Year: 2006
Type: article
Abstract: A recently developed nonperturbative chiral approach to dynamically generate the $3/{2}^{\ensuremath{-}}$ baryon resonances has been extended to investigate the radiative decays ${\ensuremath{\Lambda}}^{*}(1520)\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\Lambda}(1116)$ and ${\ensuremath{\Lambda}}^{*}(1520)\ensuremath{\rightarrow}\ensuremath{\gamma}{\ensuremath{\Sigma}}^{0}(1193)$. We show that the ${\ensuremath{\Lambda}}^{*}(1520)$ decay into $\ensuremath{\gamma}\ensuremath{\Lambda}$ is an ideal test for the need of extra components of the resonance beyond those provided by the chiral approach since the largest meson-baryon components give no contribution to this decay. The case is different for $\ensuremath{\gamma}\ensuremath{\Sigma}$ decay, where the theory agrees with experiment, though the large uncertainties of these data call for more precise measurements. Some estimates of the weight of the needed genuine resonance component are made.
Source: Physical Review C
Authors: M. Döring, E. Oset, Sourav Sarkar
Language: Latvian
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W362695466