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arXiv 1601.02247hep-phnucl-th
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核子静态性质经典计算的再检验

Classic Calculations of Static Properties of the Nucleons reexamined

N. F. Nasrallah

备注：
8 pages, details explicit-ed, misprints corrected, version to appear in Physical Review C
发表信息：
Phys. Rev. C 93, 035207 (2016)
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摘要：

用传统的指数核计算核子的磁矩mu_p和mu_n时，不仅显示出对Borel质量变化的不稳定性，而且还显示出对微扰QCD起始点选择的任意性。使用多项式核，其系数由核子共振的质量确定，稳定了计算，并提供了更好的阻尼核子连续谱的未知贡献。该方法也可用于计算质子与轴流的耦合gA和中子-质子质量差Δ M_np的强部分。所有这些量都敏感地依赖于4夸克凝聚< 0| qqqq| 0 >和值< 0| qqqq| 0 > ~ 1.5< 0| QQ| 0 >^2再现了实验结果。

英文摘要：

Classic calculations of the magnetic moments mu_p and mu_n of the nucleons using the traditional exponential kernel show instability with respect to variations of the Borel mass as well as arbitrariness with respect to the choice of the onset of perturbative QCD. The use of a polynomial kernel, the coefficients of which are determined by the masses of the nucleon resonances stabilizes the calculation and provides much better damping of the unknown contribution of the nucleon continuum. The method is also applied to the evaluation of the coupling gA of proton to the axial current and to the strong part of the neutron-proton mass difference Delta M_np. All these quantities depend sensitively on the value of the 4-quark condensate < 0 | qqqq | 0 > and the value < 0 | qqqq | 0 > ~ 1.5< 0 | qq | 0 >^2 reproduces the experimental results.

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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