Dual Superconductor Scenario of Confinement: A Systematic Study of   Gribov Copy Effects
  We perform a study of the effects from maximal abelian gauge Gribov copies in the context of the dual superconductor scenario of confinement, on the basis of a novel approach for estimation of systematic uncertainties from incomplete gauge fixing. We present numerical results, in SU(2) lattice gauge theory, using the overrelaxed simulated annealing gauge fixing algorithm. We find abelian and non-abelian string tensions to differ significantly, their ratio being 0.92(4) at BETA = 2.5115. An approximate factorization of the abelian potential into monopole and photon contributions has been confirmed, the former giving rise to the abelian string tension. 
G.S. Bali (Southampton), V. Bornyakov (Kanazawa, IHEP Protvino), M.   Mueller Preussker (HU Berlin) and K. Schilling (HLRZ J...