Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-07-13
Phys.Lett.B697:136-141,2011
Physics
Nuclear Physics
Nuclear Theory
9 pages, latex file, 6 figures. Version published in Phys. Lett. B
Scientific paper
10.1016/j.physletb.2011.01.037
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.
Krein Gastao
Thomas Anthony W.
Tsushima Kazuo
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