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J/psi and eta_c in the nuclear medium: QCD sum rule approach

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arxiv nucl-th/9811070 v2 pith:LMWFZWK4 submitted 1998-11-20 nucl-th hep-ph

classification nucl-thhep-ph
keywords nucleargluonmassesmattermediumoperatorapproacharise
verification ladder T0 review T1 audit T2 compute T3 formal

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We investigate the masses of the lowest c\bar{c} states, the J/psi and eta_c, in nuclear matter using QCD sum rules. Up to dimension four, the differences between the operator product expansions in vacuum and in medium arise from the density-dependent change in the gluon condensate and from a new contribution proportional to the nucleon expectation value of the twist-2 gluon operator. Both terms together give an attractive shift of about 5-10 MeV to the J/psi and eta_c masses in nuclear matter.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Medium modifications of $1P$-wave charmonia $\chi_{cJ}(1P)$ in cold nuclear matter

    hep-ph 2025-10 conditional novelty 6.0 of 10

    χcJ(1P) masses drop by 34–97 MeV in nuclear matter in the QMC+unquenched-loop model, with the D*D̄* loop dominating χc2 and no D-D̄ threshold crossing below 3ρ0.

  2. Charmonium production at SPS and FAIR energies

    hep-ph 2026-05 unverdicted novelty 4.0 of 10

    Remler formalism with in-medium heavy-quark potential describes charmonium yields at SPS energies and supplies estimates for FAIR energies after calibration on p+p and p+A collisions.

  3. Heavy-heavy and heavy-light mesons in cold nuclear matter

    nucl-th 2025-06 conditional novelty 3.0 of 10

    Using the quark-meson coupling model and effective Lagrangians, heavy and heavy-light mesons are predicted to feel attractive potentials in nuclei and form bound states, including new B_c-nucleus states.

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