Failure in single top event generation

Asked by HH on 2020-05-18

Dear experts

I need to generate (s-, t-channel and tw) single top events. I use the following syntax:

import model sm-no_b_mass
define bb = b b~
define tt = t t~
define ww = w+ w-
generate p p > tt j
add process p p > tt bb j
add process p p > tt ww
output singleTop13

However, after a while I encounter this error:

Command "import command ../event.txt" interrupted in sub-command:
"multi_run 20" with error:
Exception : program /home/hh/MyFiles/sw/MG5_aMC_v2_6_6-0-singleTop13/singleTop13/Events/run_01_0/PY8_parallelization/run_PY8.sh 5 launch ends with non zero status: 139. Stop all computation

Would you please let me know how I can handle this problem ? and is the syntax totally right?

Below you can see the log file content:

#************************************************************
#* MadGraph5_aMC@NLO/MadEvent *
#* *
#* * * *
#* * * * * *
#* * * * * 5 * * * * *
#* * * * * *
#* * * *
#* *
#* *
#* VERSION 2.6.6 20xx-xx-xx *
#* *
#* The MadGraph5_aMC@NLO Development Team - Find us at *
#* https://server06.fynu.ucl.ac.be/projects/madgraph *
#* *
#************************************************************
#* *
#* Command File for MadEvent *
#* *
#* run as ./bin/madevent.py filename *
#* *
#************************************************************
multi_run 20
Traceback (most recent call last):
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1514, in onecmd
    return self.onecmd_orig(line, **opt)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1463, in onecmd_orig
    return func(arg, **opt)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1154, in do_import
    self.import_command_file(args[1])
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1660, in import_command_file
    self.exec_cmd(line, precmd=True)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1543, in exec_cmd
    stop = Cmd.onecmd_orig(current_interface, line, **opt)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1463, in onecmd_orig
    return func(arg, **opt)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/madevent_interface.py", line 2963, in do_multi_run
    self.exec_cmd('generate_events %s_%s -f' % (main_name, i), postcmd=False)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1543, in exec_cmd
    stop = Cmd.onecmd_orig(current_interface, line, **opt)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1463, in onecmd_orig
    return func(arg, **opt)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/madevent_interface.py", line 2469, in do_generate_events
    self.run_generate_events(switch_mode, args)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/common_run_interface.py", line 6929, in new_fct
    original_fct(obj, *args, **opts)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/madevent_interface.py", line 2577, in run_generate_events
    self.exec_cmd('shower --no_default', postcmd=False, printcmd=False)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1543, in exec_cmd
    stop = Cmd.onecmd_orig(current_interface, line, **opt)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1463, in onecmd_orig
    return func(arg, **opt)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/madevent_interface.py", line 3852, in do_shower
    postcmd=False, printcmd=False)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1543, in exec_cmd
    stop = Cmd.onecmd_orig(current_interface, line, **opt)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/extended_cmd.py", line 1463, in onecmd_orig
    return func(arg, **opt)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/madevent_interface.py", line 4520, in do_pythia8
    self.cluster.wait(parallelization_dir,wait_monitoring)
  File "/home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/bin/internal/cluster.py", line 822, in wait
    raise Exception, self.fail_msg
Exception: program /home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/singleTop13/Events/run_01_0/PY8_parallelization/run_PY8.sh 8 launch ends with non zero status: 139. Stop all computation
                              Run Options
                              -----------
               stdout_level : None

                         MadEvent Options
                         ----------------
     automatic_html_opening : False (user set)
        notification_center : True
          cluster_temp_path : None
             cluster_memory : None
               cluster_size : 100
              cluster_queue : None
                    nb_core : 12 (user set)
               cluster_time : None
                   run_mode : 2

