MadGraph5_aMC@NLO

Syscalc use

Asked by Juhi Dutta

Hi,

I wanted to know when do we need to use SysCalc ? I have so far not used it and was inquisitive about it .

Regards,

Juhi

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Olivier Mattelaer
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Best Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

Syscalc allows you to compute theoretical uncertainty very quickly (without having to re-run the full process with different value of the scale/pdf).

The easiest way to use SysCalc is to
1) install it via "install SysCalc"
2) run with the option use_syst=T in the run_card.dat

This options write in the lhe file, the information that SysCalc needs to compute the theoretical uncertainty.
and when syscalc is installed, it runs it on the filght as well.

Cheers,

Olivier

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Juhi Dutta (dutta-juhi91) said : 		#2

Thank you very much for the information.

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Juhi Dutta (dutta-juhi91) said : 		#3

Thanks Olivier Mattelaer, that solved my question.