Nnlo Analysis of Unpolarized Dis Structure Functions

The increasing accuracy of DIS experiments will further reduce the experimental errors on the determination of the strong coupling constant calling for an improvement on the theoretical errors, which are by now the dominant ones. One way to achieve it is to include NNLO QCD effects in the analysis. Our goal is to perform a NNLO QCD analysis of World data on unpolarized DIS structure functions to determine αs with an accuracy of O(2%) along with a parametrization of the parton distribution functions with fully correlated errors. As a first step in this direction we concentrate on the nonsinglet (NS) sector. We presented the first results of our analysis in. Here we give an update of the main results and refer the interested reader to for all the details.