Single Top + Jets

Hi Benedikt,

This means that MG5_aMC@NLO has some trouble to determine how to write the color flow of some of the event.
I'm currently checking if this also happens in the official version 2.0.0 of the code. if yes, this will be fix for the next release,
otherwise this will be set on low priority (and will be fix before 2.1 will be release).

Cheers,

Olivier

On Dec 16, 2013, at 3:01 PM, Benedikt Maier <email address hidden> wrote:

> New question #240871 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/madgraph5/+question/240871
>
> Hi MG5 experts,
>
> I'm currently trying to generate single top + 2 additional jets with MG5. I just checked out revision 250 of MG5_aMC_2.1, but here is the error when I try to generate it:
>
>
> -------------------------------------------------------------------
> Generating 100000 events with run name run_01
> survey run_01
> INFO: compile directory
> run_card missed argument xmtcentral. Takes default: 0.0
> run_card missed argument d. Takes default: 1.0
> run_card missed argument gridrun. Takes default: False
> run_card missed argument gevents. Takes default: 2000
> run_card missed argument fixed_couplings. Takes default: True
> Since icckw>0, We change the value of 'drjj' to 0
> Since icckw>0, We change the value of 'drjl' to 0
> run_card missed argument lhaid. Takes default: 10042
> write compile file for card: /storage/8/bmaier/St_MG21/Cards/param_card.dat
> Using random number seed offset = 21
> INFO: Running Survey
> Creating Jobs
> Working on SubProcesses
> P0_gq_tbxggq
> P0_gg_tbxgqq
> P0_gq_tbqbxbx
> Command "generate_events run_01" interrupted with error:
> MadEventError : Error detected Stop running: Error: failed to reduce to color indices: 1 0
>
> Please report this bug on https://bugs.launchpad.net/madgraph5
> More information is found in '/storage/8/bmaier/St_MG21/run_01_tag_1_debug.log'.
> Please attach this file to your report.
> ---------------------------------------------------------------------------
>
> I post the debug.log file below:
>
> ---------------------------------------------------------------------------
>
> #************************************************************
> #* MadGraph5_aMC@NLO/MadEvent *
> #* *
> #* * * *
> #* * * * * *
> #* * * * * 5 * * * * *
> #* * * * * *
> #* * * *
> #* *
> #* *
> #* VERSION 2.0.0.GM 2013-11-04 *
> #* *
> #* 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 *
> #* *
> #************************************************************
> generate_events run_01
> Traceback (most recent call last):
> File "/portal/ekpcms5/home/bmaier/Programs/MG5_aMC_2.1/madgraph/interface/extended_cmd.py", line 841, in onecmd
> return self.onecmd_orig(line, **opt)
> File "/portal/ekpcms5/home/bmaier/Programs/MG5_aMC_2.1/madgraph/interface/extended_cmd.py", line 834, in onecmd_orig
> return func(arg, **opt)
> File "/portal/ekpcms5/home/bmaier/Programs/MG5_aMC_2.1/madgraph/interface/madevent_interface.py", line 2183, in do_generate_events
> postcmd=False)
> File "/portal/ekpcms5/home/bmaier/Programs/MG5_aMC_2.1/madgraph/interface/extended_cmd.py", line 881, in exec_cmd
> stop = Cmd.onecmd_orig(current_interface, line, **opt)
> File "/portal/ekpcms5/home/bmaier/Programs/MG5_aMC_2.1/madgraph/interface/extended_cmd.py", line 834, in onecmd_orig
> return func(arg, **opt)
> File "/portal/ekpcms5/home/bmaier/Programs/MG5_aMC_2.1/madgraph/interface/madevent_interface.py", line 2604, in do_survey
> open(pjoin(self.me_dir,'error')).read()
> MadEventError: Error detected Stop running: Error: failed to reduce to color indices: 1 0
>
> Run Options
> -----------
> stdout_level : 10 (user set)
>
> MadEvent Options
> ----------------
> automatic_html_opening : False (user set)
> cluster_temp_path : None
> cluster_queue : None (user set)
> cluster_memory : None (user set)
> cluster_time : None (user set)
> nb_core : 24 (user set)
> run_mode : 2
>
> Configuration Options
> ---------------------
> web_browser : None
> text_editor : None
> pythia-pgs_path : None (user set)
> td_path : None (user set)
> delphes_path : None (user set)
> thepeg_path : None (user set)
> cluster_type : condor
> madanalysis_path : None (user set)
> cluster_nb_retry : 1
> timeout : 60
> fortran_compiler : None
> auto_update : 7 (user set)
> exrootanalysis_path : None (user set)
> cluster_status_update : (600, 30)
> eps_viewer : None
> syscalc_path : None (user set)
> hepmc_path : None (user set)
> pythia8_path : None (user set)
> hwpp_path : None (user set)
> cluster_retry_wait : 300
> #************************************************************
> #* MadGraph5_aMC@NLO *
> #* *
> #* * * *
> #* * * * * *
> #* * * * * 5 * * * * *
> #* * * * * *
> #* * * *
> #* *
> #* *
> #* VERSION 2.0.0.GM 2013-11-04 *
> #* *
> #* 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 group_subprocesses Auto
