LHCb - Minimum Bias physics plans and MC framework - EPFL

(All) Inclusive measurements
Models used by Pythia and other generators were tuned mainly on
Tevatron data (LEP and SPS also used).
The agreement between models is broken at LHC, due to different
energy extrapolations. The models disagree even more in the LHCb
kinematical region, also η extrapolation.
Even basic distributions such as charged particle multiplicity can help
for the MC tuning, e.g. collection of minimum bias distributions of
interest: http://home.fnal.gov/ skands/leshouches-plots/qcdplots-houches.pdf.
The benchmark distributions variation range is constrained
−→ “New (QCD) physics” see Rick Field Introduction to UE and MB studies.
MCNet CERN R. Mures¸an, LHCb report – p.7/30