Update on neural network parton distributions : NNPDF1.1

  title={Update on neural network parton distributions : NNPDF1.1},
  author={Nnpdf Collaboration Juan Rojo and Richard D. Ball and Luigi Del Debbio and Stefano Forte and Alberto Guffanti and Jos{\'e} Ignacio Latorre and Andrea Piccione and Maria Ubiali},
We present recent progress within the NNPDF parton analysis framework. After a brief review of the results from the DIS NNPDF analysis, NNPDF1.0, we discuss results from an updated analysis with independent parametrizations for the strange and anti-strange distributions, denoted by NNPDF1.1. We examine the phenomenological implications of this improved analysis for the strange PDFs. Introduction PDFs and their associated uncertainties will play a crucial role in the full exploitation of the LHC… 

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