madgraph+shower
Dear experts,
I want to study the parton shower effect on p p > z z h [QCD]. So I generate the events in the following. There are two options that I don't know how to set.
generate p p > z z h [QCD]
output pp-zzh-test
launch
/======
| 1. Type of perturbative computation order = NLO |
| 2. No MC@[N]LO matching / event generation fixed_order = OFF |
| 3. Shower the generated events shower = PYTHIA8 |
| 4. Decay onshell particles madspin = OFF |
| 5. Add weights to events for new hypp. reweight = OFF |
| 6. Run MadAnalysis5 on the events generated madanalysis = OFF |
\======
enter
Then, in the run_card.dat there is a ickkw option, and I don't know which one is suitable for my current study.
#******
# ickkw parameter: *
# 0: No merging *
# 3: FxFx Merging - WARNING! Applies merging only at the hard-event *
# level. After showering an MLM-type merging should be applied as *
# well. See http://
# 4: UNLOPS merging (with pythia8 only). No interface from within *
# MG5_aMC available, but available in Pythia8. *
# -1: NNLL+NLO jet-veto computation. See arxiv:1412.8408 [hep-ph]. *
#******
0 = ickkw
In the shower_card.dat, how to correctly set these two options.
# FxFx merging parameters !ONLY FOR PYTHIA8!
#******
Qcut = -1.0 # Merging scale
njmax = 0 # Maximal multiplicity in the merging
#******
Thanks!
Huanyu Bi
Question information
- Language:
- English Edit question
- Status:
- Answered
- Assignee:
- No assignee Edit question
- Last query:
- Last reply:
Can you help with this problem?
Provide an answer of your own, or ask HuanyuBi for more information if necessary.