2008/02/29 by Su Houng Lee, Kenji Morita
Physics and Astronomy · #Algorithm #Computer science #Condensed matter physics #High-Energy Particle Collisions Research #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Phase transition #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevd.79.011501
5 pages, 4 figures, revised version to appear in Phys.Rev.D
arxiv created 2009/01/09 · openalex publication_date 2009/01/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Starting from the temperature dependencies of the energy density and pressure from lattice QCD calculation, we extract the temperature dependencies of the electric and magnetic condensate near Tc. While the magnetic condensate hardly changes across Tc, we find that the electric condensate increases abruptly above Tc. This induces a small but equally abrupt decrease in the mass of J/\ensuremathψ, which can be calculated through the second-order Stark effect. Combining the present result with the previously determined QCD sum rule constraint, we extract the thermal width of J/\ensuremathψ above Tc, which also increases fast. These changes can be identified as the critical behavior of J/\ensuremathψ across Tc associated with the phase transition. We find that the mass shift and width broadening of J/\ensuremathψ at 1.05Tc will be around \ensuremath-100 MeV and 100 MeV, respectively.