vertex from QCD sum rules

✍ Scribed by B. Osório Rodrigues; M.E. Bracco; M. Nielsen; F.S. Navarra

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 248 KB
• Volume: 852
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2011.01.001

✦ Synopsis

We calculate the form factors and the coupling constant in the D * Dρ vertex in the framework of QCD sum rules. We evaluate the three-point correlation functions of the vertex considering D, ρ and D * mesons off-shell. The form factors obtained are very different but give the same coupling constant: g D * Dρ = 4.3 ± 0.9 GeV -1 .