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arXiv 1209.3067nucl-th
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两π交换核势

Nuclear Potential with Two Pion Exchange

Takehisa Fujita, Naohiro Kanda, Sachiko Oshima

摘要:

我们仔细计算了核子-核子相互作用由于两个π交换过程通过适当评估相应的费曼图。在估计中,我们没有做任何近似,而是对三个费曼参数进行了数值积分。发现两个π介子交换势产生的吸引力对应于质量为$m_s\simeq 4.7 m_π$、强度为${g_s^2\over 4π}\simeq 1.45 $的有效标量介子。$(\bmτ_1\cdot \bmτ_2)^2 $具有很强的同位旋依赖性,这是单玻色子交换模型不能模拟的。

英文摘要:

We carefully calculate the nucleon-nucleon interaction due to two pion exchange processes by properly evaluating the corresponding Feynman diagrams. In the estimation, we have made no approximation, and instead, we carry out the numerical integrations of three Feynman parameters. It is found that the two pion exchange potential gives rise to the attractive force which corresponds to the effective scalar meson with its mass of $m_s\simeq 4.7 m_π$ and its strength of ${g_s^2\over 4π}\simeq 1.45 $. There is a strong isospin dependence of $(\bmτ_1\cdot \bmτ_2)^2 $ which cannot be simulated by the one boson exchange model calculations.

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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