                      Configuration Options
                      ---------------------
                text_editor : None
         cluster_local_path : None
      cluster_status_update : (600, 30)
               pythia8_path : /home/hh/MyFiles/sw/MG5_aMC_v2_6_6/HEPTools/pythia8 (user set)
                  hwpp_path : None (user set)
            pythia-pgs_path : None (user set)
                    td_path : None (user set)
               delphes_path : /home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/Delphes (user set)
                thepeg_path : None (user set)
               cluster_type : condor
          madanalysis5_path : None (user set)
           cluster_nb_retry : 1
                 eps_viewer : None
                web_browser : None
               syscalc_path : None (user set)
           madanalysis_path : None (user set)
                     lhapdf : /home/hh/MyFiles/sw/MG5_aMC_v2_6_6/HEPTools/lhapdf6/bin/lhapdf-config (user set)
              f2py_compiler : None
                 hepmc_path : /home/hh/MyFiles/sw/MG5_aMC_v2_6_6/HEPTools/hepmc (user set)
         cluster_retry_wait : 300
           fortran_compiler : None
                auto_update : 0 (user set)
        exrootanalysis_path : /home/hh/MyFiles/sw/MG5_aMC_v2_6_6-1-singleTop13/ExRootAnalysis (user set)
                    timeout : 60
               cpp_compiler : None
#************************************************************
#* MadGraph5_aMC@NLO *
#* *
#* * * *
#* * * * * *
#* * * * * 5 * * * * *
#* * * * * *
#* * * *
#* *
#* *
#* VERSION 2.6.6 2018-06-28 *
#* *
#* The MadGraph5_aMC@NLO Development Team - Find us at *
#* https://server06.fynu.ucl.ac.be/projects/madgraph *
#* *
#************************************************************
#* *
#* Command File for MadGraph5_aMC@NLO *
#* *
#* run as ./bin/mg5_aMC filename *
#* *
#************************************************************
set default_unset_couplings 99
set group_subprocesses Auto
set ignore_six_quark_processes False
set loop_optimized_output True
set loop_color_flows False
set gauge unitary
set complex_mass_scheme False
set max_npoint_for_channel 0
import model sm-no_b_mass
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~
define p = 21 2 4 1 3 -2 -4 -1 -3 5 -5 # pass to 5 flavors
define j = p
define bb = b b~
define tt = t t~
define ww = w+ w-
generate p p > tt j
add process p p > tt bb j
add process p p > tt ww
output singleTop13
######################################################################
## PARAM_CARD AUTOMATICALY GENERATED BY MG5 FOLLOWING UFO MODEL ####
######################################################################
## ##
## Width set on Auto will be computed following the information ##
## present in the decay.py files of the model. ##
## See arXiv:1402.1178 for more details. ##
## ##
######################################################################

###################################
## INFORMATION FOR MASS
###################################
Block mass
    6 1.730000e+02 # MT
   15 1.777000e+00 # MTA
   23 9.118800e+01 # MZ
   25 1.250000e+02 # MH
## Dependent parameters, given by model restrictions.
## Those values should be edited following the
## analytical expression. MG5 ignores those values
## but they are important for interfacing the output of MG5
## to external program such as Pythia.
  1 0.000000e+00 # d : 0.0
  2 0.000000e+00 # u : 0.0
  3 0.000000e+00 # s : 0.0
  4 0.000000e+00 # c : 0.0
  5 0.000000e+00 # b : 0.0
  11 0.000000e+00 # e- : 0.0
  12 0.000000e+00 # ve : 0.0
  13 0.000000e+00 # mu- : 0.0
  14 0.000000e+00 # vm : 0.0
  16 0.000000e+00 # vt : 0.0
  21 0.000000e+00 # g : 0.0
  22 0.000000e+00 # a : 0.0
  24 8.041900e+01 # w+ : cmath.sqrt(MZ__exp__2/2. + cmath.sqrt(MZ__exp__4/4. - (aEW*cmath.pi*MZ__exp__2)/(Gf*sqrt__2)))

###################################
## INFORMATION FOR SMINPUTS
###################################
Block sminputs
    1 1.325070e+02 # aEWM1
    2 1.166390e-05 # Gf
    3 1.180000e-01 # aS

###################################
## INFORMATION FOR YUKAWA
###################################
Block yukawa
    6 1.730000e+02 # ymt
   15 1.777000e+00 # ymtau

