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arXiv 1601.01600nucl-th
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包括短程和长程相关的高密度中子物质中的配对

Pairing in high-density neutron matter including short- and long-range correlations

D. Ding, A. Rios, H. Dussan, W. H. Dickhoff, S. J. Witte, A. Carbone, A. Polls

摘要:

为了解决中子星唯象学中的一些悬而未决的问题,需要在很宽的密度范围内计算中子物质的配对能隙。传统上,Bardeen-Cooper-Schrieffer方法被用来计算裸核子-核子相互作用的能隙。在这里,我们将短期和长期的相关性的配对差距的影响。短程相关处理,包括适当的单粒子状态的碎片,并大大抑制间隙。长程关联通过密度和自旋模式来修饰配对相互作用,并提供相对较小的校正。我们使用不同的相互作用(其中一些与三体力有关)作为控制任何系统效应的起点。结果与中子星冷却的情景有关,特别是考虑到仙后座A最近的观测数据。

英文摘要:

Pairing gaps in neutron matter need to be computed in a wide range of densities to address open questions in neutron star phenomenology. Traditionally, the Bardeen-Cooper-Schrieffer approach has been used to compute gaps from bare nucleon-nucleon interactions. Here, we incorporate the influence of short- and long-range correlations in the pairing gaps. Short-range correlations are treated including the appropriate fragmentation of single-particle states, and substantially suppress the gaps. Long-range correlations dress the pairing interaction via density and spin modes, and provide a relatively small correction. We use different interactions, some with three-body forces, as a starting point to control for any systematic effects. Results are relevant for neutron-star cooling scenarios, in particular in view of the recent observational data on Cassiopeia A.

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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