Abstract
Parton Distribution Functions (PDFs) are a crucial input at the LHC, their
uncertainty often being the limiting factor in the accuracy of theoretical
predictions. At the same time the LHC is providing us with a number of
precise measurements that help in constraining PDFs.
In the first part of this talk a brief overview on the state of the art of
PDF determination is given. In the second part, I will present NNPDF3.0, a
new global PDF determination including HERA-II deep-inelastic
cross-sections, jet production from ATLAS and CMS, vector boson rapidity and
transverse momentum distributions from ATLAS, CMS and LHCb, W + c data from
CMS and top quark total cross sections from ATLAS and CMS. The impact of
each new measurement is assessed. Results are based on LO, NLO and NNLO QCD
theory and also include electroweak corrections. Phenomenological
implications for the upcoming 13 TeV Run of the LHC, in particular for Higgs
production cross-sections are explored.