Constraints from the SπRIT experiment and their implications on nuclear matter equation of state
ORAL
Abstract
Properties of the nuclear equation of state (EoS) can be probed by measuring the dynamical properties of nucleus-nucleus collision. With appropriate transformation, nuclear EoS also describes the properties of neutron stars. Therefore, it is possible to combine results from terrestrial experiments with astronomical observations to constrain EoS comprehensively.
In this talk, we present directed flow, elliptic flow and stopping (VarXZ) observable from fixed target Sn + Sn collision at 270 AMeV recorded by the SπRIT time projection chamber (TPC). Bayesian inference is performed to compare experimental results with predictions from the Improved Quantum Molecular Dynamics-Skyrme (ImQMD-Sky) transport model. We obtain tight constraints on effective masses and in-medium cross-section.
By incorporating these constraints, along with constraints derived from pion ratio data [1], we aim to enhance our understanding of neutron stars. Additionally, we briefly explore how multi-messenger constraints contribute to determining the nuclear EoS at various baryon densities.
Reference:
[1] J. Estee, W. G. Lynch, C. Y. Tsang, J. Barney, G. Jhang, M. B. Tsang, R. Wang, M. Kaneko, J. W. Lee, T. Isobe, et al., Probing the Symmetry Energy with the Spectral Pion Ratio, Physical Review Letters 126, 162701 (2021).
In this talk, we present directed flow, elliptic flow and stopping (VarXZ) observable from fixed target Sn + Sn collision at 270 AMeV recorded by the SπRIT time projection chamber (TPC). Bayesian inference is performed to compare experimental results with predictions from the Improved Quantum Molecular Dynamics-Skyrme (ImQMD-Sky) transport model. We obtain tight constraints on effective masses and in-medium cross-section.
By incorporating these constraints, along with constraints derived from pion ratio data [1], we aim to enhance our understanding of neutron stars. Additionally, we briefly explore how multi-messenger constraints contribute to determining the nuclear EoS at various baryon densities.
Reference:
[1] J. Estee, W. G. Lynch, C. Y. Tsang, J. Barney, G. Jhang, M. B. Tsang, R. Wang, M. Kaneko, J. W. Lee, T. Isobe, et al., Probing the Symmetry Energy with the Spectral Pion Ratio, Physical Review Letters 126, 162701 (2021).
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Presenters
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Manyee B Tsang
Michigan State University
Authors
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Chun Yuen Y Tsang
Kent State University, FRIB
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Manyee B Tsang
Michigan State University
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William G Lynch
Michigan State University
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YingXun Zhang
China Institute of Atomic Energy