Theory

Short to Medium-term goals

• Missing Higher Order Corrections Uncertainties (MHOU)
  • Implementation of scale variation at NLO
  • Determination of the contribution to the covariance matrix due to MHOU estimated with scale variation
  • Fit with the MHOU uncertainty included in  the covariance matrix
  • Fit with scale variation in the theory
  • Comparison of:
    • NNLO-NLO shift
    • shift due to scale variation in the fit
    • increase of PDF uncertainties due to MHOU included in covariance matrix
• Nuclear & deuterium corrections:
  • Fit with one ore more models
  • Implementation in the covariance matrix as for MHOU
  • Fit with extra nuclear uncertainty
• Full computation for all processes in fit of NLO EW and PI
• Inclusion in the covariance matrix of further uncertainties in the NNLO QCD computation:
  • N3LO terms due to the use of K-factors
  • Uncertainties on NNLO corrections due to numerical instabilities, estimated by refitting

 

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Medium to Long-term goals

• Implementation of scale variation at NNLO
• Alternative ways of estimating MHOU, including constrained partial dataset fitting
• Approximate N3LO PDFs