> set ignore_six_quark_processes False
> set loop_optimized_output True
> set gauge unitary
> set complex_mass_scheme False
> import model sm
> define j = g u c d s u~ c~ d~ s~
> define l+ = e+ mu+
> define l- = e- mu-
> define j = g u c d s b u~ c~ d~ s~ b~
> define p = g u c d s u~ c~ d~ s~
> define l+ = e+ mu+ ta+
> define l- = e- mu- ta-
> define vl = ve vm vt
> define vl~ = ve~ vm~ vt~
> define tt s
> define tt = t t~
> define bb = b b~
> generate p p > tt bb j j j $$ w+ w-
> output /storage/8/bmaier/St_MG21
> ######################################################################
> ## 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. By default, ##
> ## this is only 1->2 decay modes. ##
> ## ##
> ######################################################################
>
> ###################################
> ## INFORMATION FOR MASS
> ###################################
> Block mass
> 5 4.700000e+00 # MB
> 6 1.730000e+02 # MT
> 15 1.777000e+00 # MTA
> 23 9.118800e+01 # MZ
> 25 1.200000e+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 0.000000 # d : 0.0
> 2 0.000000 # u : 0.0
> 3 0.000000 # s : 0.0
> 4 0.000000 # c : 0.0
> 11 0.000000 # e- : 0.0
> 12 0.000000 # ve : 0.0
> 13 0.000000 # mu- : 0.0
> 14 0.000000 # vm : 0.0
> 16 0.000000 # vt : 0.0
> 21 0.000000 # g : 0.0
> 22 0.000000 # a : 0.0
> 24 80.419002 # 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
> 5 4.700000e+00 # ymb
> 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 5.753088e-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 0.000000 # d : 0.0
> DECAY 2 0.000000 # u : 0.0
> DECAY 3 0.000000 # s : 0.0
> DECAY 4 0.000000 # c : 0.0
> DECAY 5 0.000000 # b : 0.0
> DECAY 11 0.000000 # e- : 0.0
> DECAY 12 0.000000 # ve : 0.0
> DECAY 13 0.000000 # mu- : 0.0
> DECAY 14 0.000000 # vm : 0.0
> DECAY 15 0.000000 # ta- : 0.0
> DECAY 16 0.000000 # vt : 0.0
> DECAY 21 0.000000 # g : 0.0
> DECAY 22 0.000000 # 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 *
> #*********************************************************************
> #
> #*******************
> # Running parameters
> #*******************
> #
> #*********************************************************************
> # Tag name for the run (one word) *
> #*********************************************************************
> tag_1 = run_tag ! name of the run
> #*********************************************************************
> # Run to generate the grid pack *
> #*********************************************************************
> .false. = gridpack !True = setting up the grid pack
> #*********************************************************************
> # Number of events and rnd seed *
> # Warning: Do not generate more than 1M events in a single run *
> # If you want to run Pythia, avoid more than 50k events in a run. *
> #*********************************************************************
> 100000 = 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
> 4000 = ebeam1 ! beam 1 total energy in GeV
> 4000 = ebeam2 ! beam 2 total energy in GeV
> #*********************************************************************
> # Beam polarization from -100 (left-handed) to 100 (right-handed) *
> #*********************************************************************
> 0 = polbeam1 ! beam polarization for beam 1
> 0 = polbeam2 ! beam polarization for beam 2
> #*********************************************************************
> # PDF CHOICE: this automatically fixes also alpha_s and its evol. *
> #*********************************************************************
> 'cteq6l1' = pdlabel ! PDF set
> #*********************************************************************
> # Renormalization and factorization scales *
> #*********************************************************************
> F = fixed_ren_scale ! if .true. use fixed ren scale
> F = fixed_fac_scale ! if .true. use fixed fac scale
> 91.1880 = scale ! fixed ren scale
> 91.1880 = dsqrt_q2fact1 ! fixed fact scale for pdf1
> 91.1880 = dsqrt_q2fact2 ! fixed fact scale for pdf2
> 1 = scalefact ! scale factor for event-by-event scales
> #*********************************************************************
> # Matching - Warning! ickkw > 1 is still beta
> #*********************************************************************
> 1 = ickkw ! 0 no matching, 1 MLM, 2 CKKW matching
> 1 = highestmult ! for ickkw=2, highest mult group
> 1 = ktscheme ! for ickkw=1, 1 Durham kT, 2 Pythia pTE
> 1 = alpsfact ! scale factor for QCD emission vx
> F = chcluster ! cluster only according to channel diag
> T = pdfwgt ! for ickkw=1, perform pdf reweighting
> 5 = asrwgtflavor ! highest quark flavor for a_s reweight
> T = clusinfo ! include clustering tag in output
> #*********************************************************************
> #**********************************************************
