MadSpin, No such file or directory: full_me/Source/Model/ident_card.dat

Hi!

I am trying to generate events for Madgraph v 2.7.3 on lxplus, and run Madspin, Pythia8, and Delphes for the UFO model here: https://github.com/cartervu/GHH-Models/blob/master/SMwithHeavyScalarDim4Dim6_NoDecay_UFO.tar.gz

My goal is to scan several input parameters that impact heavy higgs coupling in this particular model. For my madspin decays, I have w+ > all all, w- > all all, z > all all.

I run into the following error during Madspin matrix element computation:

INFO: generating the full matrix element squared (with decay)
INFO: generate p p > hh > v v v, w- > all all QCD=99, z > all all QCD=99, w+ > all all QCD=99 --no_warning=duplicate;
Command "import command GHH600fFULL.txt" interrupted in sub-command:
"launch GHH_Parameter_Scan_01" with error:
IOError : [Errno 2] No such file or directory: '/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/full_me/Source/MODEL/ident_card.dat'
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in '/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/GHH_Parameter_Scan_01_tag_2_debug.log'.
Please attach this file to your report.
INFO: storing files of previous run
gzipping output file: unweighted_events.lhe
INFO: Done
INFO:
command not executed:
(list of commands not executed)

I have no idea why this might not work--I believe all of my input parameters are valid according to theory, and I have run this test for similar parameters before. Any advice would be much appreciated. More information about my setup and inputs are below.

Thank you for your help!

Best,
Carter Vu

For reference, I generate events via the following command: ./bin/mg5_aMC GHH_Generate

GHH_Generate:

import model SMwithHeavyScalarDim4Dim6_NoDecay_UFO
set nb_core 60
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+ ta+
define l- = e- mu- ta-
define v = z w- w+
generate p p > hh > v v v
output GHH_Parameter_Scan_01

I launch from madevent with the command ./bin/madevent GHH600fFULL.txt:

GHH600fFULL.txt:

set nb_core 50
launch GHH_Parameter_Scan_01
madspin=ON
shower=Pythia8
detector=Delphes
done
./Cards/madspin_card.dat
/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/Delphes/cards/delphes_card_ATLAS_HLVVV.tcl
set run_card nevents 20000
set param_card rhoh 5.000000e-02
set param_card lambda 5.000000e+03
set param_card fw 6.500000e+02
set param_card fww 0.000000e+00
set param_card fb 0.000000e+00
set param_card fbb 0.000000e+00
set param_card mhh 6.000000e+02
set param_card DECAY 254 AUTO
done

launch GHH_Parameter_Scan_01
./Cards/madspin_card.dat
/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/Delphes/cards/delphes_card_ATLAS_HLVVV.tcl
set param_card fw -6.500000e+02
set param_card fww 0.000000e+00
done

launch GHH_Parameter_Scan_01
/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/Delphes/cards/delphes_card_ATLAS_HLVVV.tcl
./Cards/madspin_card.dat
set param_card fw 4.000000e+02
set param_card fww 2.400000e+03
done

launch GHH_Parameter_Scan_01
./Cards/madspin_card.dat
/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/Delphes/cards/delphes_card_ATLAS_HLVVV.tcl
set param_card fw -4.000000e+02
set param_card fww 2.400000e+03
done

launch GHH_Parameter_Scan_01
./Cards/madspin_card.dat
/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/Delphes/cards/delphes_card_ATLAS_HLVVV.tcl
set param_card fw -4.000000e+02
set param_card fww -2.400000e+03
done

launch GHH_Parameter_Scan_01
/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/Delphes/cards/delphes_card_ATLAS_HLVVV.tcl
./Cards/madspin_card.dat
set param_card fw 4.000000e+02
set param_card fww -2.400000e+03
done

launch GHH_Parameter_Scan_01
/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/Delphes/cards/delphes_card_ATLAS_HLVVV.tcl
./Cards/madspin_card.dat
set param_card fw 0.000000e+00
set param_card fww 3.500000e+03
done

launch GHH_Parameter_Scan_01
/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/Delphes/cards/delphes_card_ATLAS_HLVVV.tcl
./Cards/madspin_card.dat
set param_card fw 0.000000e+00
set param_card fww -3.500000e+03
done

The log file is as follows:

