MadGraph5_aMC@NLO

ME test failure for photon+jet process

Asked by Sihyun Jeon

Dear MadGraph team,

I am making "p p > a j [QCD]" with ptj = 10 and ptgmin = 570 cut.

One thing that I cannot fully understand is that I get an error like [1] which I do not understand as different values for pta (370 or 170) doesn't give back any error logs. What would be the cause for this error?

[1] INFO: Output of the failing test:
==== LHAPDF6 USING DEFAULT-TYPE LHAGLUE INTERFACE ====
LHAPDF 6.4.0 loading /cvmfs/cms.cern.ch/slc7_amd64_gcc10/external/lhapdf/6.4.0-68defff11ffd434c73727d03802bfb85/share/LHAPDF/NNPDF31_nnlo_as_0118_mc_hessian_pdfas/NNPDF31_nnlo_as_0118_mc_hessian_pdfas_0000.dat
NNPDF31_nnlo_as_0118_mc_hessian_pdfas PDF set, member #0, version 1; LHAPDF ID = 325300
 Enter 0 to compute MC/MC(limit)
       1 to compute MC/ME(limit)
       2 to compute ME/ME(limit)
 Enter xi_i, y_ij to be used in coll/soft tests
  Enter -2 to generate them randomly
 Enter number of tests for soft and collinear limits
 A PDF is used, so alpha_s(MZ) is going to be modified
 Old value of alpha_s from param_card: 0.11799999999999999
 New value of alpha_s from PDF lhapdf : 0.11800208008122040
 Give FKS configuration number ("0" loops over all)

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 1
 FKS partons are: i= 5 j= 1
 with PDGs: i= 21 j= 21

 Enter graph number (iconfig), '0' loops over all graphs
Using random seed offsets: 1 , 1 , 0
  with seed 32
 Ranmar initialization seeds 10730 9407
tau_min 1 1 : 0.00000E+00 -- 0.58000E+03
tau_min 2 1 : 0.00000E+00 -- 0.58000E+03
tau_min 3 1 : 0.58000E+03 0.58000E+03 0.58000E+03
tau_min 4 1 : 0.00000E+00 -- 0.58000E+03
tau_min 5 1 : 0.00000E+00 -- 0.58000E+03
tau_min 6 1 : 0.00000E+00 -- 0.58000E+03
tau_min 7 1 : 0.00000E+00 -- 0.58000E+03
tau_min 8 1 : 0.00000E+00 -- 0.58000E+03
tau_min 9 1 : 0.00000E+00 -- 0.58000E+03
tau_min 10 1 : 0.00000E+00 -- 0.58000E+03

 Soft tests done for (Born) config 1
 Failures: 100
     Soft test 1 FAILED. Fraction of failures: 1.00

 Collinear tests done for (Born) config 1
 Failures: 0
Collinear test 1 PASSED. Fraction of failures: 0.00

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 2
 FKS partons are: i= 5 j= 2
 with PDGs: i= 21 j= 2

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 100
     Soft test 2 FAILED. Fraction of failures: 1.00

 Collinear tests done for (Born) config 1
 Failures: 1
Collinear test 2 PASSED. Fraction of failures: 0.01

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 3
 FKS partons are: i= 5 j= 4
 with PDGs: i= 21 j= 2

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 0
     Soft test 3 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 0
Collinear test 3 PASSED. Fraction of failures: 0.00

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 4
 FKS partons are: i= 5 j= 1
 with PDGs: i= -1 j= -1

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 0
     Soft test 4 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 3
Collinear test 4 PASSED. Fraction of failures: 0.03

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 5
 FKS partons are: i= 5 j= 1
 with PDGs: i= 1 j= 1

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 0
     Soft test 5 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 1
Collinear test 5 PASSED. Fraction of failures: 0.01

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 6
 FKS partons are: i= 5 j= 1
Thanks for using LHAPDF 6.4.0. Please make sure to cite the paper:
  Eur.Phys.J. C75 (2015) 3, 132 (http://arxiv.org/abs/1412.7420)
 with PDGs: i= -2 j= -2

