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Constraining nucleon effective masses with flow and stopping observables from the SπRIT experiment.
- Source :
-
Physics Letters B . Jun2024, Vol. 853, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
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 (v 1), elliptic flow (v 2) and stopping (VarXZ) measured in fixed target Sn + Sn collisions at ▪ with the S π RIT 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, S 0 , and slope of the symmetry energy, L , at saturation density, isoscalar effective mass, m s ⁎ / m N , isovector effective mass, m v ⁎ / m N 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 S π RIT data suggest a narrow range of preferred values for m s ⁎ / m N , m v ⁎ / m N and η. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PARTICLES (Nuclear physics)
*EQUATIONS of state
*BAYESIAN analysis
*TIN
*NEUTRONS
Subjects
Details
- Language :
- English
- ISSN :
- 03702693
- Volume :
- 853
- Database :
- Academic Search Index
- Journal :
- Physics Letters B
- Publication Type :
- Academic Journal
- Accession number :
- 177394321
- Full Text :
- https://doi.org/10.1016/j.physletb.2024.138661