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

P. Morfouace; C.Y. Tsang; Y. Zhang; W.G. Lynch; M.B. Tsang; D.D.S. Coupland; M. Youngs; Z. Chajecki; M.A. Famiano; T.K. Ghosh; G. Jhang; Jenny Lee; H. Liu; A. Sanetullaev; R. Showalter; J. Winkelbauer

Physics Letters B (Dec 2019)

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

P. Morfouace,
C.Y. Tsang,
Y. Zhang,
W.G. Lynch,
M.B. Tsang,
D.D.S. Coupland,
M. Youngs,
Z. Chajecki,
M.A. Famiano,
T.K. Ghosh,
G. Jhang,
Jenny Lee,
H. Liu,
A. Sanetullaev,
R. Showalter,
J. Winkelbauer

Affiliations

P. Morfouace: National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA; Corresponding author.
C.Y. Tsang: National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
Y. Zhang: China Institute of Atomic Energy, Beijing, 102413, China
W.G. Lynch: National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
M.B. Tsang: National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
D.D.S. Coupland: National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
M. Youngs: National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
Z. Chajecki: Department of Physics, Western Michigan University, Kalamazoo, MI 49008, USA
M.A. Famiano: Department of Physics, Western Michigan University, Kalamazoo, MI 49008, USA
T.K. Ghosh: Variable Energy Cyclotron Centre, 1/AF Bidhannagar, Kolkata 700064, India
G. Jhang: National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
Jenny Lee: Department of Physics, The University of Hong Kong, Hong Kong, China
H. Liu: Texas Advanced Computing Center, University of Texas, Austin, TX 78758, USA
A. Sanetullaev: National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
R. Showalter: National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
J. Winkelbauer: National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA

Journal volume & issue: Vol. 799

Abstract

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Efficiency corrected single ratios of neutron and proton spectra in central Sn112+112Sn and Sn124+124Sn 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, ms⁎−mv⁎ are strongly correlated. The linear correlation observed in ms⁎−mv⁎ yields a nearly independent constraint on the effective mass splitting Δmnp⁎=(mn⁎−mp⁎)/mN=−0.05−0.09+0.09δ. The correlated constraint on the standard symmetry energy, S0 and the slope, L at saturation density yields the values of symmetry energy S(ρs)=16.8−1.2+1.2 MeV at a sensitive density of ρs/ρ0=0.43−0.05+0.05. Keywords: Symmetry energy, Heavy-ion collisions, Bayesian analysis

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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