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arXiv 0810.5677nucl-th
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低能$\bar{K}N - πΣ$相互作用中的同位旋混合效应

Isospin mixing effects in low-energy $\bar{K}N - πΣ$ interaction

J. Révai, N. V. Shevchenko

摘要:

构造了一个新的强耦合通道$\bar{K}N - πΣ$势,它再现了所有现有的实验数据,适合于精确的少体计算。研究了直接计入库仑相互作用和在计算中使用物理质量的同位旋破缺效应。得到了与散射数据一致的K介子氢的$1 s$能级位移和宽度,并计算了相应的精确强$K^- p$散射长度.考虑了$Λ(1405)$共振的单极点和双极点形式。

英文摘要:

New strong coupled-channel $\bar{K}N - πΣ$ potential, reproducing all existing experimental data and suitable for using in an accurate few-body calculations, is constructed. Isospin breaking effects of direct inclusion of the Coulomb interaction and using of physical masses in calculations are investigated. The $1 s$ level shift and width of kaonic hydrogen, consistent with the scattering data, was obtained and the corresponding exact strong $K^- p$ scattering length was calculated. One- and two-pole form of $Λ(1405)$ resonance was considered.

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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