###################################
## INFORMATION FOR DECAY
###################################
DECAY 6 1.491500e+00 # WT
DECAY 23 2.441404e+00 # WZ
DECAY 24 2.047600e+00 # WW
DECAY 25 6.382339e-03 # WH
## Dependent parameters, given by model restrictions.
## Those values should be edited following the
## analytical expression. MG5 ignores those values
## but they are important for interfacing the output of MG5
## to external program such as Pythia.
DECAY 1 0.000000e+00 # d : 0.0
DECAY 2 0.000000e+00 # u : 0.0
DECAY 3 0.000000e+00 # s : 0.0
DECAY 4 0.000000e+00 # c : 0.0
DECAY 5 0.000000e+00 # b : 0.0
DECAY 11 0.000000e+00 # e- : 0.0
DECAY 12 0.000000e+00 # ve : 0.0
DECAY 13 0.000000e+00 # mu- : 0.0
DECAY 14 0.000000e+00 # vm : 0.0
DECAY 15 0.000000e+00 # ta- : 0.0
DECAY 16 0.000000e+00 # vt : 0.0
DECAY 21 0.000000e+00 # g : 0.0
DECAY 22 0.000000e+00 # a : 0.0
#*********************************************************************
# MadGraph5_aMC@NLO *
# *
# run_card.dat MadEvent *
# *
# This file is used to set the parameters of the run. *
# *
# Some notation/conventions: *
# *
# Lines starting with a '# ' are info or comments *
# *
# mind the format: value = variable ! comment *
# *
# To display more options, you can type the command: *
# update full_run_card *
#*********************************************************************
#
#*******************
# Running parameters
#*******************
#
#*********************************************************************
# Tag name for the run (one word) *
#*********************************************************************
  tag_1 = run_tag ! name of the run
#*********************************************************************
# Number of events and rnd seed *
# Warning: Do not generate more than 1M events in a single run *
#*********************************************************************
  50000 = nevents ! Number of unweighted events requested
  0 = iseed ! rnd seed (0=assigned automatically=default))
#*********************************************************************
# Collider type and energy *
# lpp: 0=No PDF, 1=proton, -1=antiproton, 2=photon from proton, *
# 3=photon from electron *
#*********************************************************************
  1 = lpp1 ! beam 1 type
  1 = lpp2 ! beam 2 type
  6500.0 = ebeam1 ! beam 1 total energy in GeV
  6500.0 = ebeam2 ! beam 2 total energy in GeV
# To see polarised beam options: type "update beam_pol"
#*********************************************************************
# PDF CHOICE: this automatically fixes also alpha_s and its evol. *
#*********************************************************************
  nn23lo1 = pdlabel ! PDF set
  230000 = lhaid ! if pdlabel=lhapdf, this is the lhapdf number
# To see heavy ion options: type "update ion_pdf"
#*********************************************************************
# Renormalization and factorization scales *
#*********************************************************************
  False = fixed_ren_scale ! if .true. use fixed ren scale
  False = fixed_fac_scale ! if .true. use fixed fac scale
  91.188 = scale ! fixed ren scale
  91.188 = dsqrt_q2fact1 ! fixed fact scale for pdf1
  91.188 = dsqrt_q2fact2 ! fixed fact scale for pdf2
  -1 = dynamical_scale_choice ! Choose one of the preselected dynamical choices
  1.0 = scalefact ! scale factor for event-by-event scales
#*********************************************************************
# Type and output format
#*********************************************************************
  False = gridpack !True = setting up the grid pack
  -1.0 = time_of_flight ! threshold (in mm) below which the invariant livetime is not written (-1 means not written)
  3.0 = lhe_version ! Change the way clustering information pass to shower.
  True = clusinfo ! include clustering tag in output
  average = event_norm ! average/sum. Normalization of the weight in the LHEF

