The $$D_sDK^*$$ Vertex in QCD Sum Rules: Form Factors and Coupling Constant

A comparative analysis for the form factors and coupling constant of the $D_s DK^*$ meson vertex

“…In this paper, we report the result of our study of the coupling constant for the vertex * using QCD Sum Rules (QCDSR) [1]. This vertex were also studied in previous works using different techniques such as SU(4), Light Cone Sum Rules (LCSR) [2], and a previous study also using QCD Sum Rules(QCDSR) [3].…”

“…In our QCDSR study of the vertex * we calculate the form factors for the three possible cases of off-shell mesons for this vertex: = , , * . The details of the calculation of this sum rule can be seen in [1].…”

“…The form factors were fitted to the numerical data computed as either a monopolar function, or an exponential function, as shown in Fig. (1). The form factors are chosen according to the best fit of each form factor to the numerical data.…”