The strength of the J/ψ wave function at origin |ψ(0)| is calculated by using the finite temperature QCD sum rule with the gluon condensates determined from the lattice QCD. The result is compared with that from a potential model based on the static free or internal energy obtained from lattice calculations. We find that the |ψ(0)| decreases with temperature around the deconfinement transition temperature both in the QCD sum rule and in the potential model with the free energy potential. Our result thus suggests that the free energy potential from lattice calculations is appropriate for describing the properties of charmonia at finite temperature.
Bibliographical noteFunding Information:
This work was supported in part by the Korean Research Foundation under Grant Nos. KRF-2011-0020333 and KRF-2011-0030621 , the Yukawa International Program for Quark-Hadron Sciences at Kyoto University and the Grant-in-Aid for Scientific Research from JSPS No. 24540271 , the Polish Science Foundation ( NCN ), under Maestro grant 2013/10/A/ST2/00106 , HIC for FAIR , and the DFG BR 4000/3-1 as well as the US National Science Foundation under Grant No. PHY-1068572 , the U.S. Department of Energy under Contract No. DE-FG02-10ER41682 within the framework of the JET Collaboration, and the Welch Foundation under Grant No. A-1358 .
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics