Wei-qin Zhao | Searcharxiv

arXiv2006

Landau gauge condensates from global color model

We compute the dimension-2 gluon pair condensate $g^2<{AA}>$ and the dimension-4 mixed quark-gluon condensate $<\bar{q}gA\cdotγ{q}>$ in Landau gauge within the framework of global color model. The result for the dynamical gluon mass is within the range given by other independent determinations. The obtained mixed Landau gauge condensate $<\bar{q}gA\cdotγ{q}>$ is clearly dependent on the definitions of the condensates. We show that the consistent result may be obtained when the same definitions are used.

hep-ph↗

arXiv2004

Mixed tensor susceptibility of the QCD vacuum from effective quark-quark interactions

We calculate the mixed tensor susceptibility of QCD vacuum in the framework of the global color symmetry model. In our calculation, the functional integration over gluon fields can be performed and the gluonic vacuum observable can be expressed in terms of the quark operators and the gluon propagator. The mixed tensor susceptibility was obtained with the subtraction of the perturbative contribution which is evaluated by the Wigner solution of the quark gap equation. Using several different effective quark-quark interaction models, we find the values of the mixed tensor susceptibility are very small.

hep-ph↗