학술논문
Constraining nucleon effective masses with flow and stopping observables from the SπRIT experiment
Document Type
article
Author
C.Y. Tsang; M. Kurata-Nishimura; M.B. Tsang; W.G. Lynch; Y.X. Zhang; J. Barney; J. Estee; G. Jhang; R. Wang; M. Kaneko; J.W. Lee; T. Isobe; T. Murakami; D.S. Ahn; L. Atar; T. Aumann; H. Baba; K. Boretzky; J. Brzychczyk; G. Cerizza; N. Chiga; N. Fukuda; I. Gasparic; B. Hong; A. Horvat; K. Ieki; N. Inabe; Y.J. Kim; T. Kobayashi; Y. Kondo; P. Lasko; H.S. Lee; Y. Leifels; J. Łukasik; J. Manfredi; A.B. McIntosh; P. Morfouace; T. Nakamura; N. Nakatsuka; S. Nishimura; H. Otsu; P. Pawłowski; K. Pelczar; D. Rossi; H. Sakurai; C. Santamaria; H. Sato; H. Scheit; R. Shane; Y. Shimizu; H. Simon; A. Snoch; A. Sochocka; T. Sumikama; H. Suzuki; D. Suzuki; H. Takeda; S. Tangwancharoen; H. Törnqvist; Y. Togano; Z.G. Xiao; S.J. Yennello; Y. Zhang
Source
Physics Letters B, Vol 853, Iss , Pp 138661- (2024)
Subject
Language
English
ISSN
0370-2693
Abstract
Properties of the nuclear equation of state (EoS) can be probed by measuring the dynamical properties of nucleus-nucleus collisions. In this study, we present the directed flow (v1), elliptic flow (v2) and stopping (VarXZ) measured in fixed target Sn + Sn collisions at Image 1 with the SπRIT Time Projection Chamber. We perform Bayesian analyses in which EoS parameters are varied simultaneously within the Improved Quantum Molecular Dynamics-Skyrme (ImQMD-Sky) transport code to obtain a multivariate correlated constraint. The varied parameters include symmetry energy, S0, and slope of the symmetry energy, L, at saturation density, isoscalar effective mass, ms⁎/mN, isovector effective mass, mv⁎/mN and the in-medium cross-section enhancement factor η. We find that the flow and VarXZ observables are sensitive to the splitting of proton and neutron effective masses and the in-medium cross-section. Comparisons of ImQMD-Sky predictions to the SπRIT data suggest a narrow range of preferred values for ms⁎/mN, mv⁎/mN and η.