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Momentum dependent mean-fields of (anti)hyperons
Nuclear Physics A ( IF 1.4 ) Pub Date : 2021-02-04 , DOI: 10.1016/j.nuclphysa.2021.122153
T. Gaitanos , A. Chorozidou

We investigate the in-medium properties of hyperons and anti-hyperons in the framework of the Non-Linear Derivative (NLD) model. We focus on the momentum dependence of in-medium strangeness optical potentials. The NLD model is based on the simplicity of the well-established Relativistic Mean-Field (RMF) approximation, but it incorporates an explicit momentum dependence on a field-theoretical level. The extension of the NLD model to the (anti)baryon-octet is formulated in the spirit of SU(6) and G-parity arguments. It is shown that with an appropriate choice of momentum cut-offs the Λ, Σ and Ξ optical potentials are consistent with recent studies of the chiral effective field theory and Lattice-QCD calculations over a wide momentum region. In addition, we present NLD predictions for the in-medium momentum dependence of Λ-, Σ- and Ξ-hyperons. This work is important for future experimental studies such as CBM, PANDA at the Facility for Antiproton and Ion Research (FAIR). It is relevant for nuclear astrophysics too.



中文翻译:

(反)超子的动量依赖平均场

我们研究非线性导数(NLD)模型框架中超子和反超子的中等性质。我们专注于中等奇异光学势的动量依赖性。NLD模型基于公认的相对论平均场(RMF)逼近的简单性,但它结合了场论水平上的显式动量依赖性。NLD模型到(反)重子八位字节的扩展是根据SU(6)和G奇偶校验参数的精神制定的。结果表明,与势头时切断合适的选择Λ,Σ和Ξ光学势与在很宽的势头区手征有效场论的最新研究和格子QCD计算是一致的。此外,我们对NLD的中等动量依赖性进行了NLD预测Λ-, Σ-和 Ξ-hyperons。这项工作对于未来的实验研究(例如反质子和离子研究设施(FAIR)的CBM,PANDA)非常重要。它也与核天体物理学有关。

更新日期:2021-02-04
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