#************************************************************
#* MadGraph5_aMC@NLO/MadEvent *
#* *
#* * * *
#* * * * * *
#* * * * * 5 * * * * *
#* * * * * *
#* * * *
#* *
#* *
#* VERSION 2.7.3 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 *
#* *
#************************************************************
set nb_core 50
launch GHH_Parameter_Scan_01
Traceback (most recent call last):
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/extended_cmd.py", line 1515, in onecmd
    return self.onecmd_orig(line, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/extended_cmd.py", line 1464, in onecmd_orig
    return func(arg, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/extended_cmd.py", line 1155, in do_import
    self.import_command_file(args[1])
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/extended_cmd.py", line 1661, in import_command_file
    self.exec_cmd(line, precmd=True)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/extended_cmd.py", line 1544, in exec_cmd
    stop = Cmd.onecmd_orig(current_interface, line, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/extended_cmd.py", line 1464, in onecmd_orig
    return func(arg, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/madevent_interface.py", line 2671, in do_launch
    self.do_generate_events(line, *args, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/madevent_interface.py", line 2468, in do_generate_events
    self.run_generate_events(switch_mode, args)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/common_run_interface.py", line 7011, in new_fct
    original_fct(obj, *args, **opts)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/madevent_interface.py", line 2567, in run_generate_events
    self.exec_cmd('decay_events -from_cards', postcmd=False)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/extended_cmd.py", line 1544, in exec_cmd
    stop = Cmd.onecmd_orig(current_interface, line, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/extended_cmd.py", line 1464, in onecmd_orig
    return func(arg, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/bin/internal/common_run_interface.py", line 3705, in do_decay_events
    madspin_cmd.import_command_file(path)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/interface/extended_cmd.py", line 1661, in import_command_file
    self.exec_cmd(line, precmd=True)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/interface/extended_cmd.py", line 1544, in exec_cmd
    stop = Cmd.onecmd_orig(current_interface, line, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/interface/extended_cmd.py", line 1464, in onecmd_orig
    return func(arg, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/various/misc.py", line 100, in f_with_no_logger
    out = f(self, *args, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/MadSpin/interface_madspin.py", line 634, in do_launch
    self.options)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/MadSpin/decay.py", line 2046, in __init__
    self.generate_all_matrix_element()
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/various/misc.py", line 100, in f_with_no_logger
    out = f(self, *args, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/various/misc.py", line 1934, in deco_f_set
    out = f(*args, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/MadSpin/decay.py", line 2761, in generate_all_matrix_element
    mgcmd.exec_cmd(commandline, precmd=True)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/interface/extended_cmd.py", line 1544, in exec_cmd
    stop = Cmd.onecmd_orig(current_interface, line, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/interface/extended_cmd.py", line 1464, in onecmd_orig
    return func(arg, **opt)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/interface/master_interface.py", line 298, in do_output
    self.cmd.do_output(self, line, *args, **opts)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/interface/madgraph_interface.py", line 7856, in do_output
    self.finalize(nojpeg, flaglist=flaglist)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/interface/madgraph_interface.py", line 8144, in finalize
    wanted_couplings)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/iolibs/export_v4.py", line 887, in convert_model
    model_builder.build(wanted_couplings)
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/iolibs/export_v4.py", line 5692, in build
    self.write_all()
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/iolibs/export_v4.py", line 5716, in write_all
    self.create_ident_card()
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/iolibs/export_v4.py", line 6831, in create_ident_card
    fsock = self.open('ident_card.dat')
  File "/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/madgraph/iolibs/export_v4.py", line 5704, in open
    fsock = open(file_path, 'w')
IOError: [Errno 2] No such file or directory: '/eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/full_me/Source/MODEL/ident_card.dat'
Related File: /eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/GHH_Parameter_Scan_01/full_me/Source/MODEL/ident_card.dat
                              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 : 50 (user set)
               cluster_time : None
                   run_mode : 2

