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arXiv 0704.0711nucl-th
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双π交换三核子势:O(q^4)手征展开

Two-pion exchange three-nucleon potential: O(q^4) chiral expansion

S. Ishikawa, M. R. Robilotta

摘要:

我们将二π交换三核子势(TPE-3 NP)展开到手征级q^4,它对应于该级所有可能性的一个子集,并基于O(q^3)处的\piN振幅。结果包括对以前O(q^3)项强度系数的数值修正和剖面函数中的新结构。前者通常小于10%,而后者由作用于波函数的回路函数或非局部梯度引起。新的TPE-3 NP对静态和散射三体观测值的影响进行了评估,并发现是小的,预期从微扰校正。

英文摘要:

We present the expansion of the two-pion exchange three-nucleon potential (TPE-3NP) to chiral order q^4, which corresponds to a subset of all possibilities at this order and is based on the \piN amplitude at O(q^3). Results encompass both numerical corrections to strength coefficients of previous O(q^3) terms and new structures in the profile functions. The former are typically smaller than 10% whereas the latter arise from either loop functions or non-local gradients acting on the wave function. The influence of the new TPE-3NP over static and scattering three-body observables has been assessed and found to be small, as expected from perturbative corrections.

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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