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2012

Quark condensate for various heavy flavors

Antonov, Dmitri, Ribeiro, Jose Emilio F. T.

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The quark condensate is calculated within the world-line effective-action formalism, by using for the Wilson loop an ansatz provided by the stochastic vacuum model.

Starting with the relation between the quark and the gluon condensates in the heavy-quark limit, we diminish the current quark mass down to the value of the inverse vacuum correlation length, finding in this way a 64%-decrease in the absolute value of the quark condensate.
In particular, we find that the conventional formula for the heavy-quark condensate cannot be applied to the c-quark, and that the corrections to this formula can reach 23% even in the case of the b-quark.
We also demonstrate that, for an exponential parametrization of the two-point correlation function of gluonic field strengths, the quark condensate does not depend on the non-confining non-perturbative interactions of the stochastic background Yang-Mills fields.

Quark condensate for various heavy flavors · Around

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Then

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D. Antonov and J. E. F. T. Ribeiro, Phys. Rev. D 81
2010
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D. Antonov, Annals Phys. 325
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