                      Configuration Options
                      ---------------------
                text_editor : None
         cluster_local_path : None
      cluster_status_update : (600, 30)
               pythia8_path : /eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/HEPTools/pythia8 (user set)
                  hwpp_path : None (user set)
            pythia-pgs_path : None (user set)
                    td_path : None (user set)
               delphes_path : /eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/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 : /eos/home-c/cvu/Madgraph/MG5_aMC_v2_7_3/HEPTools/lhapdf6/bin/lhapdf-config (user set)
              f2py_compiler : None
                 hepmc_path : None (user set)
         cluster_retry_wait : 300
           fortran_compiler : None
                auto_update : 0 (user set)
        exrootanalysis_path : None (user set)
                    timeout : 60
               cpp_compiler : None
#************************************************************
#* MadGraph5_aMC@NLO *
#* *
#* * * *
#* * * * * *
#* * * * * 5 * * * * *
#* * * * * *
#* * * *
#* *
#* *
#* VERSION 2.7.3 2020-06-21 *
#* *
#* 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 SMwithHeavyScalarDim4Dim6_NoDecay_UFO
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~
set nb_core 60
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+ ta+
define l- = e- mu- ta-
define v = z w- w+
generate p p > hh > v v v
output GHH_Parameter_Scan_01
######################################################################
## PARAM_CARD AUTOMATICALY GENERATED BY MG5 ####
######################################################################
###################################
## INFORMATION FOR CKMBLOCK
###################################
BLOCK CKMBLOCK #
      1 2.277360e-01 # cabi
###################################
## INFORMATION FOR DIM6COEFF
###################################
BLOCK DIM6COEFF #
      1 5.000000e-02 # rhoh
      2 5.000000e+03 # lambda
      3 6.500000e+02 # fw
      4 0.000000e+00 # fww
      5 0.000000e+00 # fb
      6 0.000000e+00 # fbb
###################################
## INFORMATION FOR MASS
###################################
BLOCK MASS #
      5 4.700000e+00 # mb
      6 1.720000e+02 # mt
      15 1.777000e+00 # mta
      23 9.118760e+01 # mz
      25 1.250000e+02 # mh
      254 6.000000e+02 # mhh
      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
      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 7.982436e+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 1.279000e+02 # aewm1
      2 1.166370e-05 # gf
      3 1.184000e-01 # as
###################################
## INFORMATION FOR YUKAWA
###################################
BLOCK YUKAWA #
      5 4.700000e+00 # ymb
      6 1.720000e+02 # ymt
      15 1.777000e+00 # ymtau
###################################
## INFORMATION FOR QNUMBERS 254
###################################
BLOCK QNUMBERS 254 # hh
      1 0 # 3 times electric charge
      2 1 # number of spin states (2s+1)
      3 1 # colour rep (1: singlet, 3: triplet, 8: octet)
      4 0 # particle/antiparticle distinction (0=own anti)
#
#*************************
# Decay widths *
#*************************
#
# PDG Width
DECAY 1 0.000000e+00
#
# PDG Width
DECAY 2 0.000000e+00
#
# PDG Width
DECAY 3 0.000000e+00
#
# PDG Width
DECAY 4 0.000000e+00
#
# PDG Width
DECAY 5 0.000000e+00
#
# PDG Width
DECAY 6 1.508336e+00
#
# PDG Width
DECAY 11 0.000000e+00
#
# PDG Width
DECAY 12 0.000000e+00
#
# PDG Width
DECAY 13 0.000000e+00
#
# PDG Width
DECAY 14 0.000000e+00
#
# PDG Width
DECAY 15 0.000000e+00
#
# PDG Width
DECAY 16 0.000000e+00
#
# PDG Width
DECAY 21 0.000000e+00
#
# PDG Width
DECAY 22 0.000000e+00
#
# PDG Width
DECAY 23 2.495200e+00
#
# PDG Width
DECAY 24 2.085000e+00
#
# PDG Width
DECAY 25 4.070000e-03
#
# PDG Width
DECAY 254 1.696710e-01
# BR NDA ID1 ID2 ...
   6.767804e-01 2 -24 24 # 0.114830007248
   3.232196e-01 2 23 23 # 0.0548409927516
#*********************************************************************
# 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 *
#*********************************************************************
#
#*********************************************************************
# 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 *
#*********************************************************************
  20000 = 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)
  average = event_norm ! average/sum. Normalization of the weight in the LHEF
# To see MLM/CKKW merging options: type "update MLM" or "update CKKW"

#*********************************************************************
#
#*********************************************************************
# 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)
#*********************************************************************
# Standard Cuts *
#*********************************************************************
# Minimum and maximum pt's (for max, -1 means no cut) *
#*********************************************************************
  {} = 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) *
#*********************************************************************
  {} = 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 *
#*********************************************************************
#*********************************************************************
# Minimum and maximum invariant mass for pairs *
#*********************************************************************
  {} = 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.
#*********************************************************************
# Inclusive cuts *
#*********************************************************************
  0.0 = ptheavy ! minimum pt for at least one heavy final state
#*********************************************************************
# 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.