论文标题
Pion-Nucleon Sigma术语$σ_{πn} $和深度绑定的Pionic Atoms
Pion-nucleon sigma term $σ_{πN}$ and deeply bound pionic atoms
论文作者
论文摘要
我们调查了确定Pion-Nucleon Sigma项$σ_{πn} $的可能性，这是由深层绑定的Pionic Atoms的实验可观察到的。我们讨论了可观察到的对$σ_{πn} $的敏感性，并考虑了深层pionic原子的最新实验的典型错误。我们发现，通过实验数据确定$σ_{πn} $值确定$σ_{πn} $值的结合能的间隙和深层绑定态的宽度是可观察的。我们还讨论了由于$σ$项与Pion-Nucleus光学势中$σ$项之间的相关性，因此准确确定$σ_{πn} $的值的预期困难。
We investigate the possibility to determine the value of the pion-nucleon sigma term $σ_{πN}$ precisely by the experimental observables of the deeply bound pionic atoms. We discuss the sensitivity of the observables to $σ_{πN}$ and take into account the typical errors of the up-to-date experiments of the deeply bound pionic atoms. We find that the gap of the binding energies and the width of the deeply bound pionic states are good observables for the $σ_{πN}$ value determination by the experimental data. We also discuss the expected difficulties for the accurate determination of the value of $σ_{πN}$ due to the correlation between the $σ$ term and the potential parameter in the pion-nucleus optical potential.
