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The detection of gamma-rays from the source HESS J1745-290 in the GalacticCenter (GC) region with the H.E.S.S. array of Cherenkov telescopes in 2004 ispresented. After subtraction of the diffuse gamma-ray emission from the GCridge, the source is compatible with a point-source with spatial extent lessthan 1.2'(stat.) (95% CL). The measured energy spectrum above 160 GeV iscompatible with a power-law with photon index of 2.25 +/- 0.04(stat.) +/- 0.10(syst.) and no significant flux variation is detected. These measurements arediscussed in the framework of dark matter annihilation. It is found that thebulk of the VHE emission must have non-dark-matter origin. Loose constraints onthe velocity-weighted annihilation cross section <sigma.v> are derived assumingthe presence of an astrophysical non-dark-matter gamma-ray contribution.Comment: 5 pages, 2 figures, published in Physical Review Letters Correct some  references The accepted version set on astro-ph was slightly too long for  publication. This is a slightly shorter versio

HESS Observations of the Galactic Center Region and Their Possible Dark Matter Interpretation