Abstract
We computed potentials between static color sources from the six lowest
representations of G(2) lattice gauge theory, in numerical simulations with the
Wilson action on asymmetric lattices with nonperturbatively estimated values of
the bare anisotropy. We present evidence for (approximate) Casimir scaling of
the obtained intermediate string tensions. The agreement with the
Casimir-scaling prediction improves by increasing the coupling beta in the
weak-coupling region above the crossover observed in G(2) gauge theory. The
result naturally fits into confinement models with magnetic disorder and vacuum
domain structure, but may represent a challenge for other approaches.
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