ρD^*D^* vertex from QCD sum rules

Abstract

We calculate the form factors and the coupling constant in the $\rho D^{\ast }{D}^{\ast }$ vertex in the framework of QCD sum rules. We evaluate the three point correlation functions of the vertex considering both $\rho$ and $D^{\ast }$ mesons off--shell. The form factors obtained are very different but give the same coupling constant: $g_{\rho D^{\ast }{D}^{\ast }}=6.6\pm 0.31$. This number is 50% larger than what we would expect from SU(4) estimates.

9 pages, 6 eps figures

References in corpus (17)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Model for $J/\psi$ absorption in hadronic matter
• J/psi absorption by pi and rho mesons in a meson exchange model with anomalous parity interactions
• $D^{\ast }D\pi$ form factor revisited
• $D^{\ast }D\pi$ and $B^{\ast }B\pi$ form factors from QCD Sum Rules
• Hadronic scattering of charmed mesons
• Perturbative QCD Correction to the Light-Cone Sum Rule for the $B^{\ast }B\pi$ and $D^{\ast }D\pi$ Couplings
• The $J/\psi DD$ Vertex in QCD Sum Rules
• The Hidden Charm Decay of $X(3872),Y(3940)$ and Final State Interaction Effects
• Analysis of the vertices $D^{\ast }{D}_{s}K$, $D_s^{\ast }DK$,$D_0{D}_{s}K$ and $D_{s0}DK$ with the light-cone QCD sum rules
• D and rho Mesons: Who resolves whom?
• J/psi D*D* vertex from QCD sum rules
• $D^{\ast }{D}_{s}K$ and $D_s^{\ast }DK$ vertices in a QCD Sum Rule approach
• Analysis of the vertices D^*D^* P, D^*D V and DDV with light-cone QCD sum rules
• Hadronic form factors and the $J/\psi$ secondary production cross section: an update
• The $\omega DD$ vertex in a Sum Rule approach
• Analysis of the vertices $DDV$ and $D^{\ast }DV$ with light-cone QCD sum rules

Cited by in corpus (39)

• New Charmonium States in QCD Sum Rules: a Concise Review
• Rare Decays of Λ_b->Λ+ γand Λ_b ->Λ+ l^{+} l^{-} in the Light-cone Sum Rules
• Charm couplings and form factors in QCD sum rules
• Vector and axial-vector couplings of D and D* mesons in 2+1 flavor Lattice QCD
• Decay widths of the spin-2 partners of the X(3872)
• $D^{\ast }D\rho$ vertex from QCD sum rules
• Analysis of the strong coupling constant $G_{D_s^{\ast }{D}_s\varphi }$ and the decay width of $D_s^{\ast }\to D_s\gamma$ with QCD sum rules
• $B_s^{\ast }BK$ vertex from QCD sum rules
• Strong coupling constants of bottom and charmed mesons with scalar, pseudoscalar and axial vector kaons
• Interactions of the doubly charmed state $T_{cc}^{+}$ with a hadronic medium
• The B_{s0} meson and the B_{s0}B K coupling from QCD sum rules
• Strong decay of the heavy tensor mesons with QCD sum rules
• Couplings between the $\rho$ and $D$- and $D^{\ast }$-mesons
• The $g_{J/\psi D_s{D}_s}$ strong coupling constant from QCD Sum Rules
• $g_{D_s^{\ast }D{K}^{\ast }(892)}$ and $g_{B_s^{\ast }B{K}^{\ast }(892)}$ coupling constants in QCD sum rules
• $B^{\ast }{B}^{\ast }\rho$ vertex from QCD sum rules
• X(3872) as a molecular $D{\bar{D}}^{\ast }$ state in the Bethe-Salpeter equation approach
• Coupling constants of bottom (charmed) mesons with pion from three point QCD sum rules
• Analysis of hadronic coupling constants $G_{B_c^{\ast }{B}_c{\rm Y}}$, $G_{B_c^{\ast }{B}_{c}J/\psi }$, $G_{B_c{B}_c{\rm Y}}$ and $G_{B_c{B}_{c}J/\psi }$ with QCD sum rules
• On the Role of Charmed Meson Loops in Charmonium Decays
• Analysis of $D_{s}D{K}^{\ast }$ and $D_s{D}^{\ast }{K}^{\ast }$ vertices and branching ratio of $B^{+}\to {K^{\ast }}^0{\pi }^{+}$
• Resonance $X(4630)$
• Strong coupling constants and radiative decays of the heavy tensor mesons
• Investigation of the $D_s^{\ast }{D}_s{\eta }^{(\prime )}$ and $B_s^{\ast }{B}_s{\eta }^{(\prime )}$ vertices via QCD sum rules
• $B_{s1}^{\ast }{B}^{\ast }K$ form factor from QCD sum rules
• Charm meson couplings in hard-wall Holographic QCD
• The strong vertices of charmed mesons $D$, $D^{\ast }$ and charmonia $J/\psi$, ${\eta }_c$
• Analysis of the strong coupling form factors of ${\Sigma }_{b}NB$ and ${\Sigma }_{c}ND$ in QCD sum rules
• A QCD sum rules calculation of the ${\eta }_c{D}^{\ast }D$ and ${\eta }_c{D}_s^{\ast }{D}_s$ form factors and strong coupling constants
• The $D^{\ast }/D$ ratio in heavy ion collisions
• Analysis of the strong vertices of ${\Sigma }_{c}N{D}^{\ast }$ and ${\Sigma }_{b}N{B}^{\ast }$ in QCD sum rules
• Analysis of $D_s^{\ast }{D}^{\ast }{K}^{\ast }$ and $D_{s1}{D}_1{K}^{\ast }$ vertices in three-point sum rules
• The strong vertices of bottom mesons $B$, $B^{\ast }$ and bottomonia ${\rm Y}$, ${\eta }_b$
• Analysis of the strong vertexes of ${\Sigma }_c^{\ast }ND$ and ${\Sigma }_b^{\ast }NB$ in QCD sum rules
• Strong coupling constant of vector bottomonium to the pseudoscalar and vector $B_c$ mesons via QCD sum rules
• Heavy-meson chiral Lagrangians, effective flavored couplings, SU(4) flavor breaking and their consequences
• On the eta(b) => J/psi J/psi decay
• Strong coupling constants of charmed and bottom mesons with light vector mesons in QCD sum rules
• Dispersive Analysis of $D$- and $B$-Meson Form Factors with Chiral and Heavy-Quark Constraints