2002/08/31 by C. M. Ko, Che Ming Ko, Su Houng Lee · 4 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.67.038202
published as Phys.Rev.C67:038202,2003 · 4 pages, 1 figure, revtex, revised version to be published in Phys. Rev. C
arxiv created 2003/02/27 · openalex publication_date 2003/03/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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/\ensuremathψ in nuclear matter decreases only slightly, those of \ensuremathψ(3686) and \ensuremathψ(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.