Starting from an earlier representation of the independent dimension-6 gluon operators in terms of color electric and magnetic fields, we estimate their changes near the critical temperature Tc using the temperature dependence of the dimension-4 electric and magnetic condensates extracted from pure gauge theory on the lattice. We then improve the previous QCD sum rules for the J/ψ mass near Tc based on dimension-4 operators, by including the contribution of the dimension-6 operators to the OPE. We find an enhanced stability in the sum rule and confirm that the J/ψ will undergo an abrupt change in the property across Tc.
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© 2016 American Physical Society.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)