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

文献类型：期刊论文

作者Wang, Yongjia1; Guo, Chenchen2; Li, Qingfeng1,3; Le Fevre, Arnaud4; Leifels, Yvonne4; Trautmann, Wolfgang4
刊名PHYSICS LETTERS B
出版日期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
DOI10.1016/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.
WOS关键词EQUATION-OF-STATE ; PLUS AU COLLISIONS ; COLLECTIVE-FLOW ; PHOTON PRODUCTION ; SYMMETRY ENERGY ; KAON PRODUCTION ; CROSS-SECTION ; MATTER ; PROBE ; OBSERVABLES
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研究方向Astronomy & Astrophysics ; Physics
语种英语
WOS记录号WOS:000426436700028
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China ; Zhejiang Provincial Natural Science Foundation of China
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.

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来源：近代物理研究所

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