Constraining the symmetry energy with heavy-ion collisions and Bayesian analyses

被引：51

作者：

Morfouace, P. ^{[1
,2
]}

Tsang, C. Y. ^{[1
,2
]}

Zhang, Y. ^{[3
]}

Lynch, W. G. ^{[1
,2
]}

Tsang, M. B. ^{[1
,2
]}

Coupland, D. D. S. ^{[1
,2
]}

Youngs, M. ^{[1
,2
]}

Chajecki, Z. ^{[4
]}

Famiano, M. A. ^{[4
]}

Ghosh, T. K. ^{[6
]}

Jhang, G. ^{[1
,2
]}

Lee, Jenny ^{[5
]}

Liu, H. ^{[7
]}

Sanetullaev, A. ^{[1
,2
]}

Showalter, R. ^{[1
,2
]}

Winkelbauer, J. ^{[1
,2
]}

机构：

[1] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[2] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[3] China Inst Atom Energy, Beijing 102413, Peoples R China

[4] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA

[5] Univ Hong Kong, Dept Phys, Hong Kong, Peoples R China

[6] Variable Energy Cyclotron Ctr, 1-AF Bidhannagar, Kolkata 700064, India

[7] Univ Texas Austin, Texas Adv Comp Ctr, Austin, TX 78758 USA

来源：

PHYSICS LETTERS B | 2019年 / 799卷

基金：

美国国家科学基金会;

关键词：

Symmetry energy; Heavy-ion collisions; Bayesian analysis; EFFECTIVE-MASS; LARGE-AREA; EQUATION; DENSITY; MATTER; FORCE; STATE;

D O I：

10.1016/j.physletb.2019.135045

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Efficiency corrected single ratios of neutron and proton spectra in central Sn-112 + Sn-112 and Sn-124 + Sn-124 collisions at 120 MeV/u are combined with double ratios to provide constraints on the density and momentum dependencies of the isovector mean-field potential. Bayesian analyses of these data reveal that the isoscalar and isovector nucleon effective masses, m(s)* - m(v)* are strongly correlated. The linear correlation observed in m(s)* - m(v)* yields a nearly independent constraint on the effective mass splitting Delta m(np)* = (m(n)* - m(p)*)/m(N) = -0.05(-0.09)(+0.09)delta. The correlated constraint on the standard symmetry energy, S-0 and the slope, L at saturation density yields the values of symmetry energy S(rho(s) ) = 16.8(-1.2)(+1.2) MeV at a sensitive density of rho(s)/rho(0) = 0.43(-0.05)(+0.05). (C) 2019 The Authors. Published by Elsevier B.V.

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页数：6

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