MadGraph5_aMC@NLO

questions about run_card

Asked by karo

Hi,

    I worked on the wbf process pp>zjj,z> vv. I applied wbf cut in run_card, and it included PTj, mjj, eltaeta,etaj. I have confused about PTj.

     I applied PTj > 40. That should mean the minimum pt for all jets. Is it right ? If that's right, that cut should be the same as ptj1min>40, ptj2min>40 (the minimum pt for the first second jet in pt). But the cross sections in two cut ways are different, the error is 3%~4%.

   Another question, in my opinion, the auto_ptj_mjj just work when xqcut is non zero. It should not work if xqcut is zero. In my wbf process pp> zjj,z>vv, the results are different when auto_ptj_mjj turns on or turns off. I don't know what the auto_ptj_mjj should be for wbf process.

Thanks in advance
Karo

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

Did you set QCD=0 in order to have WBF?
if not then you do not have WBF...

Otherwise all difference should be seen in accordance with the statistical error associate. Could you provide the numbers?

> Another question, in my opinion, the auto_ptj_mjj just work when xqcut is non zero. It should not work if xqcut is zero. In my wbf process pp> zjj,z>vv, the results are different when auto_ptj_mjj turns on or turns off. I don't know what the auto_ptj_mjj should be for wbf process.

Do you have ickkw=1?

Cheers,

Olivier

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