We derive an analytical expression for the two-gluon production in the pA(light-heavy) collisions, and focus specifically on the rapidity dependentpart. We approximate the gauge field from the heavy target as the Color GlassCondensate which interacts with the light projectile whose source densityallows for a perturbative expansion. We discuss the longitudinal correlationsof produced particles. Our calculation goes in part beyond the eikonal limitfor the emitted gluons so that we can retain the exponential terms with respectto the rapidity difference. Our expression can thus describe the short-rangecorrelations as well as the long-range ones for which our formula is reduced tothe known expression. In a special case of two high-pt gluons in theback-to-back kinematics we find that dependence on the rapidity separation isonly moderate even in the diagrammatically connected part.
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