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arXiv 2107.04701nucl-thnucl-ex
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重离子碰撞中虚$e^+e^-$产生引起的库仑场修正

Coulomb field correction due to virtual $e^+e^-$ production in heavy ion collisions

Thomas Settlemyre, Aldo Bonasera, Hua Zheng

摘要:

讨论了$e^+e^-$对的虚产生对库仑能的修正,修正量约为核尺度下库仑能的百分之一。研究了在半经验质量公式中加入对产生项的影响以及用Bass势和库仑势对几个核碰撞的库仑势垒的修正。考虑到未来的工作,我们还利用约束分子动力学(CoMD)模型计算了高斯空间分布折叠后质子间的库仑能量和作用力的修正。

英文摘要:

The correction to the Coulomb energy due to virtual production of $e^+e^-$ pairs, which is on the order of one percent of the Coulomb energy at nuclear scales is discussed. The effects of including a pair-production term in the semi-empirical mass formula and the correction to the Coulomb barrier for a handful of nuclear collisions using the Bass and Coulomb potentials are studied. With an eye toward future work using Constrained Molecular Dynamics (CoMD) model, we also calculate the correction to the Coulomb energy and force between protons after folding with a Gaussian spatial distribution.

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