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arXiv 2006.02023nucl-th
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具有新传输码的扩展奇偶偶模型

Extended parity doublet model with a new transport code

Myungkuk Kim, Sangyong Jeon, Young-Min Kim, Youngman Kim, Chang-Hwan Lee

摘要:

一个新的输运程序“DaeJeonBoltzmann-Uehling-Uhlenbeck(DJBUU)”已经被开发出来,能够描述低能区重离子碰撞的动力学。为了确认新代码的有效性,我们首先计算Au + Au碰撞在Ebeam = 100和400 A MeV,也执行框计算,以检查碰撞的细节和泡利阻塞没有平均场的潜力,建议由运输代码比较项目。在验证了新输运程序的正确性后,我们用扩展的宇称偶重态模型研究了低能重离子碰撞。由于宇称二重态模型的显著特点是存在对核子质量有贡献的手征不变质量,我们研究了低能重离子碰撞中物理量如何依赖于手征不变质量.为此,我们计算了物理量,如在中心碰撞的有效核子质量和横向流在半中心碰撞的Au + Au在Ebeam = 400 A MeV的手征不变质量的不同值。

英文摘要:

A new transport code "DaeJeon Boltzmann-Uehling-Uhlenbeck (DJBUU)" had been developed and enables to describe the dynamics of heavy-ion collisions in low-energy region. To confirm the validity of the new code, we first calculate Au + Au collisions at Ebeam = 100 and 400A MeV and also perform the box calculation to check the detail of collisions and Pauli blocking without mean-field potential as suggested by the Transport Code Comparison Project. After confirming the validity of new transport code, we study low-energy heavy-ion collisions with an extended parity doublet model. Since the distinctive feature of the parity doublet model is the existence of the chiral invariant mass that contributes to the nucleon mass, we investigate how physical quantities depend on the chiral invariant mass in heavy ion collisions at low energies. For this, we calculate physical quantities such as the effective nucleon mass in central collisions and transverse flow in semi-central collisions of Au + Au at Ebeam = 400A MeV with different values of the chiral invariant masses.

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