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arXiv 1012.1273nucl-thastro-ph.SR
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超流核子物质的平衡态和非平衡态与弱相互作用

Superfluid nucleon matter in and out of equilibrium and weak interactions

E. E. Kolomeitsev, D. N. Voskresensky

摘要:

本文将冷超流费米液体的Larkin-Migdal方法推广到非平衡系统。应用了Schwinger-Keldysh图技术。该方法适用于任意角动量态的配对。我们考虑白体辐射问题,计算不同的直接反应的概率从一块费米子超流体。闭图技术是制定在与配对相关系统的完整的格林函数。利用切割规则对物质中的单核子、双核子等过程的图形进行了分类。论证了多段图在矢流守恒中的重要作用。在平衡系统的情况下,处理穿着格林函数,我们证明了计算之间的对应关系的Schwinger-Kadanoff-Baym-Keldysh形式主义和普通的松原技术。作为一个例子,我们考虑的中微子辐射的情况下,单重态配对的中子对破碎和形成过程。包括必要的相关效应。对正常顶点和反常顶点进行了介质内重正化。

英文摘要:

The Larkin-Migdal approach to a cold superfluid Fermi liquid is generalized for a non-equilibrium system. The Schwinger-Keldysh diagram technique is applied. The developed formalism is applicable to the pairing in the states with arbitrary angular momenta. We consider the white body radiation problem by calculating probabilities of different direct reactions from a piece of a fermion superfluid. The closed diagram technique is formulated in terms of the full Green's functions for systems with the pairing correlation. The cutting rules are used to classify the diagrams representing one-nucleon, two-nucleon, etc. processes in the matter. The important role of multi-piece diagrams for the vector-current conservation is demonstrated. In the case of equilibrated systems, dealing with dressed Green's functions, we demonstrate correspondence between calculations in the Schwinger-Kadanoff-Baym-Keldysh formalism and the ordinary Matsubara technique. As an example we consider neutrino radiation from the neutron pair breaking and formation processes in case of a singlet pairing. Necessary correlation effects are included. The in-medium renormalization of normal and anomalous vertices is performed.

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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