2016年6月
Compositeness of the $\Delta (1232)$ resonance in $\pi N$ scattering
JPS conference proceedings
- ,
- ,
- ,
- 巻
- 未
- 号
- 未
- 開始ページ
- 未
- 終了ページ
- 未
- 記述言語
- 掲載種別
- 研究論文(国際会議プロシーディングス)
We evaluate the $\pi N$ compositeness of the $\Delta (1232)$ resonance so as<br />
to clarify the internal structure of $\Delta (1232)$ in terms of the $\pi N$<br />
component. Here the compositeness is defined as contributions from two-body<br />
wave functions to the normalization of the total wave function and is extracted<br />
from the $\pi N$ scattering amplitude. In this study we employ the chiral<br />
unitary approach with the interaction up to the next-to-leading order plus a<br />
bare $\Delta$ term in chiral perturbation theory and describe $\Delta (1232)$<br />
in an elastic $\pi N$ scattering. Fitting the $\pi N$ scattering amplitude to<br />
the solution of the partial wave analysis, we obtain a large real part of the<br />
$\pi N$ compositeness for $\Delta (1232)$ comparable to unity and<br />
non-negligible imaginary part as well, with which we reconfirm the result in<br />
the previous study on the $\pi N$ compositeness for $\Delta (1232)$.
to clarify the internal structure of $\Delta (1232)$ in terms of the $\pi N$<br />
component. Here the compositeness is defined as contributions from two-body<br />
wave functions to the normalization of the total wave function and is extracted<br />
from the $\pi N$ scattering amplitude. In this study we employ the chiral<br />
unitary approach with the interaction up to the next-to-leading order plus a<br />
bare $\Delta$ term in chiral perturbation theory and describe $\Delta (1232)$<br />
in an elastic $\pi N$ scattering. Fitting the $\pi N$ scattering amplitude to<br />
the solution of the partial wave analysis, we obtain a large real part of the<br />
$\pi N$ compositeness for $\Delta (1232)$ comparable to unity and<br />
non-negligible imaginary part as well, with which we reconfirm the result in<br />
the previous study on the $\pi N$ compositeness for $\Delta (1232)$.
- ID情報
-
- arXiv ID : arXiv:1510.08686