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Dark matter (DM) constitutes around a 25% of the Universe, while baryons onlya 4%. DM can be reasonably assumed to be made of particles, and many theories(Super-symmetry, Universal Extra Dimensions, etc.) predict Weakly InteractingMassive Particles (WIMPs) as natural DM candidates at the weak scale.Self-annihilation (or decay) of WIMPs might produce secondary gamma-rays, viahadronization or as final state radiation. Since its launch in the 2008, theLarge Area Telescope on-board of the Fermi gamma-ray Space Telescope hasdetected the largest amount of gamma-rays to date, in the 20MeV 300GeV energyrange, allowing to perform a very sensitive indirect experimental search for DM(by means of high-energy gamma-rays). DM forms large gravitationally boundedstructures, the halos, which can host entire galaxies, such as the Milky Way.The DM distribution in the central part of the halos is not experimentallyknow, despite a very large density enhancement might be present. As secondarygamma rays production is very sensitive to WIMP density, a very effectivesearch can be performed from the regions where the largest density is expected.Therefore the information provided by the DM halo N-body simulations arecrucial. The largest gamma-ray signal from DM annihilation is expected from thecentre of the Galaxy. In the same region a large gamma-ray background isproduced by bright discrete sources and the cosmic-rays interacting with theinterstellar gas and the photons fields.  Here we report an update of the indirect search for DM from the GalacticCenter (GC).

The Indirect Search for Dark Matter from the centre of the Galaxy with the Fermi LAT