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2016

Revised variational approach to QCD in Coulomb gauge

Campagnari, Davide R., Ebadati, Ehsan, Reinhardt, Hugo et al.

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The variational approach to QCD in Coulomb gauge is revisited.

By assuming the non-Abelian Coulomb potential to be given by the sum of its infrared and ultraviolet parts, i.e.~by a linearly rising potential and an ordinary Coulomb potential, and by using a Slater determinant ansatz for the quark wave functional, which contains the coupling of the quarks and the gluons with two different Dirac structures, we obtain variational equations for the kernels of the fermionic vacuum wave functional, which are free of ultraviolet divergences.
Thereby, a Gaussian type wave functional is assumed for the gluonic part of the vacuum.
By using the results of the pure Yang--Mills sector for the gluon propagator as input, we solve the equations for the fermionic kernels numerically and calculate the quark condensate and the effective quark mass in leading order.

Revised variational approach to QCD in Coulomb gauge · Around

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