> #
> #**********************************************************
> # Automatic ptj and mjj cuts if xqcut > 0
> # (turn off for VBF and single top processes)
> #**********************************************************
> T = auto_ptj_mjj ! Automatic setting of ptj and mjj
> #**********************************************************
> #
> #**********************************
> # BW cutoff (M+/-bwcutoff*Gamma)
> #**********************************
> 15 = bwcutoff ! (M+/-bwcutoff*Gamma)
> #**********************************************************
> # Apply pt/E/eta/dr/mij cuts on decay products or not
> # (note that etmiss/ptll/ptheavy/ht/sorted cuts always apply)
> #**********************************************************
> T = cut_decays ! Cut decay products
> #*************************************************************
> # Number of helicities to sum per event (0 = all helicities)
> # 0 gives more stable result, but longer run time (needed for
> # long decay chains e.g.).
> # Use >=2 if most helicities contribute, e.g. pure QCD.
> #*************************************************************
> 0 = nhel ! Number of helicities used per event
> #*******************
> # Standard Cuts
> #*******************
> #
> #*********************************************************************
> # Minimum and maximum pt's (for max, -1 means no cut) *
> #*********************************************************************
> 10 = ptj ! minimum pt for the jets
> 0 = ptb ! minimum pt for the b
> 10 = pta ! minimum pt for the photons
> 10 = ptl ! minimum pt for the charged leptons
> 0 = misset ! minimum missing Et (sum of neutrino's momenta)
> 0 = ptheavy ! minimum pt for one heavy final state
> 1.0 = ptonium ! minimum pt for the quarkonium states
> -1 = ptjmax ! maximum pt for the jets
> -1 = ptbmax ! maximum pt for the b
> -1 = ptamax ! maximum pt for the photons
> -1 = ptlmax ! maximum pt for the charged leptons
> -1 = missetmax ! maximum missing Et (sum of neutrino's momenta)
> #*********************************************************************
> # Minimum and maximum E's (in the lab frame) *
> #*********************************************************************
> 0 = ej ! minimum E for the jets
> 0 = eb ! minimum E for the b
> 0 = ea ! minimum E for the photons
> 0 = el ! minimum E for the charged leptons
> -1 = ejmax ! maximum E for the jets
> -1 = ebmax ! maximum E for the b
> -1 = eamax ! maximum E for the photons
> -1 = elmax ! maximum E for the charged leptons
> #*********************************************************************
> # Maximum and minimum absolute rapidity (for max, -1 means no cut) *
> #*********************************************************************
> 5 = etaj ! max rap for the jets
> -1 = etab ! max rap for the b
> 2.5 = etaa ! max rap for the photons
> 2.5 = etal ! max rap for the charged leptons
> 0.6 = etaonium ! max rap for the quarkonium states
> 0 = etajmin ! min rap for the jets
> 0 = etabmin ! min rap for the b
> 0 = etaamin ! min rap for the photons
> 0 = etalmin ! main rap for the charged leptons
> #*********************************************************************
> # Minimum and maximum DeltaR distance *
> #*********************************************************************
> 0.01 = drjj ! min distance between jets
> 0 = drbb ! min distance between b's
> 0.01 = drll ! min distance between leptons
> 0.01 = draa ! min distance between gammas
> 0 = drbj ! min distance between b and jet
> 0.01 = draj ! min distance between gamma and jet
> 0.01 = drjl ! min distance between jet and lepton
> 0 = drab ! min distance between gamma and b
> 0 = drbl ! min distance between b and lepton
> 0.01 = dral ! min distance between gamma and lepton
> -1 = drjjmax ! max distance between jets
> -1 = drbbmax ! max distance between b's
> -1 = drllmax ! max distance between leptons
> -1 = draamax ! max distance between gammas
> -1 = drbjmax ! max distance between b and jet
> -1 = drajmax ! max distance between gamma and jet
> -1 = drjlmax ! max distance between jet and lepton
> -1 = drabmax ! max distance between gamma and b
> -1 = drblmax ! max distance between b and lepton
> -1 = dralmax ! maxdistance between gamma and lepton
> #*********************************************************************
> # Minimum and maximum invariant mass for pairs *
> #*********************************************************************
> 0 = mmjj ! min invariant mass of a jet pair
> 0 = mmbb ! min invariant mass of a b pair
> 0 = mmaa ! min invariant mass of gamma gamma pair
> 0 = mmll ! min invariant mass of l+l- (same flavour) lepton pair
> -1 = mmjjmax ! max invariant mass of a jet pair
> -1 = mmbbmax ! max invariant mass of a b pair
> -1 = mmaamax ! max invariant mass of gamma gamma pair
