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

Tsang, C. Y.; Kurata-Nishimura, M.; Tsang, M. B.; Lynch, W. G.; Zhang, Y. X.; Barney, J.; Estee, J.; Jhang, G.; Wang, R.; Kaneko, M.; Lee, J. W.; Isobe, T.; Murakami, T.; Ahn, D. S.; Atar, L.; Aumann, T.; Baba, H.; Boretzky, K.; Brzychczyk, J.; Cerizza, G.; Chiga, N.; Fukuda, N.; Gasparic, I.; Hong, B.; Horvat, A.; Ieki, K.; Inabe, N.; Kim, Y. J.; Kobayashi, T.; Kondo, Y.; Lasko, P.; Lee, H. S.; Leifels, Y.; Lukasik, J.; Manfredi, J.; McIntosh, A. B.; Morfouace, P.; Nakamura, T.; Nakatsuka, N.; Nishimura, S.; Otsu, H.; Pawlowski, P.; Pelczar, K.; Rossi, D.; Sakurai, H.; Santamaria, C.; Sato, H.; Scheit, H.; Shane, R.; Shimizu, Y.; Simon, H.; Snoch, A.; Sochocka, A.; Sumikama, T.; Suzuki, H.; Suzuki, D.; Takeda, H.; Tangwancharoen, S.; Toernqvist, H.; Togano, Y.; Xiao, Z. G.; Yennello, S. J.; Zhang, Y.

doi:10.1016/j.physletb.2024.138661

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

Tsang, C. Y.;
Kurata-Nishimura, M.;
Tsang, M. B.;
Lynch, W. G.;
Zhang, Y. X.;
... Hong, B.;
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초록

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 ( 1 ), elliptic flow ( 2 ) and stopping (VarXZ) measured in fixed target Sn + Sn collisions at 270 AMeV with the S 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, 0 , and slope of the symmetry energy, , at saturation density, isoscalar effective mass, * / , isovector effective mass, * / and the in -medium cross-section enhancement factor . 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 RIT data suggest a narrow range of preferred values for * / , * / and .

키워드

PARAMETRIZATION; SATURATION; COLLISIONS; TRANSPORT; DYNAMICS; EQUATION; STATE

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

저자: Tsang, C. Y.; Kurata-Nishimura, M.; Tsang, M. B.; Lynch, W. G.; Zhang, Y. X.; Barney, J.; Estee, J.; Jhang, G.; Wang, R.; Kaneko, M.; Lee, J. W.; Isobe, T.; Murakami, T.; Ahn, D. S.; Atar, L.; Aumann, T.; Baba, H.; Boretzky, K.; Brzychczyk, J.; Cerizza, G.; Chiga, N.; Fukuda, N.; Gasparic, I.; Hong, B.; Horvat, A.; Ieki, K.; Inabe, N.; Kim, Y. J.; Kobayashi, T.; Kondo, Y.; Lasko, P.; Lee, H. S.; Leifels, Y.; Lukasik, J.; Manfredi, J.; McIntosh, A. B.; Morfouace, P.; Nakamura, T.; Nakatsuka, N.; Nishimura, S.; Otsu, H.; Pawlowski, P.; Pelczar, K.; Rossi, D.; Sakurai, H.; Santamaria, C.; Sato, H.; Scheit, H.; Shane, R.; Shimizu, Y.; Simon, H.; Snoch, A.; Sochocka, A.; Sumikama, T.; Suzuki, H.; Suzuki, D.; Takeda, H.; Tangwancharoen, S.; Toernqvist, H.; Togano, Y.; Xiao, Z. G.; Yennello, S. J.; Zhang, Y.

DOI: 10.1016/j.physletb.2024.138661

발행일: 2024-06

유형: Article

저널명: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

권: 853

언어: ENG

출판사: ELSEVIER

발행국가: 네덜란드

ISSN: E 1873-2445
P 0370-2693