TY - JOUR
T1 - Constraining nucleon effective masses with flow and stopping observables from the SπRIT experiment
AU - SπRIT collaboration
AU - Tsang, C. Y.
AU - Kurata-Nishimura, M.
AU - Tsang, M. B.
AU - Lynch, W. G.
AU - Zhang, Y. X.
AU - Barney, J.
AU - Estee, J.
AU - Jhang, G.
AU - Wang, R.
AU - Kaneko, M.
AU - Lee, J. W.
AU - Isobe, T.
AU - Murakami, T.
AU - Ahn, D. S.
AU - Atar, L.
AU - Aumann, T.
AU - Baba, H.
AU - Boretzky, K.
AU - Brzychczyk, J.
AU - Cerizza, G.
AU - Chiga, N.
AU - Fukuda, N.
AU - Gasparic, I.
AU - Hong, B.
AU - Horvat, A.
AU - Ieki, K.
AU - Inabe, N.
AU - Kim, Y. J.
AU - Kobayashi, T.
AU - Kondo, Y.
AU - Lasko, P.
AU - Lee, H. S.
AU - Leifels, Y.
AU - Łukasik, J.
AU - Manfredi, J.
AU - McIntosh, A. B.
AU - Morfouace, P.
AU - Nakamura, T.
AU - Nakatsuka, N.
AU - Nishimura, S.
AU - Otsu, H.
AU - Pawłowski, P.
AU - Pelczar, K.
AU - Rossi, D.
AU - Sakurai, H.
AU - Santamaria, C.
AU - Sato, H.
AU - Scheit, H.
AU - Shane, R.
AU - Shimizu, Y.
N1 - Publisher Copyright:
© 2024 The Author(s)
PY - 2024/6
Y1 - 2024/6
N2 - 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 [Formula presented] 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.
AB - 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 [Formula presented] 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.
UR - https://www.scopus.com/pages/publications/85191296621
U2 - 10.1016/j.physletb.2024.138661
DO - 10.1016/j.physletb.2024.138661
M3 - Article
AN - SCOPUS:85191296621
SN - 0370-2693
VL - 853
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 138661
ER -