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arXiv 1008.4149hep-phhep-latnucl-th
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Dyson-Schwinger方程彩虹阶梯截断的Delta性质

Delta properties in the rainbow-ladder truncation of Dyson-Schwinger equations

D. Nicmorus, G. Eichmann, A. Krassnigg, R. Alkofer

摘要:

本文用庞加莱协变Faddeev方法计算了三夸克核对核子和δ重子质量的贡献以及δ电磁形状因子。一个一致的设置为dressed-quark传播,夸克夸克,夸克-“双夸克”和夸克-光子相互作用,其中所有成分是解决方案,其各自的戴森-Schwinger或Bethe-Salpeter方程在彩虹阶梯截断。由此产生的Delta电磁形状因子与目前的实验和晶格数据一致。

英文摘要:

We present a calculation of the three-quark core contribution to nucleon and Delta-baryon masses and Delta electromagnetic form factors in a Poincare-covariant Faddeev approach. A consistent setup for the dressed-quark propagator, the quark-quark, quark-'diquark' and quark-photon interactions is employed, where all ingredients are solutions of their respective Dyson-Schwinger or Bethe-Salpeter equations in a rainbow-ladder truncation. The resulting Delta electromagnetic form factors concur with present experimental and lattice data.

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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