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arXiv nucl-th/9602012nucl-thhep-ph
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Goldstone定理与彩虹梯近似下的双夸克禁闭

Goldstone Theorem and Diquark Confinement Beyond Rainbow-Ladder Approximation

A. Bender, C. D. Roberts, L. v. Smekal

摘要:

本文用截断方法研究了夸克Dyson-Schwinger方程和介子Bethe-Salpeter方程,该方法推广了彩虹梯近似,使得在手征极限下等矢量赝标介子保持无质量.夸克-夸克(双夸克)关联,这是在彩虹阶梯近似约束,不稳定的排斥性的贡献,只出现在更高的顺序在贝特-萨尔彼得内核。高阶项对介子束缚态质量的净影响很小。

英文摘要:

The quark Dyson-Schwinger equation and meson Bethe-Salpeter equation are studied in a truncation scheme that extends the rainbow-ladder approximation such that, in the chiral limit, the isovector, pseudoscalar meson remains massless. Quark-quark (diquark) correlations, which are bound in rainbow-ladder approximation, are destabilised by repulsive contributions that only appear at higher order in the Bethe-Salpeter kernel. The net effect of higher order terms on the meson bound-state masses is small.

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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