Speaker
Prof.
Ângelo CERQUEIRA JR
(UNIFOA)
Description
In this work, we calculate the form factors and the coupling constant of the strange-charmed
vertex $J/ψD^∗_s D_s$ in the framework of the QCD sum rules by studying their three-point correlation
functions. All the possible off-shell cases are considered, $D_s$, $D^∗_s$ and $J/ψ$, resulting in three different
form factors. These form factors are extrapolated to the pole of their respective off-shell mesons,
giving the same coupling constant for the process. Our final result for the $J/ψD^∗_s D_s$ coupling
constant is $g_{J/ψ D^∗_s D_s} = 4.30^{+0.42}_{−0.37}GeV^{−1}$.
Author
Dr
Bruno Osorio Rodrigues
(CBPF)
