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首页> 外文期刊>Nuclear Physics, A: Journal Devoted to the Experimental Study of the Fundamental Constituents of Matter and Their Actions >The in-medium nn cross section and the transport properties of neutron matter using the LOCV effective two-body interaction
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The in-medium nn cross section and the transport properties of neutron matter using the LOCV effective two-body interaction

机译：利用LOCV有效两体相互作用的中子nn截面和中子物质的传输性质

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摘要

In order to calculate the in-medium neutron-neutron (nn) differential cross section and the transport properties of the pure neutron matter, the lowest order constrained variational (LOCV) method is applied to obtain the effective nucleon-nucleon (NN) interactions from the various bare realistic phenomenological NN interaction. The wide range of potentials, such as the Reid68, the δ-Reid68, the V_8~' and the Av_(18) are used as the input phenomenological interactions. The approach, based on the effective NN interaction, allows for a consistent description of the neutron matter and the nucleon-nucleon scattering in the nuclear medium. In this work, by using the above LOCV effective NN interactions, beside the nn differential cross section, the related quantities such as the shear viscosity and the thermal conductivity of the pure neutron matter, which are the important gradient for the stellar structure, are calculated within the Landau-Abrikosov-Khalatnikov (LAK) formalism. It is shown that, while the density dependence of effective mass are not important, the choice of in-medium effective interaction has crucial rule on the resulting nn differential cross section as well as the shear viscosity and the thermal conductivity of pure neutron matter. Finally, our above LOCV calculations are compared with those predicted by the other theoretical methods.
机译：为了计算中子中子（nn）的微分截面和纯中子物质的传输性质，采用最低阶约束变分（LOCV）方法从中子获得有效的核子-核子（NN）相互作用各种裸露的现实现象学NN交互作用。诸如Reid68，δ-Reid68，V_8〜'和Av_（18）之类的广泛电势被用作输入现象学相互作用。该方法基于有效的NN交互作用，可以对中子物质和核介质中核子-核子的散射进行一致的描述。在这项工作中，通过使用上述LOCV有效NN相互作用，除了nn微分横截面之外，还计算了相关量，例如纯中子物质的剪切粘度和热导率，它们是恒星结构的重要梯度，在Landau-Abrikosov-Khalatnikov（LAK）形式主义中。结果表明，尽管有效质量的密度依赖性并不重要，但介质内有效相互作用的选择对所产生的nn微分截面以及剪切粘度和纯中子物质的热导率具有至关重要的规则。最后，将我们上面的LOCV计算结果与其他理论方法所预测的结果进行比较。

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