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The two-point gauge-invariant correlation function of gluonic fieldstrengths, which is the main input in the stochastic vacuum model, is derivedby using its relation to the Green functions of one- and two-gluon gluelumps.These Green functions are found by evaluating the path integrals of one and twogluons confined in the field of an infinitely heavy adjoint source. This allowsone to obtain also the terms in the exponential asymptotics of the two-pointcorrelation function, which are produced by fluctuations of the gluons aroundtheir mean separation from the source. The pre-exponents are derived as well,demonstrating some novel dependences on the distance.Comment: 9 pages, no figure

Calculating the gauge-invariant two-point correlation function of gluonic field strengths