J/psi absorption by nucleons in the meson-exchange model

Abstract

We reinvestigate the $J/\psi$ dissociation processes induced by the reactions with nucleons, $J/\psi +N\to {\bar{D}}^{(\ast )}+{\Lambda }_c$, in the meson-exchange model. Main constraints used in this work are vector-meson dominance and charm vector-current conservation. We show that the cross section for $J/\psi +N\to \bar{D}+{\Lambda }_c$ can be larger than that for $J/\psi +N\to {\bar{D}}^{\ast }+{\Lambda }_c$ when these constraints are imposed. The dependence of the cross sections on the coupling constants is analyzed in detail, and the comparison with the recent quark-interchange model predictions is also made.

7 pages, 4 figures, REVTeX, a reference added, to appear in Phys. Rev. C

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• Deciphering the mechanism of near-threshold $J/\psi$ photoproduction
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• Towards a dynamical understanding of the non-$D\bar{D}$ decay of $\psi (3770)$
• Λ_{c} enhancement from strongly coupled quark-gluon plasma
• Strong three-body decays of Lambdac(2940)+
• Production of charmed baryon ${\Lambda }_c(2940{)}^{+}$ at PANDA
• Open charm effects in $e^{+}{e}^{-}\to J/\psi \eta$, $J/\psi {\pi }^0$ and $\varphi {\eta }_c$
• The $g_{J/\psi D_s{D}_s}$ strong coupling constant from QCD Sum Rules
• Charmonium production in antiproton-nucleus reactions at low energies
• Possible contributions to $e^{+}{e}^{-}\to J/\psi +{\eta }_c$ due to intermediate meson rescatterings
• Lineshape of $e^{+}{e}^{-}\to D^{\ast }\bar{D}+c.c.$ and electromagnetic form factor of $D^{\ast }\to D$ transition in the time-like region
• A QCD sum rules calculation of the $J/\psi D_s^{\ast }{D}_s$ strong coupling constant
• Combined study of the isospin-violating decay $D_s^{\ast }\to D_s{\pi }^0$ and radiative decay $D_s^{\ast }\to D_s\gamma$ with intermediate meson loops
• Rescattering effects in antiproton-induced exclusive $J/\psi$ and ${\psi }^{\prime }$ production on the deuteron
• In-medium $J/\psi$ mass shift by the $D$ meson loop effect