Determining Compositeness of Hadronic Resonances: the $\Lambda (1405)$ Radiative Decay and the $a_0(980)$-$f_0(980)$ Mixing

Abstract

Recently the concept of compositeness has been developed so as to distinguish whether interested hadrons are hadronic molecules or not. Here, in terms of compositeness, we investigate $\bar{K}N$ molecular structure of the $\Lambda (1405)$ resonance with the $\Lambda (1405)$ radiative decay and $K\bar{K}$ molecular structure of the $a_0(980)$ and $f_0(980)$ resonances with the $a_0(980)$-$f_0(980)$ mixing.

Comments: 6 pages, 4 figures, Presentation given at the 2nd International Symposium on Science at J-PARC (J-PARC 2014), Tsukuba, Japan, July 12-15, 2014