#*********************************************************************
# Matching parameter (MLM only)
#*********************************************************************
  1 = ickkw ! 0 no matching, 1 MLM
  1.0 = alpsfact ! scale factor for QCD emission vx
  False = chcluster ! cluster only according to channel diag
  5 = asrwgtflavor ! highest quark flavor for a_s reweight
  False = auto_ptj_mjj ! Automatic setting of ptj and mjj if xqcut >0
                                   ! (turn off for VBF and single top processes)
  30.0 = xqcut ! minimum kt jet measure between partons
#*********************************************************************
#
#*********************************************************************
# handling of the helicities:
# 0: sum over all helicities
# 1: importance sampling over helicities
#*********************************************************************
  0 = nhel ! using helicities importance sampling or not.
#*********************************************************************
# Generation bias, check the wiki page below for more information: *
# 'cp3.irmp.ucl.ac.be/projects/madgraph/wiki/LOEventGenerationBias' *
#*********************************************************************
  None = bias_module ! Bias type of bias, [None, ptj_bias, -custom_folder-]
  {} = bias_parameters ! Specifies the parameters of the module.
#
#*******************************
# Parton level cuts definition *
#*******************************
#
#
#*********************************************************************
# BW cutoff (M+/-bwcutoff*Gamma) ! Define on/off-shell for "$" and decay
#*********************************************************************
  15.0 = bwcutoff ! (M+/-bwcutoff*Gamma)
#*********************************************************************
# Apply pt/E/eta/dr/mij/kt_durham cuts on decay products or not
# (note that etmiss/ptll/ptheavy/ht/sorted cuts always apply)
#*********************************************************************
  False = cut_decays ! Cut decay products
#*********************************************************************
# Standard Cuts *
#*********************************************************************
# Minimum and maximum pt's (for max, -1 means no cut) *
#*********************************************************************
  20.0 = ptj ! minimum pt for the jets
  0.0 = ptb ! minimum pt for the b
  10.0 = pta ! minimum pt for the photons
  10.0 = ptl ! minimum pt for the charged leptons
  0.0 = misset ! minimum missing Et (sum of neutrino's momenta)
  -1.0 = ptjmax ! maximum pt for the jets
  -1.0 = ptbmax ! maximum pt for the b
  -1.0 = ptamax ! maximum pt for the photons
  -1.0 = ptlmax ! maximum pt for the charged leptons
  -1.0 = missetmax ! maximum missing Et (sum of neutrino's momenta)
  {} = pt_min_pdg ! pt cut for other particles (use pdg code). Applied on particle and anti-particle
  {} = pt_max_pdg ! pt cut for other particles (syntax e.g. {6: 100, 25: 50})
#
# For display option for energy cut in the partonic center of mass frame type 'update ecut'
#
#*********************************************************************
# Maximum and minimum absolute rapidity (for max, -1 means no cut) *
#*********************************************************************
  5.0 = etaj ! max rap for the jets
  -1.0 = etab ! max rap for the b
  2.5 = etaa ! max rap for the photons
  2.5 = etal ! max rap for the charged leptons
  0.0 = etajmin ! min rap for the jets
  0.0 = etabmin ! min rap for the b
  0.0 = etaamin ! min rap for the photons
  0.0 = etalmin ! main rap for the charged leptons
  {} = eta_min_pdg ! rap cut for other particles (use pdg code). Applied on particle and anti-particle
  {} = eta_max_pdg ! rap cut for other particles (syntax e.g. {6: 2.5, 23: 5})
#*********************************************************************
