QCD 4-jet generation in MG 4

Asked by jiaxu on 2012-03-26

I used MG 4 to generate 50000 QCD 4-jet events.

but there are just 15080 events generated:

Iteration 1 too large truncation 0.0694536886 47915
 Iteration 2 too large truncation 0.060278045 37108
 Iteration 3 too large truncation 0.0489434058 28961
 Iteration 4 too large truncation 0.0346107892 22684
 Iteration 5 too large truncation 0.0162034932 17654
 Iteration 6 too few events 0.000976177049 13798
 Iteration 7 too few events 0.00104908594 14570
 Iteration 8 too few events 0.00243860913 15381
 Iteration 9 too few events 0.00709736311 16035
 Iteration 10 too large truncation 0.0115235672 16833
 Iteration 11 too few events 0.000893652751 13015
 Iteration 12 too few events 0.000967647809 13842
 Iteration 13 too few events 0.00104057802 14489
 Iteration 14 too few events 0.00188745815 15297
 Iteration 15 too few events 0.00657376968 15985
 Iteration 16 too large truncation 0.011025806 16724
 Iteration 17 too few events 0.000885073058 13023
 Iteration 18 too few events 0.000959068116 13751
 Iteration 19 too few events 0.00103201978 14466
 Iteration 20 too few events 0.00133304699 15080
 Unable to get 50000 events. Writing 15080
 Unweighting selected 15080 events.

How can I fixed it and generated 50000 events?

Question information

Language:
English Edit question
Status:
Answered
For:
MadGraph5_aMC@NLO Edit question
Assignee:
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Last query:
2012-03-26
Last reply:
2012-03-26

Hi Jiaxu,

We didn't make anymore support for MG4.
I'd strongly suggest to use MG5 instead.

We have improve multi-jets in MG5, so this should be much faster and
more efficient than the old MG4.

Cheers,

Olivier

On 26-mars-12, at 13:55, jiaxu wrote:

> New question #191745 on MadGraph5:
> https://answers.launchpad.net/madgraph5/+question/191745
>
>
> I used MG 4 to generate 50000 QCD 4-jet events.
>
> but there are just 15080 events generated:
>
> Iteration 1 too large truncation 0.0694536886 47915
> Iteration 2 too large truncation 0.060278045 37108
> Iteration 3 too large truncation 0.0489434058 28961
> Iteration 4 too large truncation 0.0346107892 22684
> Iteration 5 too large truncation 0.0162034932 17654
> Iteration 6 too few events 0.000976177049 13798
> Iteration 7 too few events 0.00104908594 14570
> Iteration 8 too few events 0.00243860913 15381
> Iteration 9 too few events 0.00709736311 16035
> Iteration 10 too large truncation 0.0115235672 16833
> Iteration 11 too few events 0.000893652751 13015
> Iteration 12 too few events 0.000967647809 13842
> Iteration 13 too few events 0.00104057802 14489
> Iteration 14 too few events 0.00188745815 15297
> Iteration 15 too few events 0.00657376968 15985
> Iteration 16 too large truncation 0.011025806 16724
> Iteration 17 too few events 0.000885073058 13023
> Iteration 18 too few events 0.000959068116 13751
> Iteration 19 too few events 0.00103201978 14466
> Iteration 20 too few events 0.00133304699 15080
> Unable to get 50000 events. Writing 15080
> Unweighting selected 15080 events.
>
> How can I fixed it and generated 50000 events?
>
>
> --
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> MadTeam, which is an answer contact for MadGraph5.

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