Formation spectra of pionic atoms in the Green's function method
Formation spectra of pionic atoms in the Green's function method
复制标题
格林函数法中π原子的形成谱
DOI：
10.1093/ptep/ptv013
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发表时间：
2015
影响因子：
3.5
通讯作者：
S. Hirenzaki
中科院分区：
文献类型：
--
作者：
N. Ikeno;J. Yamagata-Sekihara;H. Nagairo;S. Hirenzaki
我们研究了深束缚的π原子的形成光谱的（He）反应中使用的绿色函数方法，最近的发展在实验技术的刺激。绿色函数方法被认为是一个更好的理论形式比有效数的方法来评估不稳定系统的形成率。比较了各种情况下用绿色函数法和有效数法的计算结果。我们发现，这两种方法得到的结果之间的差异是合理的小，我们可以重申，有效数的方法是一个很好的理论方法，用于分析以前的实验数据与典型的结合能误差keV的深束缚的π原子。另一方面，我们认为，理论结果使用绿色函数方法将是必要的，在不久的将来推出精确的信息，在核的π介子性质的分析的介子原子数据比以前更好的精度。
We study the formation spectra of deeply bound pionic atoms in the (He) reactions using the Green's function method, stimulated by recent developments in experimental techniques. The Green's function method is considered to be a better theoretical formalism than the effective number approach to evaluate the formation rate of unstable systems. We compare the calculated results by the Green's function method with those by the effective number approach in various cases. We find that the differences between the results obtained by both methods are reasonably small and we can reaffirm that the effective number approach is a good theoretical method for the analyses of the previous experimental data with typical binding-energy errors ofkeV for the deeply bound pionic atoms. On the other hand, we think that theoretical results using the Green's function method will be necessary in the near future to deduce precise information on the pion properties in nuclei from analyses of the pionic atom data with better accuracy than before.