Massive vector current correlator in thermal QCD

The Vector Current Correlator

The Mixed - Isospin Vector Current Correlator in ChiralPerturbation Theory and QCD

The mixed-isospin vector current correlator, h0jT(V V !)j0i is evaluated using both QCD sum rules and Chiral Perturbation Theory (ChPT) to one-loop order. The sum rule treatment is a modiication of previous analyses necessitated by the observation that those analyses produce forms of the correlator that fail to be dominated, near q 2 = 0, by the most nearby singularities. Inclusion of contribut...

Mass Corrections to the Vector Current Correlator †

Three-loop QCD corrections to the vector current correlator are considered. The large momentum procedure is applied in order to evaluate mass corrections up to order (m2/q2)6. The inclusion of the first seven terms to the ratio R = σ(e+e− → hadrons)/σ(e+e− → μ+μ−) leads to reliable predictions from the high energy region down to relatively close to threshold. PACS numbers: 12.38.-t, 12.38.Bx, 1...

AdS/QCD at the correlator level

We derive and analyze predictions of both the hard-wall and dilaton soft-wall AdS/QCD approximations for the scalar glueball correlator and decay constants. We confront the results with QCD information from the lattice, the operator product expansion (OPE), a hypothetical UV gluon mass associated with the short-distance behavior of the heavy-quark potential, and a low-energy theorem based on th...

8 AdS / QCD at the correlator level

We derive and analyze predictions of both the hard-wall and dilaton soft-wall AdS/QCD approximations for the scalar glueball correlator and decay constants. We confront the results with QCD information from the lattice, the operator product expansion (OPE), a hypothetical UV gluon mass associated with the short-distance behavior of the heavy-quark potential, and a low-energy theorem based on th...