Speaker
Dr
Sergi Gonzàlez-Solís
(Indiana University)
Description
The scalar and vector meson exchange contributions to the doubly radiative decays
$\eta^{(\prime)}\to\pi^0\gamma\gamma$ and $\eta^\prime\to\eta\gamma\gamma$
are analysed within the Linear Sigma Model and Vector Meson Dominance frameworks, respectively.
Predictions for the diphoton invariant mass spectra and the associated integrated
branching ratios are given and compared with current available experimental data.
While a satisfactory description of the shape of the $\eta\to\pi^{0}\gamma\gamma$ and $\eta^\prime\to\pi^{0}\gamma\gamma$ decay spectra is obtained, thus supporting the validity of the approach, the corresponding branching ratios cannot be reproduced simultaneously. A first theoretical prediction for the recently measured $\eta^\prime\to\eta\gamma\gamma$ by the BESIII collaboration is also presented.
Primary author
Dr
Sergi Gonzàlez-Solís
(Indiana University)
Co-authors
Mr
Emilio Royo
(IFAE, Autonomous University of Barcelona)
Rafel Escribano
(Universitat Autonoma de Barcelona)
Dr
Renate Jora
(National Institute of Physics and Nuclear Engineering, Romania)
