adding a FastJetFinder lead a wrong result.

[Li Huang]

Hi,

Last month I asked how to change the Jet algorithm and now I tried it , with the test.tcl, the original file is the delphes_card_ATLAS.tcl . I just add :

FastJetFinder1

and some related modular. You can find in test.tcl.

To my surprise is the Btag result is strange. Before changing, using delphes_card_ATLAS.tcl , the b jet is dominant and after ( I add a jet reconstruct algorithm and keep the old one ) , the old jet reconstruction give a very few b jet. You can see the picture. I use the same pythia file.

What's wrong with it ? Is my way add a jet reconstruction algorithm in the tcl file wrong?

Best,
Li