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arXiv 0811.1113hep-phhep-thnucl-th
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Bethe-Salpeter方程和光阵面方程中的三体力

Three-body forces in Bethe-Salpeter and light-front equations

V. A. Karmanov, P. Maris

摘要:

在相对论框架下,由Bethe-Salpeter束缚态方程和光阵面束缚态方程,计算了三个标量粒子与标量交换粒子相互作用系统的束缚能.与二体系统相反,在这两种方法中获得的三体结合能彼此显著不同:与梯形Bethe-Salpeter方程相比,光阵面动力学中的梯形内核欠结合大约为2倍。考虑到三体的力量,在光前的方法,由两个交换粒子在飞行中产生的,我们发现,这种差异消失的大部分;对于小交换质量,得到的结合能相互吻合。

英文摘要:

In relativistic frameworks, given by the Bethe-Salpeter and light-front bound state equations, the binding energies of system of three scalar particles interacting by scalar exchange particles are calculated. In contrast to two-body systems, the three-body binding energies obtained in these two approaches differ significantly from each other: the ladder kernel in light-front dynamics underbinds by approximately a factor of two compared to the ladder Bethe-Salpeter equation. By taking into account three-body forces in the light-front approach, generated by two exchange particles in flight, we find that most of this difference disappears; for small exchange masses, the obtained binding energies coincide with each other.

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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