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arXiv 1302.6048hep-ph
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三体协变Bethe-Salpeter方法中Delta和Omega电磁形状因子

Delta and Omega electromagnetic form factors in a three-body covariant Bethe-Salpeter approach

Helios Sanchis-Alepuz, Richard Williams, Reinhard Alkofer

摘要:

在Poincare协变束缚态方程的框架下计算了Delta和Omega重子的电磁形状因子。夸克-夸克相互作用被截断为一个单一的敷料胶子交换,其中敷料,我们使用两种不同的模型和比较的结果。计算预测的电荷分布和磁偶极子分布的扁长形的形状。我们还确定了必要性,包括在低光子动量转移的π介子云修正。

英文摘要:

The electromagnetic form factors of the Delta and Omega baryons are calculated in the framework of Poincare-covariant bound-state equations. The quark-quark interaction is truncated to a single dressed-gluon exchange where for the dressings we use two different models and compare the results. The calculation predicts an oblate shape for the electric charge distribution and a prolate shape for the magnetic dipole distribution. We also identify the necessity of including pion-cloud corrections at low photon-momentum transfer.

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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