Anisotropy of dark matter annihilation with respect to the Galactic plane

We describe the anisotropy of dark matter clump distribution caused by tidal destruction of clumps in the Galactic disk. A tidal destruction of clumps with orbit planes near the disk plane occurs more efficiently compared with destruction of clumps at near-polar orbits. A corresponding annihilation of dark matter particles in small-scale clumps produces the anisotropic gamma-ray signal with respect to the Galactic disk. This anisotropy is rather small, similar to 9%, and is superimposed on that due to the off-centered position of the Sun in the Galaxy. The anisotropy of the annihilation signal with respect to the Galactic disk provides the possibility to discriminate dark matter annihilation from the diffuse gamma-ray backgrounds of other origin.