論文

査読有り
2016年6月

Compositeness of the $\Delta (1232)$ resonance in $\pi N$ scattering

JPS conference proceedings
  • T. Sekihara
  • ,
  • T. Arai
  • ,
  • J. Yamagata-Sekihara
  • ,
  • S. Yasui

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終了ページ
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 $\Delta (1232)$.

リンク情報
arXiv
http://arxiv.org/abs/arXiv:1510.08686
URL
http://arxiv.org/abs/1510.08686v1
ID情報
  • arXiv ID : arXiv:1510.08686

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