22-27 March 2015
Hotel do Bosque
Brazil/East timezone

A QCD sum rules calculation of the J/ψD∗sDs strong coupling constant

Not scheduled
3h 30m
Hotel do Bosque

Hotel do Bosque

Rodovia Mário Covas (Rio-Santos) BR - 101 Sul, Km 533, Angra dos Reis, RJ, Brazil
Poster Hadronic structure - reactions, production and decays




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 $g_{J/ψ D^∗_s D_s} = 4.30^{+0.42}_{−0.37}GeV^{−1}$.

Primary author


Prof. Marcelo Chiapparini (UERJ) Prof. mirian bracco (UERJ) Prof. Ângelo CERQUEIRA JR (UNIFOA)

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