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Study of J/ψ mass shift and bound states: Impact of DD and DD* meson loops

Manpreet Kaur* and Arvind Kumar

  • *Contact author: ranapreeti803@gmail.com
  • Contact author: kumara@nitj.ac.in

Phys. Rev. D 114, 034022 – Published 11 August, 2026

DOI: https://doi.org/10.1103/6psj-44qv

Abstract

We investigate the modification of the J/ψ meson mass in asymmetric nuclear matter at zero and finite temperatures employing an effective Lagrangian approach that considers the contributions of DD and DD* meson loops. The medium dependence of D meson masses is determined using the hadronic chiral SU(3) model, where scalar condensates are calculated and subsequently utilized in the QCD sum rules approach. Our findings indicate that an increase in baryonic density results in a negative mass shift of the J/ψ meson. This suggests that the J/ψ meson is attracted to nuclear mean fields indicating the possibility of the formation of meson-nucleus bound states. Moreover, we have also determined the binding energy and absorption decay width of the J/ψ meson for both the ground and excited states of O16, Ca40, Zr90, and Pb208 nuclei. These results are expected to contribute to the understanding of experimental data from upcoming studies at Jefferson lab and the facility for antiproton and ion research, where low-momentum charmed mesons can be produced and examined within nuclei.

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