Singular gauge potentials and the gluon condensate at zero temperature
Abstract
We consider a new cooling procedure which separates gluon degrees of freedom from singular center vortices in SU(2) LGT in a gauge invariant way. Restricted by a cooling scale κ ^{4}/σ ^{2} fixing the residual SO(3) gluonic action relative to the string tension, the procedure is RG invariant. In the limit κ → 0 a pure Z(2) vortex texture is left. This minimal vortex content does not contribute to the string tension. It reproduces, however, the lowest glueball states. With an action density scaling like a^{4} with β, it defines a finite contribution to the action density at T = 0 in the continuum limit. We propose to interpret this a mass dimension 4 condensate related to the gluon condensate. Similarly, this vortex texture is revealed in the Landau gauge.
 Publication:

Nuclear Physics B Proceedings Supplements
 Pub Date:
 March 2002
 DOI:
 10.1016/S09205632(01)018072
 arXiv:
 arXiv:heplat/0110055
 Bibcode:
 2002NuPhS.106..658L
 Keywords:

 High Energy Physics  Lattice
 EPrint:
 3 pages, 4 figures, Contribution to ''Lattice 2001'' (confinement) to appear in the Proceedings (Nucl. Phys. B Proc. Suppl.)