Model for $J/ψ$ absorption in hadronic matter

Details Model for $J/ψ$ absorption in hadronic matter Model for $J/ψ$ absorption in hadronic matter

1999-12-20

arxiv.org/abs/nucl-th/9912046v4

Phys.Rev.C62:034903,2000

Physics

Nuclear Physics

Nuclear Theory

Appendix B added to show detailed comparisons, and meson matrices chosen to be traceless

Scientific paper

10.1103/PhysRevC.62.034903

The cross sections for $J/\psi$ absorption by $\pi$ and $\rho$ mesons are studied in a meson-exchange model that includes not only pseudoscalar-pseudoscalar-vector-meson couplings but also three-vector-meson and four-point couplings. We find that they are much larger than in a previous study where only pseudoscalar-pseudoscalar-vector-meson couplings were considered. Including form factors at interaction vertices, the $J/\psi$ absorption cross sections $\sigma_{\pi \psi}$ and $\sigma_{\rho \psi}$ are found to have values on the order of 7 mb and 3 mb, respectively. Their thermal averages in hadronic matter at temperature T=150 MeV are, respectively, about 1 mb and 2 mb.

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