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Connected two-point field strength correlators have been measured on thelattice in quaternionic projective sigma-model of pure SU(2) Yang-Mills theory.The correlation lengths, extracted from the exponential fit for thesecorrelators, are found to be lambda_1^{-1} = 1.40(3) GeV and lambda^{-1} =1.51(3) GeV in good agreement with other existing calculations. The dependenceof bilocal functions on the connector shape was studied.

Nonlocal field correlators on the lattice in HP^1 sigma-model