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We start with a particular cosmological model derived from type IIBsupergravity theory with fluxes, where usually the dilaton is interpreted as aQuintessence field. Instead of that, in this letter we interpret the dilaton asthe dark matter of the universe. With this alternative interpretation we findthat in this supergravity model gives a similar evolution and structureformation of the universe compared with the $\Lambda$CDM model in the linearregime of fluctuations of the structure formation. Some free parameters of thetheory are fixed using the present cosmological observations. In the non-linearregimen there are some differences between the type IIB supergravity theorywith the traditional CDM paradigm. The supergravity theory predicts theformation of galaxies earlier than the CDM and there is no density cusp in thecenter of galaxies. These differences can distinguish both models and can givea distinctive feature to the phenomenology of the cosmology coming fromsuperstring theory with fluxes.Comment: 7 pages, 5 figures, references added, minor modifications, typos  corrected. Version accepted for publication in IJMP

AN ALTERNATIVE INTERPRETATION FOR THE MODULI FIELDS OF THE COSMOLOGY ASSOCIATED TO TYPE IIB SUPERGRAVITY WITH FLUXES