> -1 = mmllmax ! max invariant mass of l+l- (same flavour) lepton pair
> #*********************************************************************
> # Minimum and maximum invariant mass for all letpons *
> #*********************************************************************
> 0 = mmnl ! min invariant mass for all letpons (l+- and vl)
> -1 = mmnlmax ! max invariant mass for all letpons (l+- and vl)
> #*********************************************************************
> # Minimum and maximum pt for 4-momenta sum of leptons *
> #*********************************************************************
> 0 = ptllmin ! Minimum pt for 4-momenta sum of leptons(l and vl)
> -1 = ptllmax ! Maximum pt for 4-momenta sum of leptons(l and vl)
> #*********************************************************************
> # Inclusive cuts *
> #*********************************************************************
> 0 = xptj ! minimum pt for at least one jet
> 0 = xptb ! minimum pt for at least one b
> 0 = xpta ! minimum pt for at least one photon
> 0 = xptl ! minimum pt for at least one charged lepton
> #*********************************************************************
> # Control the pt's of the jets sorted by pt *
> #*********************************************************************
> 0 = ptj1min ! minimum pt for the leading jet in pt
> 0 = ptj2min ! minimum pt for the second jet in pt
> 0 = ptj3min ! minimum pt for the third jet in pt
> 0 = ptj4min ! minimum pt for the fourth jet in pt
> -1 = ptj1max ! maximum pt for the leading jet in pt
> -1 = ptj2max ! maximum pt for the second jet in pt
> -1 = ptj3max ! maximum pt for the third jet in pt
> -1 = 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 = ptl1min ! minimum pt for the leading lepton in pt
> 0 = ptl2min ! minimum pt for the second lepton in pt
> 0 = ptl3min ! minimum pt for the third lepton in pt
> 0 = ptl4min ! minimum pt for the fourth lepton in pt
> -1 = ptl1max ! maximum pt for the leading lepton in pt
> -1 = ptl2max ! maximum pt for the second lepton in pt
> -1 = ptl3max ! maximum pt for the third lepton in pt
> -1 = ptl4max ! maximum pt for the fourth lepton in pt
> #*********************************************************************
> # Control the Ht(k)=Sum of k leading jets *
> #*********************************************************************
> 0 = htjmin ! minimum jet HT=Sum(jet pt)
> -1 = htjmax ! maximum jet HT=Sum(jet pt)
> 0 = ihtmin !inclusive Ht for all partons (including b)
> -1 = ihtmax !inclusive Ht for all partons (including b)
> 0 = ht2min ! minimum Ht for the two leading jets
> 0 = ht3min ! minimum Ht for the three leading jets
> 0 = ht4min ! minimum Ht for the four leading jets
> -1 = ht2max ! maximum Ht for the two leading jets
> -1 = ht3max ! maximum Ht for the three leading jets
> -1 = 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 = 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 = xetamin ! minimum rapidity for two jets in the WBF case
> 0 = deltaeta ! minimum rapidity for two jets in the WBF case
> #*********************************************************************
> # KT DURHAM CUT *
> #*********************************************************************
> -1 = ktdurham
> 0.4 = dparameter
> #*********************************************************************
> # maximal pdg code for quark to be considered as a light jet *
> # (otherwise b cuts are applied) *
> #*********************************************************************
> 5 = maxjetflavor ! Maximum jet pdg code
> #*********************************************************************
> # Jet measure cuts *
> #*********************************************************************
> 0 = xqcut ! minimum kt jet measure between partons
> #*********************************************************************
> #
> #*********************************************************************
> # Store info for systematics studies *
> # WARNING: If use_syst is T, matched Pythia output is *
> # meaningful ONLY if plotted taking matchscale *
> # reweighting into account! *
> #*********************************************************************
> F = use_syst ! Enable systematics studies
> #
> #**************************************
> # Parameter of the systematics study
> # will be use by SysCalc (if install)
> #**************************************
> #
> 0.5 1 2 = sys_scalefact # Central scale factors
> 0.5 1 2 = sys_alpsfact # \alpha_s emission scale factors
> 30 50 = sys_matchscale # variation of merging scale
> # PDF sets and number of members (0 or none for all members).
> CT10nlo.LHgrid = sys_pdf # matching scales
> # MSTW2008nlo68cl.LHgrid 1 = sys_pdf
>
>
> Any help for what this "reducing color indices" actually means is appreciated :)
>
> Thank you!
> Benedikt
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Hi Benedikt,

