NLO reweighting of a LO sample interrupted with KeyError

Hi,

This is not something which is going to work.
We can not reweight a LO sample to NLO accuracy within our framework.
MCFM author have a method for that and have paper in that direction (it is a phase space integration for each events obviously so might not be super fast).

Cheers,

Olivier

> On 18 Aug 2021, at 12:41, matteo maltoni <email address hidden> wrote:
>
> New question #698412 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/698412
>
> Dear MadGraph experts,
>
> I generated a LO sample with the SMEFTatNLO model: p p > l+ l- j j QCD=0 NP=0.
> I would like to reweight it into a NLO sample, so I modified the reweight_card into:
>
> change mode NLO
> change process p p > l+ l- j j QCD=0 NP=0 [QCD]
> launch
>
> The reweighting procedure is interrupted with the error
>
> Command "generate_events run_02" interrupted with error:
> KeyError : ((1, 5), (-13, 1, 5, 13))
> Please report this bug on https://bugs.launchpad.net/mg5amcnlo
> More information is found in '/home/matteo/Scrivania/MG5_aMC_v3_1_0/bin/pp_Z_lljj_EW/smdir_lljj/run_02_tag_1_debug.log'.
> Please attach this file to your report.
>
> Can you help me understand what's wrong?
>
> Another question: once the events will be reweighted, they won't be physical unless I don't shower them, am I right?
>
> Thank you,
>
> Matteo
>
>
> Please find below the debug.log file:
>
> set group_subprocesses Auto
> set ignore_six_quark_processes False
> set low_mem_multicore_nlo_generation False
> set complex_mass_scheme False
> set include_lepton_initiated_processes False
> set gauge unitary
> set loop_optimized_output True
> set loop_color_flows False
> set max_npoint_for_channel 0
> set default_unset_couplings 99
> 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 SMEFTatNLO-loopWWW
> define p = 21 2 4 1 3 -2 -4 -1 -3 5 -5 # pass to 5 flavors
> define j = p
> generate p p > l+ l- j j QCD=0 NP=0
> output pp_Z_lljj_EW/smdir_lljj
> ]]>
> </MG5ProcCard>
> <MGProcCard>
> #*********************************************************************
> # MadGraph/MadEvent *
> # http://madgraph.hep.uiuc.edu *
> # *
> # proc_card.dat *
> #*********************************************************************
> # *
> # This Files is generated by MADGRAPH 5 *
> # *
> # WARNING: This Files is generated for MADEVENT (compatibility issue)*
> # This files is NOT a valid MG4 proc_card.dat *
> # Running this in MG4 will NEVER reproduce the result of MG5*
> # *
> #*********************************************************************
> #*********************************************************************
> # Process(es) requested : mg2 input *
> #*********************************************************************
> # Begin PROCESS # This is TAG. