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

Morfouace, P.; Tsang, C.Y.; Zhang, Y.; Lynch, W. G.; Tsang, M. B.; Coupland, Daniel David Schechtman; Youngs, M.; Chajecki, Z.; Famiano, M. A.; Ghosh, T. K.; Jhang, G.; Lee, J.; Liu, H.; Sanetullaev, A.; Showalter, R.; Winkelbauer, Jack

doi:10.1016/j.physletb.2019.135045

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

Journal Article · 23 October 2019 · Physics Letters. B

DOI: https://doi.org/10.1016/j.physletb.2019.135045 · OSTI ID:1623431

Morfouace, P. ^[1]; Tsang, C.Y. ^[1]; Zhang, Y. ^[2]; Lynch, W. G. ^[1]; Tsang, M. B. ^[1];

^[3]; Youngs, M. ^[1]; Chajecki, Z. ^[4]; Famiano, M. A. ^[4]; Ghosh, T. K. ^[5]; Jhang, G. ^[1]; Lee, J. ^[6]; Liu, H. ^[7]; Sanetullaev, A. ^[1]; Showalter, R. ^[1];

^[3]

Michigan State Univ., East Lansing, MI (United States)
China Inst. of Atomic Energy (CIAE), Beijing (China)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Western Michigan Univ., Kalamazoo MI (United States)
Variable Energy Cyclotron Centre, Kolkata (India)
Hong Kong Univ. (Hong Kong)
Univ. of Texas, Austin, TX (United States)

Efficiency corrected single ratios of neutron and proton spectra in central ${}_{112}{Sn} +^{112} Sn$ and ${}_{124}{Sn} +^{124} Sn$ 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 $Δ m_{n p}^{⁎} = (m_{n}^{⁎} - m_{p}^{⁎}) / m_{N} = - {0.05}_{- 0.09}^{+ 0.09} δ$ . The correlated constraint on the standard symmetry energy, $$S_0$$ and the slope, L at saturation density yields the values of symmetry energy $S (ρ_{s}) = {16.8}_{- 1.2}^{+ 1.2}$ MeV at a sensitive density of $ρ_{s} / ρ_{0} = {0.43}_{- 0.05}^{+ 0.05}$ .

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1623431

Report Number(s):: LA-UR-19-31567; TRN: US2106880

Journal Information:: Physics Letters. B, Vol. 799, Issue C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 38 works

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