Model for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:math>absorption in hadronic matter

Abstract

The cross sections for $J/\ensuremath{\psi}$ absorption by $\ensuremath{\pi}$ and $\ensuremath{\rho}$ 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 $J/\ensuremath{\psi}$ absorption cross sections ${\ensuremath{\sigma}}_{\ensuremath{\pi}\ensuremath{\psi}}$ and ${\ensuremath{\sigma}}_{\ensuremath{\rho}\ensuremath{\psi}}$ 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.

Locations

• Physical Review C - View
• arXiv (Cornell University) - View - PDF
• DataCite API - View