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arXiv 1706.01013nucl-thnucl-ex
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用自旋相关截面模拟重离子碰撞中的自旋动力学

Simulating spin dynamics with spin-dependent cross sections in heavy-ion collisions

Yin Xia, Jun Xu, Bao-An Li, Wen-Qing Shen

摘要:

利用从自由空间中核子-核子散射的相移分析中提取的自旋单重态和自旋三重态核子-核子弹性散射截面,首次将自旋相关的核子-核子截面引入Boltzmann-Uehling-Uhlenbeck输运模型.我们发现集体流的自旋劈裂不受自旋相关截面的影响,证明它是研究介质中核自旋轨道相互作用的一个很好的探针。在介质核自旋-轨道平均场势导致局域自旋极化的情况下,我们发现自旋相关的微分核子-核子散射截面使自旋平均的可观测量,如自由核子和轻团簇的椭圆流变小.

英文摘要:

We have incorporated the spin-dependent nucleon-nucleon cross sections into a Boltzmann-Uehling-Uhlenbeck transport model for the first time, using the spin-singlet and spin-triplet nucleon-nucleon elastic scattering cross sections extracted from the phase-shift analyses of nucleon-nucleon scatterings in free space. We found that the spin splitting of the collective flows is not affected by the spin-dependent cross sections, justifying it as a good probe of the in-medium nuclear spin-orbit interaction. With the in-medium nuclear spin-orbit mean-field potential that leads to local spin polarization, we found that the spin-averaged observables, such as elliptic flows of free nucleons and light clusters, becomes smaller with the spin-dependent differential nucleon-nucleon scattering cross sections.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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