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Generation of TTZZ sample without MadSpin card #3815
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…customizecards.dat
Thanks. I think the tops need to be decayed in the Madgraph. (or madspin) |
Dear Bugra, I didn't request the top's decay, as my team wants this sample with the top decaying inclusive. |
Dear @G-Vian, in this case the decays will be handled by pythia8, which does not take into account spin correlations effects in the decays. This will lead to wrong distributions for spin sensitive observables. |
Tops decaying
Dear Lorenzo, |
Dear @G-Vian , thanks for following up and sorry for the late response. But actually, referring also to the other TTZZ card that you mentioned at the beginning, what is the difference here? It looks to me that in both cases you will get inclusive decays. |
Dear Lorenzo, |
Sorry, I'm not following. |
Yes, thats correct. |
Ok thanks, then I don't understand why you need these new TTZZ cards. |
It is because we dont want the MadSpin decay of the Zs |
But then why decay top in madgraph? Setup is not superbly convincing Either you drop all the decays in madgraph/madspin to enhance computing performance (pythia is faster) OR decay both t and z You decay top down to w and b. Why? Pythia decays top to w and b anyways You can do Or are we missing sth here |
I have decayed the Tops because was informed in the previous comment that leaving it to Pythia decay would lead to wrong spin correlations. |
Same story goes for z, it loses spin correlation when pythia handles it |
To me the proper configuration is the previous one, in which you use madspin for all the decays. Maybe if you explain why you don't want madspin we can have a better understanding. |
Dear GEN team,
My team wants a ttZZ sample with 13.6 TeV center of mass energy. The other TTZZ card, available at [1], contains a MadSpin Card that decays the ZZ, that's why I created these cards for a TTZZ process without Z decaying.
Thank you very much.