# Minimum and maximum DeltaR distance *
#*********************************************************************
  0.0 = drjj ! min distance between jets
  0.0 = drbb ! min distance between b's
  0.4 = drll ! min distance between leptons
  0.4 = draa ! min distance between gammas
  0.0 = drbj ! min distance between b and jet
  0.4 = draj ! min distance between gamma and jet
  0.0 = drjl ! min distance between jet and lepton
  0.0 = drab ! min distance between gamma and b
  0.0 = drbl ! min distance between b and lepton
  0.4 = dral ! min distance between gamma and lepton
  -1.0 = drjjmax ! max distance between jets
  -1.0 = drbbmax ! max distance between b's
  -1.0 = drllmax ! max distance between leptons
  -1.0 = draamax ! max distance between gammas
  -1.0 = drbjmax ! max distance between b and jet
  -1.0 = drajmax ! max distance between gamma and jet
  -1.0 = drjlmax ! max distance between jet and lepton
  -1.0 = drabmax ! max distance between gamma and b
  -1.0 = drblmax ! max distance between b and lepton
  -1.0 = dralmax ! maxdistance between gamma and lepton
#*********************************************************************
# Minimum and maximum invariant mass for pairs *
# WARNING: for four lepton final state mmll cut require to have *
# different lepton masses for each flavor! *
#*********************************************************************
  0.0 = mmjj ! min invariant mass of a jet pair
  0.0 = mmbb ! min invariant mass of a b pair
  0.0 = mmaa ! min invariant mass of gamma gamma pair
  0.0 = mmll ! min invariant mass of l+l- (same flavour) lepton pair
  -1.0 = mmjjmax ! max invariant mass of a jet pair
  -1.0 = mmbbmax ! max invariant mass of a b pair
  -1.0 = mmaamax ! max invariant mass of gamma gamma pair
  -1.0 = mmllmax ! max invariant mass of l+l- (same flavour) lepton pair
  {} = mxx_min_pdg ! min invariant mass of a pair of particles X/X~ (e.g. {6:250})
  {'default': False} = mxx_only_part_antipart ! if True the invariant mass is applied only
                       ! to pairs of particle/antiparticle and not to pairs of the same pdg codes.
#*********************************************************************
# Minimum and maximum invariant mass for all letpons *
#*********************************************************************
  0.0 = mmnl ! min invariant mass for all letpons (l+- and vl)
  -1.0 = mmnlmax ! max invariant mass for all letpons (l+- and vl)
#*********************************************************************
# Minimum and maximum pt for 4-momenta sum of leptons *
#*********************************************************************
  0.0 = ptllmin ! Minimum pt for 4-momenta sum of leptons(l and vl)
  -1.0 = ptllmax ! Maximum pt for 4-momenta sum of leptons(l and vl)
#*********************************************************************
# Inclusive cuts *
#*********************************************************************
  0.0 = ptheavy ! minimum pt for at least one heavy final state
  0.0 = xptj ! minimum pt for at least one jet
  0.0 = xptb ! minimum pt for at least one b
  0.0 = xpta ! minimum pt for at least one photon
  0.0 = xptl ! minimum pt for at least one charged lepton
#*********************************************************************
# Control the pt's of the jets sorted by pt *
#*********************************************************************
  0.0 = ptj1min ! minimum pt for the leading jet in pt
  0.0 = ptj2min ! minimum pt for the second jet in pt
  0.0 = ptj3min ! minimum pt for the third jet in pt
  0.0 = ptj4min ! minimum pt for the fourth jet in pt
  -1.0 = ptj1max ! maximum pt for the leading jet in pt
  -1.0 = ptj2max ! maximum pt for the second jet in pt
  -1.0 = ptj3max ! maximum pt for the third jet in pt
  -1.0 = ptj4max ! maximum pt for the fourth jet in pt
  0 = cutuse ! reject event if fails any (0) / all (1) jet pt cuts
#*********************************************************************
