J/ψDD vertex from QCD sum rules

J/ψDD vertex from QCD sum rules

We calculated the strong form factor and coupling constant for the J/ψD*D* vertex in a QCD sum rule calculation. We performed a double Borel sum rule for the three point correlation function of vertex considering both J/ψ and D* mesons off-shell. The form factors obtained are very different, but the...

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Veröffentlicht in:Physics letters. B 2005-01, Vol.605 (3-4), p.326-334
Hauptverfasser: Bracco, M.E., Chiapparini, M., Navarra, F.S., Nielsen, M.
Format: Artikel
Sprache:eng
Schlagworte:
Charmed mesons
Exact sciences and technology
General theory of fields and particles
Mesons
Other nonperturbative calculations
Physics
Properties of specific particles
Quantum chromodynamics
S matrix theory
analytic structure of amplitudes
Specific theories and interaction models
particle systematics
Sum rules
The physics of elementary particles and fields
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Zusammenfassung:We calculated the strong form factor and coupling constant for the J/ψD*D* vertex in a QCD sum rule calculation. We performed a double Borel sum rule for the three point correlation function of vertex considering both J/ψ and D* mesons off-shell. The form factors obtained are very different, but they give the same coupling constant.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2004.11.024