Not able to run NLO process in models in Madgraph 3.4.2
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| MadGraph5_aMC@NLO |
New
|
Undecided
|
Kentarou Mawatari | ||
Bug Description
Dear all I am having problems to run the following instructions in MadGraph:
import model DMsimp_s_spin1
define p = g u c d s b u~ c~ d~ s~ b~
define j = g u c d s b u~ c~ d~ s~ b~
define l+ = e+ mu+
define l- = e- mu-
define vl = ve vm vt
define vl~ = ve~ vm~ vt~
generate p p > xd xd~ j [QCD]
After I get:
INFO: Checking for minimal orders which gives processes.
INFO: Please specify coupling orders to bypass this step.
INFO: Trying coupling order WEIGHTED<=5: WEIGTHED IS 2*DMV+QCD+2*QED
Setting the born squared orders automatically in the process definition to QED^2<=4 QCD^2<=2 DMV=0.
If this is not what you need, please regenerate with the correct orders.
-------
No Born diagrams found. Now switching to the loop-induced mode.
Please also cite ref. 'arXiv:1507.00020' when using results from this mode.
-------
Command "generate p p > xd xd~ j [QCD]" interrupted with error:
Exception :
Please report this bug on https:/
More information is found in 'MG5_debug'.
Please attach this file to your report.
The report says:
#******
#* MadGraph5_aMC@NLO *
#* *
#* * * *
#* * * * * *
#* * * * * 5 * * * * *
#* * * * * *
#* * * *
#* *
#* *
#* VERSION 3.4.2 2023-01-20 *
#* *
#* The MadGraph5_aMC@NLO Development Team - Find us at *
#* https:/
#* *
#******
#* *
#* Command File for MadGraph5_aMC@NLO *
#* *
#* run as ./bin/mg5_aMC filename *
#* *
#******
set group_subprocesses Auto
set ignore_
set low_mem_
set complex_mass_scheme False
set include_
set gauge unitary
set loop_optimized_
set loop_color_flows False
set max_npoint_
set default_
set max_t_for_channel 99
set zerowidth_tchannel True
set nlo_mixed_expansion True
import model sm
define p = g u c d s u~ c~ d~ s~
define j = g u c d s u~ c~ d~ s~
define l+ = e+ mu+
define l- = e- mu-
define vl = ve vm vt
define vl~ = ve~ vm~ vt~
import model DMsimp_s_spin1
define p = 21 2 4 1 3 -2 -4 -1 -3 5 -5 # pass to 5 flavors
define j = p
generate p p > xd xd~ j [QCD]
Traceback (most recent call last):
File "/lstore/
super(
File "/lstore/
self.
File "/lstore/
diagram_
File "/lstore/
process_
madgraph.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/lstore/
return self.cmd.
File "/lstore/
fksproc =fks_base.
File "/lstore/
" For this, use the 'virt=' mode, without multiparticle labels.")
madgraph.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/lstore/
return self.onecmd_
File "/lstore/
return func(arg, **opt)
File "/lstore/
return self.cmd.
File "/lstore/
self.do_add(" ".join(args))
File "/lstore/
return self.cmd.
File "/lstore/
raise Exception
Exception
default_
ignore_
include_
loop_
low_mem_
max_
automatic_
acknowledged
cluster_
mg5amc_
Any guesses why this is happening?
Best,
Esteban Chalbaud
| Olivier Mattelaer (olivier-mattelaer) wrote Re: [Bug 2011588] [NEW] Not able to run NLO process in models in Madgraph 3.4.2 | #1 |
| Esteban Chalbaud (echalbau) wrote | #2 |
| Olivier Mattelaer (olivier-mattelaer) wrote Re: [Bug 2011588] Not able to run NLO process in models in Madgraph 3.4.2 | #3 |
| Esteban Chalbaud (echalbau) wrote | #4 |
| Changed in mg5amcnlo: | |
| assignee: | nobody → Kentarou Mawatari (kentarou-mawatari) |
So the issue is the default definition of the order that MG5aMC is taking as default.
This force the loop induced mode (that you likely do not want)
and then MG5aMC detects an inconsistency.
So the solution is likely to specify what you want.
My guess is that you want to do is:
> generate p p > xd xd~ j DMV<=2 [QCD]
(but obviously I can be wrong)
Cheers,
Olivier
> On 14 Mar 2023, at 15:17, Esteban Chalbaud <email address hidden> wrote:
>
> Public bug reported:
>
> Dear all I am having problems to run the following instructions in MadGraph:
> import model DMsimp_s_spin1
> define p = g u c d s b u~ c~ d~ s~ b~
> define j = g u c d s b u~ c~ d~ s~ b~
> define l+ = e+ mu+
> define l- = e- mu-
> define vl = ve vm vt
> define vl~ = ve~ vm~ vt~
> generate p p > xd xd~ j [QCD]
>
> After I get:
>
> INFO: Checking for minimal orders which gives processes.
> INFO: Please specify coupling orders to bypass this step.
> INFO: Trying coupling order WEIGHTED<=5: WEIGTHED IS 2*DMV+QCD+2*QED
> Setting the born squared orders automatically in the process definition to QED^2<=4 QCD^2<=2 DMV=0.
> If this is not what you need, please regenerate with the correct orders.
> -------
> No Born diagrams found. Now switching to the loop-induced mode.
> Please also cite ref. 'arXiv:1507.00020' when using results from this mode.
> -------
> Command "generate p p > xd xd~ j [QCD]" interrupted with error:
> Exception :
> Please report this bug on https:/
> More information is found in 'MG5_debug'.
> Please attach this file to your report.
>
>
> The report says:
>
>
> #******
> #* MadGraph5_aMC@NLO *
> #* *
> #* * * *
> #* * * * * *
> #* * * * * 5 * * * * *
> #* * * * * *
> #* * * *
> #* *
> #* *
> #* VERSION 3.4.2 2023-01-20 *
> #* *
> #* The MadGraph5_aMC@NLO Development Team - Find us at *
> #* https:/
> #* *
> #******
> #* *
> #* Command File for MadGraph5_aMC@NLO *
> #* *
> #* run as ./bin/mg5_aMC filename *
> #* *
> #******
> set group_subprocesses Auto
> set...