# Control the pt's of leptons sorted by pt *
#*********************************************************************
  0.0 = ptl1min ! minimum pt for the leading lepton in pt
  0.0 = ptl2min ! minimum pt for the second lepton in pt
  0.0 = ptl3min ! minimum pt for the third lepton in pt
  0.0 = ptl4min ! minimum pt for the fourth lepton in pt
  -1.0 = ptl1max ! maximum pt for the leading lepton in pt
  -1.0 = ptl2max ! maximum pt for the second lepton in pt
  -1.0 = ptl3max ! maximum pt for the third lepton in pt
  -1.0 = ptl4max ! maximum pt for the fourth lepton in pt
#*********************************************************************
# Control the Ht(k)=Sum of k leading jets *
#*********************************************************************
  0.0 = htjmin ! minimum jet HT=Sum(jet pt)
  -1.0 = htjmax ! maximum jet HT=Sum(jet pt)
  0.0 = ihtmin !inclusive Ht for all partons (including b)
  -1.0 = ihtmax !inclusive Ht for all partons (including b)
  0.0 = ht2min ! minimum Ht for the two leading jets
  0.0 = ht3min ! minimum Ht for the three leading jets
  0.0 = ht4min ! minimum Ht for the four leading jets
  -1.0 = ht2max ! maximum Ht for the two leading jets
  -1.0 = ht3max ! maximum Ht for the three leading jets
  -1.0 = ht4max ! maximum Ht for the four leading jets
#***********************************************************************
# Photon-isolation cuts, according to hep-ph/9801442 *
# When ptgmin=0, all the other parameters are ignored *
# When ptgmin>0, pta and draj are not going to be used *
#***********************************************************************
  0.0 = ptgmin ! Min photon transverse momentum
  0.4 = r0gamma ! Radius of isolation code
  1.0 = xn ! n parameter of eq.(3.4) in hep-ph/9801442
  1.0 = epsgamma ! epsilon_gamma parameter of eq.(3.4) in hep-ph/9801442
  True = isoem ! isolate photons from EM energy (photons and leptons)
#*********************************************************************
# WBF cuts *
#*********************************************************************
  0.0 = xetamin ! minimum rapidity for two jets in the WBF case
  0.0 = deltaeta ! minimum rapidity for two jets in the WBF case
#***********************************************************************
# Turn on either the ktdurham or ptlund cut to activate *
# CKKW(L) merging with Pythia8 [arXiv:1410.3012, arXiv:1109.4829] *
#***********************************************************************
  -1.0 = ktdurham
  0.4 = dparameter
  -1.0 = ptlund
  1, 2, 3, 4, 5, 6, 21 = pdgs_for_merging_cut ! PDGs for two cuts above
#*********************************************************************
# maximal pdg code for quark to be considered as a light jet *
# (otherwise b cuts are applied) *
#*********************************************************************
  5 = maxjetflavor ! Maximum jet pdg code
#*********************************************************************
#
#*********************************************************************
# Store info for systematics studies *
# WARNING: Do not use for interference type of computation *
#*********************************************************************
  True = use_syst ! Enable systematics studies
#
  systematics = systematics_program ! none, systematics [python], SysCalc [depreceted, C++]
['--mur=0.5,1,2', '--muf=0.5,1,2', '--pdf=errorset'] = systematics_arguments ! see: https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/Systematics#Systematicspythonmodule
# Syscalc is deprecated but to see the associate options type'update syscalc'#*********************************************************************
# Additional hidden parameters
#*********************************************************************
  ['--mur=0.5,1,2', '--muf=0.5,1,2', '--pdf=errorset'] = systematics_arguments # Choose the argment to pass to the systematics command. like --mur=0.25,1,4. Look at the help of the systematics function for more details.

