X iv : h ep - p h / 03 03 12 0 v 1 1 4 M ar 2 00 3 QCD potential as a “ Coulomb – plus – linear ” potential

ar X iv : h ep - t h / 02 03 13 3 v 1 1 4 M ar 2 00 2 Green Function for a Spin 1 2 Particle in a Coulomb + Scalar Potential

We calculate the Green function for the Dirac equation describing a spin 1/2 particle in the presence of a potential which is a sum of the Coulomb potential VC = −A1/r and a Lorentz scalar Vs = −A2/r. The bound state spectrum is obtained. PACS numbers:03.65.Pm,03.65.Ge ⋆ e-mail:[email protected]

ar X iv : h ep - p h / 03 06 03 0 v 2 30 J un 2 00 3 Confinement and gluon propagator in Coulomb gauge QCD

We consider the effects of the Faddeev-Popov determinant in the Coulomb gauge on the confinement properties of the QCD vacuum. We show that the the determinant is needed to regularize the otherwise divergent functional integrals near the Gribov horizon but still enables large field configurations to generate IR enhanced running coupling. The physical gluon propagator is found to be strongly sup...

ar X iv : h ep - p h / 03 12 27 6 v 1 1 9 D ec 2 00 3 The a 0 K + K − - vertex in light cone QCD sum rules

ar X iv : h ep - p h / 00 03 13 7 v 1 1 4 M ar 2 00 0 Conformal Phase Transition , β - Function , and Infrared Dynamics in QCD

The dynamics in QCD with different number of fermion flavors N f is discussed. The emphasis is on the description of the conformal phase transition with respect to N f separating a phase with no confinement and chiral symmetry breaking and a phase with confinement and with chiral symmetry breaking.

ar X iv : h ep - t h / 03 12 24 4 v 1 1 9 D ec 2 00 3 FIAN / TD / 07 – 03 On Sp ( 2 M ) Invariant Green Functions

Explicit form of two-point and three-point Sp (2M) invariant Green functions is found.