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Constraining nucleon effective masses with flow and stopping observables from the SπRIT experiment

https://doi.org/10.1016/j.physletb.2024.138661

Tsang, CY; Kurata-Nishimura, M; Tsang, MB; Lynch, WG; Zhang, YX; Barney, J; Estee, J; Jhang, G; Wang, R; Kaneko, M; et al (June 2024, Physics Letters B)

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 270AMeV with the S'll'RlT 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, m;/mN, isovector effective mass, m􀀒/mN and the in-medium cross-section enhancement factor rJ. 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'll' RJT data suggest a narrow range of preferred values for m;/mN, m􀀕/mN and 1/·
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Isoscaling in central Sn+Sn collisions at 270 MeV/u

https://doi.org/10.1140/epja/s10050-022-00851-2

Lee, J. W.; Tsang, M. B.; Tsang, C. Y.; Wang, R.; Barney, J.; Estee, J.; Isobe, T.; Kaneko, M.; Kurata-Nishimura, M.; Lynch, W. G.; et al (October 2022, The European Physical Journal A)

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Rapidity distributions of Z = 1 isotopes and the nuclear symmetry energy from Sn+Sn collisions with radioactive beams at 270 MeV/nucleon

https://doi.org/10.1016/j.physletb.2021.136681

Kaneko, M.; Murakami, T.; Isobe, T.; Kurata-Nishimura, M.; Ono, A.; Ikeno, N.; Barney, J.; Cerizza, G.; Estee, J.; Jhang, G.; et al (November 2021, Physics Letters B)

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Probing the Z = 6 spin-orbit shell gap with (p,2p) quasi-free scattering reactions

https://doi.org/10.1016/j.physletb.2020.135748

Syndikus, I.; Petri, M.; Macchiavelli, A.O.; Paschalis, S.; Bertulani, C.A.; Aumann, T.; Alvarez-Pol, H.; Atar, L.; Beceiro-Novo, S.; Benlliure, J.; et al (October 2020, Physics Letters B)
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Fragmentation of Single-Particle Strength around the Doubly Magic Nucleus ${}^{132}{Sn}$ and the Position of the $0 f_{5 / 2}$ Proton-Hole State in ${}^{131}{In}$

https://doi.org/10.1103/PhysRevLett.124.022501

Vaquero, V.; Jungclaus, A.; Aumann, T.; Tscheuschner, J.; Litvinova, E. V.; Tostevin, J. A.; Baba, H.; Ahn, D. S.; Avigo, R.; Boretzky, K.; et al (January 2020, Physical Review Letters)

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