Project Description

Look at MC multileg 0+1jet@LO description of ggZH process, compare nominal prediction vs simple LO MC. From QCD scale variations derive estimate of uncertainties for STXS VH bins and quantify the improvement from LO MC to 0+1jet@LO multileg MC.

Interested Participants

Carlo Pandini, Emanuele Re, Milene Calvetti, Valerio Dao, Enrico Bothmann, Paolo Francavilla

Preliminary Sherpa results

Here is a first proof-of-principle nominal prediction for 0+1jet@LO with Sherpa:

• Rivet Plots
• Config File

Points to consider

• check that e.g. powheg+py8 and mg5+py8 give the same, if the shower starting scale is the same
• 2 “substudies”: 1 targeted to just the STXS bins, one with some more differential distributions
• tools: powheg+py8 (current baseline for ATLAS/CMS), mg5+py8 (0 jet / 0+1 jet LO merging), sherpa (0 jet / 0+1 jet LO merging)
• for this study: H undecayed, Z decaying to 1 lepton family. Check that stxs rivet routine can do this (for py8 as well as sherpa).