VBF higgs production at NLO
Hi,
I have few questions related to VBF higgs production at NLO. I am generating this process in the following manner:
define j = j b
generate p p > h j j $$w+ w- z [QCD]
1. With default jet radius = 0.7, anti-kT algo., min jet pT = 20 GeV, maximum rapidity of jets = 5.0, the cross section seems to increase from LO value. However, in https:/
2. For NLO event generation with showering, does the Pythia interface in Madgraph automatically merges the parton showers with hard jet emissions? Or should I set ickkw=3? Please correct me if I am wrong in understanding that while in matrix element at NLO, there are born diagrams with 2 partons, virtual diagrams and real emissions with 3 partons. Now the infrared divergence of the virtual diagrams will be cancelled by soft part of real emission partons. So, does parton showering too takes care of this divergence cancellation? If yes, how?
3. So, as a result, I will have three partons in the matrix element at NLO, however I am to study higgs plus 2 jets via VBF at NLO. So, should I do the following then?
generate p p > h j j $$w+ w- z [QCD]
add process p p > h j j j $$w+ w- z [QCD]
and then match?
Your insights will be helpful to understand this matter.
Best regards,
Antara
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