The branch you are using, MG5_aMC_2.1, is in development and no public. It is therefore not guaranteed stable.
Please use the official release 2.0.0 and let us know if you encounter the same bug there.

Cheers,

Hi Olivier,

I tried it with the official version, and it worked!

Thanks and cheers,

Benedikt

Hi,

I am using the updated version 2.0.1 ( MG5_aMC_v2_0_1) and I am also getting similar error while generating my process :

"run_card missed argument ptgmin. Takes default: 0.0
run_card missed argument R0gamma. Takes default: 0.4
run_card missed argument xn. Takes default: 1.0
run_card missed argument epsgamma. Takes default: 1.0
run_card missed argument isoEM. Takes default: True
run_card missed argument ktdurham. Takes default: -1
run_card missed argument dparameter. Takes default: 0.4
run_card missed argument use_syst. Takes default: False
run_card missed argument clusinfo. Takes default: False"

What should I do in this case?

Thank you,
Swasti.

Hi,

This means that you are using a run_card which is not the most up-to-date format.
So they are some information missing and we just use the default for them and inform you about that.
The solution is to add those parameter in your run_card and/or restart your file from the default file.

But in practise, they are nothing to really worry about that.

Cheers,

Olivier

Thank you very much Oliver.

Cheers,
Swasti.