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Charmonium mass in nuclear matter

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arxiv nucl-th/0208003 v2 pith:FWK327VH submitted 2002-08-02 nucl-th

Charmonium mass in nuclear matter

classification nucl-th
keywords nuclearmattermasscharmoniumstateseffectleading-ordershift
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The mass shift of charmonium states in nuclear matter is studied in the perturbative QCD approach. The leading-order effect due to the change of gluon condensate in nuclear matter is evaluated using the leading-order QCD formula, while the higher-twist effect due to the partial restoration of chiral symmetry is estimated using a hadronic model. We find that while the mass of $J/\psi$ in nuclear matter decreases only slightly, those of $\psi(3686)$ and $\psi(3770)$ states are reduced appreciably. Experimental study of the mass shift of charmonium states in nuclear matter can thus provide valuable information on the changes of the QCD vacuum in nuclear medium.

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

    hep-ph 2025-10 conditional novelty 6.0

    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.