Error detected for pp>N02 N02, N02>N01 h02, h02>b b~ j

Asked by Alexander Titterton

Hi,

I'm trying to simulate Next to Lightest Supersymm. Particle --> Lightest Supersymm. Particle + Higgs (Any Higgs in NMSSM), then Higgs --> b bbar, including the cases with b b~ + hard jets.

Without jets, i.e. end stage b b~, I get no errors at all. However, when I calculate the processes ending in b b~ j, b b~ jj etc, I get a bunch of errors which don't make much sense to me!

Here's the error at the end of the run, when it crashes (pre-pythia):
Error when reading /home/ast1g15/MG5_aMC/MG5_aMC_v2_3_3/MyScript1/SubProcesses/P2_qq_n2n2_n2_n1h02_h02_bbxg_n2_n1h02_h02_bbxg/G9a0/results.dat
Command "generate_events run_01" interrupted with error:
ValueError : could not convert string to float:
Please report this bug on https://bugs.launchpad.net/madgraph5
More information is found in '/home/ast1g15/MG5_aMC/MG5_aMC_v2_3_3/MyScript1/run_01_tag_1_debug.log'.
Please attach this file to your report.

Additionally I get "ERROR DETECTED:" in-between the INFO: Idle (number), Running: (number), Completed: (number) [time elapsed] messages...

The commands I'm running are:
import model nmssm -modelname #Keeping the particle names as they are
define h = h01 h02 h03 a01 a02 #So that it considers all higgs in NMSSM
generate p p > n2 n2, (n2 > n1 h, h > b b~) #running with just this process causes no errors
add process p p > n2 n2, (n2 > n1 h, h > b b~ j) #running with this (or only generating this) process causes the above errors
output MyScript1
launch MyScript1
pythia=ON
delphes=ON
/home/ast1g15/Ellwanger_4spectr.dat #From NMSSMTools, this is read correctly as the param_card.dat
/home/ast1g15/delphes_card_CMS.tcl #CMS Delphes card, read correctly as delphes_card.dat
set nevents=10000

I'm really not sure what is causing the errors, since the only difference is a hard jet which seems strange to be throwing a string-float conversion error...

Cheers,
Alex

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Olivier Mattelaer (olivier-mattelaer) said :
#1

Dear Alexander,

1) We do not have any module handling the matching/merging for decayed particle.
Therefore such computation has some double counting since the parton-shower also radiates jets from the bb~ pair.
Using the standard matching/merging of MadGraph will not work in that case

2) Which kind of cut did you put on the jet? and did you check that cut_decays=T?

3) you can look at the log file present in the /home/ast1g15/MG5_aMC/MG5_aMC_v2_3_3/MyScript1/SubProcesses/P2_qq_n2n2_n2_n1h02_h02_bbxg_n2_n1h02_h02_bbxg/G9a0/
directory to see what the problem is.

Cheers,

Olivier

> On Dec 9, 2015, at 17:02, Alexander Titterton <email address hidden> wrote:
>
> New question #277330 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/277330
>
> Hi,
>
> I'm trying to simulate Next to Lightest Supersymm. Particle --> Lightest Supersymm. Particle + Higgs (Any Higgs in NMSSM), then Higgs --> b bbar, including the cases with b b~ + hard jets.
>
> Without jets, i.e. end stage b b~, I get no errors at all. However, when I calculate the processes ending in b b~ j, b b~ jj etc, I get a bunch of errors which don't make much sense to me!
>
> Here's the error at the end of the run, when it crashes (pre-pythia):
> Error when reading /home/ast1g15/MG5_aMC/MG5_aMC_v2_3_3/MyScript1/SubProcesses/P2_qq_n2n2_n2_n1h02_h02_bbxg_n2_n1h02_h02_bbxg/G9a0/results.dat
> Command "generate_events run_01" interrupted with error:
> ValueError : could not convert string to float:
> Please report this bug on https://bugs.launchpad.net/madgraph5
> More information is found in '/home/ast1g15/MG5_aMC/MG5_aMC_v2_3_3/MyScript1/run_01_tag_1_debug.log'.
> Please attach this file to your report.
>
>
> Additionally I get "ERROR DETECTED:" in-between the INFO: Idle (number), Running: (number), Completed: (number) [time elapsed] messages...
>
> The commands I'm running are:
> import model nmssm -modelname #Keeping the particle names as they are
> define h = h01 h02 h03 a01 a02 #So that it considers all higgs in NMSSM
> generate p p > n2 n2, (n2 > n1 h, h > b b~) #running with just this process causes no errors
> add process p p > n2 n2, (n2 > n1 h, h > b b~ j) #running with this (or only generating this) process causes the above errors
> output MyScript1
> launch MyScript1
> pythia=ON
> delphes=ON
> /home/ast1g15/Ellwanger_4spectr.dat #From NMSSMTools, this is read correctly as the param_card.dat
> /home/ast1g15/delphes_card_CMS.tcl #CMS Delphes card, read correctly as delphes_card.dat
> set nevents=10000
>
>
> I'm really not sure what is causing the errors, since the only difference is a hard jet which seems strange to be throwing a string-float conversion error...
>
>
> Cheers,
> Alex
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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#2

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