Speaker
Guido Tempestilli
(INFN Roma Tre)
Description
We study the charmonia 1S vector channel decays, corroborating the estimate for the $J/\psi \rightarrow \eta_c \gamma$ decay and performing detailed analysis of the $\eta_c$-pole contribution to the $J/\psi \rightarrow \gamma \eta_c^\ast \rightarrow \nu\bar{\nu}$ decay rate.
We also present our results for the mean square radii $\langle r_{J/\psi}^2 \rangle$ and $\langle r_{\eta_c}^2 \rangle$ and our updated calculation of the $f_{J/\psi}$ and $f_{\eta_c}$ decay constants.
As a way to simulate b-quark physics, we extrapolate our results via intermediate-mass simulations, providing an estimate of the form factor relevant to the $h_b \rightarrow \eta_b \gamma$ decay.
Authors
Francesco Sanfilippo
(INFN Roma Tre)
Guido Tempestilli
(INFN Roma Tre)