How Deep is the Antinucleon Optical Potential at FAIR energies
How Deep is the Antinucleon Optical Potential at FAIR energies
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DOI：
10.1016/j.physletb.2011.07.071
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发表时间：
2011-05
影响因子：
4.4
通讯作者：
T. Gaitanos;M. Kaskulov;H. Lenske
中科院分区：
文献类型：
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作者：
T. Gaitanos;M. Kaskulov;H. Lenske
核介质中反核子相互作用的关键问题是反核子-核光学势的深度。在这项工作中，我们研究这一任务的非线性衍生物（NLD）模型的框架，该模型描述了一致的核物质和狄拉克现象的核子-核相互作用的散装性质。我们将NLD模型应用于核物质中的反核子相互作用，发现能量和密度的矢量和标量自能强烈下降，从而在零动量，特别是在FAIR能量下对光学势产生强烈抑制。这与现有的经验信息是一致的，因此，解决了相对论平均场（RMF）模型中G宇称参数不相容的问题。我们得出结论，我们的结果在FAIR未来的活动的相关性。
The key question in the interaction of antinucleons in the nuclear medium concerns the deepness of the antinucleon–nucleus optical potential. In this work we study this task in the framework of the non-linear derivative (NLD) model which describes consistently bulk properties of nuclear matter and Dirac phenomenology of nucleon–nucleus interactions. We apply the NLD model to antinucleon interactions in nuclear matter and find a strong decrease of the vector and scalar self-energies in energy and density and thus a strong suppression of the optical potential at zero momentum and, in particular, at FAIR energies. This is in agreement with available empirical information and, therefore, resolves the issue concerning the incompatibility of G-parity arguments in relativistic mean-field (RMF) models. We conclude the relevance of our results for the future activities at FAIR.