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 0
     Soft test 6 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 1
Collinear test 6 PASSED. Fraction of failures: 0.01

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 7
 FKS partons are: i= 5 j= 1
 with PDGs: i= 2 j= 2

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 0
     Soft test 7 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 3
Collinear test 7 PASSED. Fraction of failures: 0.03

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 8
 FKS partons are: i= 5 j= 1
 with PDGs: i= -4 j= -4

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 0
     Soft test 8 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 5
Collinear test 8 PASSED. Fraction of failures: 0.05

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 9
 FKS partons are: i= 5 j= 1
 with PDGs: i= 4 j= 4

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 0
     Soft test 9 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 3
Collinear test 9 PASSED. Fraction of failures: 0.03

 =================================================

 NEW FKS CONFIGURATION:
 FKS configuration number is 10
 FKS partons are: i= 5 j= 2
 with PDGs: i= -2 j= 21

 Enter graph number (iconfig), '0' loops over all graphs

 Soft tests done for (Born) config 1
 Failures: 0
     Soft test 10 PASSED. Fraction of failures: 0.00

 Collinear tests done for (Born) config 1
 Failures: 0
Collinear test 10 PASSED. Fraction of failures: 0.00

Question information

Language:
English Edit question
Status:
Solved
For:
MadGraph5_aMC@NLO Edit question
Assignee:
Rikkert Frederix Edit question
Solved by:
Sihyun Jeon
Solved:
Last query:
Last reply:
Revision history for this message
Sihyun Jeon (shjeon) said : 		#1

So it only fails for ptgmin between 520 to 670, away from this window it works

import model loop_sm-no_b_mass
generate p p > a j [QCD]
output
launch
0
set no_parton_cut
set ptj 10
set nevents 50
set ptgmin XXX
set r0gamma 0.15

I've altered XXX

Revision history for this message
Rikkert Frederix (frederix) said : 		#2

Thanks for the bug report. There is indeed a problem with the test when having photons with a relatively large minimal pT in the process. For now, the easiest way to get around the problem is to simply skip the tests. For this you run:

import model loop_sm-no_b_mass
generate p p > a j [QCD]
output
launch
0
set no_parton_cut
set ptj 10
set nevents 50
set ptgmin XXX
set r0gamma 0.15

as before. Let it crash, and then start the run with

launch -x -f

to skip the questions and the tests (it also skips part of the compilation, which is the reason that you still have to let it crash first so that all the parameters you set are correctly transferred to the fortran code.)

This will be fixed in the next release of the code.

best,
Rikkert

Revision history for this message
Sihyun Jeon (shjeon) said : 		#3

Hello Rikkert,

Is it possible to get the patch for this part if you have time to work on it? I can make a hack only for this particular case, but this will occur to any other random CMS samples and it's better to have a patch centrally configured.

Revision history for this message
Rikkert Frederix (frederix) said : 		#4

Hello Sihyun,

Sorry for the delay.

Probably the easiest to get this working is to replace the test_soft_col_limits.f file (in SubProcesses) using this one https://github.com/mg5amcnlo/mg5amcnlo/blob/3.5.2/Template/NLO/SubProcesses/test_soft_col_limits.f instead of the default. The important changes are around lines 190-216 or so. Depending on which version you are using now, some more adaptations might be needed.

Best,
Rikkert

Revision history for this message
Sihyun Jeon (shjeon) said : 		#5

Thanks Rikkert,

If this doesn't work out, I'll ping again!

Revision history for this message
Sihyun Jeon (shjeon) said : 		#6

Ah also this is a feature in mg29x as well so Olivier, I think this should be updated there as well if you don't mind

Revision history for this message
Sihyun Jeon (shjeon) said : 		#7

It seems to work well thanks

Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said : 		#8

For information I have include that fix in 2.9.18 (not yet release)