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arXiv · 1007.2220

J/Psi mass shift in nuclear matter

G. Krein·A. W. Thomas·K. Tsushima
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Abstract

The $J/\Psi$ mass shift in cold nuclear matter is computed using an effective Lagrangian approach. The mass shift is computed by evaluating $D$ and $D^*$ meson loop contributions to the $J/\Psi$ self-energy employing medium-modified meson masses. The modification of the $D$ and $D^*$ masses in nuclear matter is obtained using the quark-meson coupling model. The loop integrals are regularized with dipole form factors and the sensitivity of the results to the values of form-factor cutoff masses is investigated. The $J/\Psi$ mass shift arising from the modification of the $D$ and $D^*$ loops at normal nuclear matter density is found to range from -16 MeV to -24 MeV under a wide variation of values of the cutoff masses. Experimental perspectives for the formation of a bound state of $J/\Psi$ to a nucleus are investigated.

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G. Krein, A. W. Thomas, K. Tsushima. 2010-07-13. J/Psi mass shift in nuclear matter. https://doi.org/10.1016/j.physletb.2011.01.037

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