MadGraph5_aMC@NLO

Problem running ttbbbb decaying hadronically

Asked by Gabriel Vian

I am running the ttbbbb process with tops decaying hadronically (t --> W b) and W --> jets, but when I run the entire setup with MadGraph, Pythia, and Delphes, my computer freezes, even with only 1000 events.

After some attempts, I tried using the following configurations (with only 1000 events):

set run_mode 2
set nb_core 8

This prevented the computer from freezing, but the simulation took more than a day to run and still hasn't finished. What can I do to resolve this issue?

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Gabriel Vian
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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

This is a super complex computation, so trying such computation on a laptop is pointless.
I'm actually even surprise that the computation compile on your laptop.
For such computation, I would say that you need a cluster where you can run much more than 8 job at the time and that even in such configuration it will likely take you more than a day for such type of computation.

Additionally, my suggestion here would be to not include the top decay (it can be handle by pythia) this will be a bit less accurate but this is a price to pay for running such kind of beast.

Cheers,

Olivier

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Gabriel Vian (gabriel-vian-24) said : 		#2

Okay, Thank you for the response!