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We study the potential energy between static charges in G(2) gluodynamics inthree and four dimensions. Our work is based on an efficient local hybridMonte-Carlo algorithm and a multi-level L\"uscher-Weisz algorithm withexponential error reduction to accurately measure expectation values of Wilson-and Polyakov loops. Both in three and four dimensions we show that atintermediate scales the string tensions for charges in variousG(2)-representations scale with the second order Casimir. In three dimensionsCasimir scaling is confirmed within one percent for charges in representationsof dimensions 7, 14, 27, 64, 77, 77', 182 and 189 and in 4 dimensions within 5percent for charges in representions of dimensions 7, 14, 27 and 64. In threedimensions we detect string breaking for charges in the two fundamentalrepresentations. The scale for string breaking agrees very well with the massof the created pair of glue-lumps.

Casimir Scaling and String Breaking in G(2) Gluodynamics