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

Cited by in corpus (1)

• Λ_{c} enhancement from strongly coupled quark-gluon plasma