Question information

Language:
English Edit question
Status:
Solved
For:
MadGraph5_aMC@NLO Edit question
Assignee:
No assignee Edit question
Solved by:
Olivier Mattelaer
Solved:
2020-07-11
Last query:
2020-07-11
Last reply:
2020-05-20

Hi,

The crash is likely related to the fact that you are requesting some MLM merging and the PY8 is not able to find correctly the born process related to your MLM merging.

The issue is that you do have some double counting between
generate p p > tt j
and
add process p p > tt bb j
Which forces to activate the MLM mode.

However in that case you can not add the
add process p p > tt ww
since this is not QCD related to
generate p p > tt j
and this is why Py8 is crashing.

Cheers,

Olivier

> On 18 May 2020, at 09:25, HH <email address hidden> wrote:
>
> New question #690793 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/690793
>
> Dear experts
>
> I need to generate (s-, t-channel and tw) single top events. I use the following syntax:
>
> import model sm-no_b_mass
> define bb = b b~
> define tt = t t~
> define ww = w+ w-
> generate p p > tt j
> add process p p > tt bb j
> add process p p > tt ww
> output singleTop13
>
> However, after a while I encounter this error:
>
> Command "import command ../event.txt" interrupted in sub-command:
> "multi_run 20" with error:
> Exception : program /home/hh/MyFiles/sw/MG5_aMC_v2_6_6-0-singleTop13/singleTop13/Events/run_01_0/PY8_parallelization/run_PY8.sh 5 launch ends with non zero status: 139. Stop all computation
>
> Would you please let me know how I can handle this problem ? and is the syntax totally right?
>
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

HH (hh-madgrapher) said : #2

Hi

Thanks a lot for your response. So I will try generating the pp > tt ww events separately from pp > tt j and tt bb j.

Cheers

HH (hh-madgrapher) said : #3

Dear Olivier,

I removed "add process p p > tt ww" from the lines so that the s- and t-channel events are generated separately. However, again I encountered the same error and the computation stopped. Below you can see the used syntax:

import model sm-no_b_mass
define bb = b b~
define tt = t t~
generate p p > tt j
add process p p > tt bb j
output singleTop13

Any clarification will be appreciated. Is there any way to resolve this problem ?

Hi,

I guess the issue is still the same You have some issue with the double counting.
Do you really want to do some matching/merging?
It would be simpler to avoid those issues and simply do
generate p p > tt j
add process p p > tt ww

Cheers,

Olivier

> On 19 May 2020, at 12:41, HH <email address hidden> wrote:
>
> Question #690793 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/690793
>
> Status: Answered => Open
>
> HH is still having a problem:
> Dear Olivier,
>
> I removed "add process p p > tt ww" from the lines so that the s- and
> t-channel events are generated separately. However, again I encountered
> the same error and the computation stopped. Below you can see the used
> syntax:
>
> import model sm-no_b_mass
> define bb = b b~
> define tt = t t~
> generate p p > tt j
> add process p p > tt bb j
> output singleTop13
>
> Any clarification will be appreciated. Is there any way to resolve this
> problem ?
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

HH (hh-madgrapher) said : #5

Hi

Thanks for your reply. Actually, I need to simulate all single top channels including s-channel, t-channel and tw associated. Using

generate p p > tt j
add process p p > tt ww

some t-channel processes will be lost. Right? There is no way to generate a complete set of single top events including all channels?

Hi,

I'm not expert on single top. Is this not the diagram for single top?
https://www.researchgate.net/figure/Feynman-diagrams-for-single-top-quark-production-in-hadron-collisions-a-t-channel_fig6_1994797

if yes the correct syntax should be something like
define q = p / g b b~
generate q b > t q
add process q q > t b~
add process g b > t ww

I do not see the diagram corresponding to
add process p p > tt bb j

Cheers,

Olivier

HH (hh-madgrapher) said : #7

Hi,

The diagrams shown there are representative diagrams contributing to the single top process, however there are other processes contributing to the single top like the one with "t j b~" in final state. The complete set of single top events is achievable using the syntax
generate p p > tt j
add process p p > tt bb j
add process p p > tt ww
,However, an error prevents the generation.

The syntax
generate p p > tt j
add process p p > tt ww
only generates a portion of events not all of them. It leads to a cross section of 240 pb while the cross section of the full single top process is ~300 pb.

BTW, thanks a lot for your reply.

Hi,

add process p p > tt bb j

probably contains the diagrams that you want but also a diagrams that you do not want (due to the double counting).
You have to be more specific in your syntax here (or if you want me to help you show me the diagram that you want to keep)

For example if you just ask for
g s > t~ b c
you will get 4 diagrams.
diagrams 3 and 4 are clearly part of the one jet contribution of p p > t~ j (and therefore has double counting with that process)
I guess you want to keep diagram 2, but I'm not sure about diagrams 1.

Cheers,

Olivier

HH (hh-madgrapher) said : #9

Thanks Olivier Mattelaer, that solved my question.