, as well as in astrophysics. Heavy-ion-collision measurements in combination with transport model simulations serve as important tools for extracting the nuclear incompressibility. However, uncertainties in transport models (or model dependence) partly affect the reliability of the extracted result. Purpose: In the present work, by using the recently measured data of rapidity-dependent flows, we constrain the incompressibility of nuclear matter and analyze the impact of model uncertainties on the obtained value. Method: The method is based on the newly updated version of the ultrarelativistic quantum molecular dynamics (UrQMD) model in which the Skyrme potential energy-density functional is introduced. Three different Skyrme interactions which give different incompressibilities varying from K-0 = 201 to 271 MeV are adopted. The incompressibility is deduced from the comparison of the UrQMD model simulations and the FOPI data for rapidity-dependent elliptic flow in Au + Au collisions at beam energies 0.4A-1.0A GeV. Results: The elliptic flow v(2) as a function of rapidity y(0) can be well described by a quadratic fit v(2) = v(20) + v(22) . y(0)(2). It is found that the quantity v(2n) defined by v(2n) = vertical bar v(20)vertical bar +vertical bar v(22)vertical bar is quite sensitive to the incompressibility K-0 and the in-medium nucleon-nucleon cross section, but not sensitive to the slope parameter L of the nuclear symmetry energy. Conclusions: With the FU3FP4 parametrization of the in-medium nucleon-nucleon cross section, an averaged K-0 = 220 +/- 40 MeV is extracted from the v(2n) of free protons and deuterons. However, remaining systematic uncertainties, partly related to the choice of in-medium nucleon-nucleon cross sections, are of the same magnitude (+/- 40 MeV). Overall, the rapidity dependent elliptic flow supports a soft symmetric-matter equation-of-state. (C) 2018 The Author(s). Published by Elsevier B.V.
资助项目	National Natural Science Foundation of China[11505057] ; National Natural Science Foundation of China[11375062] ; National Natural Science Foundation of China[11605270] ; National Natural Science Foundation of China[11647306] ; National Natural Science Foundation of China[11747312] ; Zhejiang Provincial Natural Science Foundation of China[LY18A050002]
WOS关键词	EQUATION-OF-STATE ; PLUS AU COLLISIONS ; COLLECTIVE-FLOW ; PHOTON PRODUCTION ; SYMMETRY ENERGY ; KAON PRODUCTION ; CROSS-SECTION ; MATTER ; PROBE ; OBSERVABLES
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000426436700028
资助机构	National Natural Science Foundation of China ; Zhejiang Provincial Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/47376]
专题	中国科学院近代物理研究所
作者单位	1.Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China 2.Sun Yat Sen Univ, Sinofrench Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 4.GSI Helmholtzzentrum Schwerionenforsch GnbH, D-64291 Darmstadt, Germany
推荐引用方式 GB/T 7714	Wang, Yongjia,Guo, Chenchen,Li, Qingfeng,et al. Determination of the nuclear incompressibility from the rapidity-dependent elliptic flow in heavy-ion collisions at beam energies 0.4A-1.0A GeV[J]. PHYSICS LETTERS B,2018,778:207-212.
APA	Wang, Yongjia,Guo, Chenchen,Li, Qingfeng,Le Fevre, Arnaud,Leifels, Yvonne,&Trautmann, Wolfgang.(2018).Determination of the nuclear incompressibility from the rapidity-dependent elliptic flow in heavy-ion collisions at beam energies 0.4A-1.0A GeV.PHYSICS LETTERS B,778,207-212.
MLA	Wang, Yongjia,et al."Determination of the nuclear incompressibility from the rapidity-dependent elliptic flow in heavy-ion collisions at beam energies 0.4A-1.0A GeV".PHYSICS LETTERS B 778(2018):207-212.