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SUMMARY:Impact of PDFs at LO\, NLO and NNLO with correlated uncertainties 
 between orders using HERAFitter
DTSTART;VALUE=DATE-TIME:20140704T131500Z
DTEND;VALUE=DATE-TIME:20140704T133000Z
DTSTAMP;VALUE=DATE-TIME:20260306T122435Z
UID:indico-contribution-958@indico.ific.uv.es
DESCRIPTION:Speakers: Mandy Cooper-Sarkar (Oxford University)\nWe present 
 the HERAFitter project which provides a framework for Quantum\nChromodynam
 ics (QCD) analyses related to the proton structure in the\ncontext of mult
 i-processes and multi-experiments.\nBased on the concept of factorisable n
 ature of the cross sections into\nuniversal parton distribution functions 
 (PDFs) and process dependent\npartonic scattering cross sections\, HERAFit
 ter allows determination of\nPDFs from the various hard scattering measure
 ments.\nHere we report a set of parton distribution functions determined w
 ith\nthe HERAFitter program using HERA data and preserving correlations\nb
 etween uncertainties for the LO\, NLO and NNLO sets. The sets are used\nto
  study uncertainties for ratios of cross sections at LHC calculated at\ndi
 fferent order in QCD. A reduction of overall theoretical uncertainty\nis o
 bserved in this case.\n\nhttps://indico.ific.uv.es/event/2025/contribution
 s/958/
LOCATION: Sala 3+4
URL:https://indico.ific.uv.es/event/2025/contributions/958/
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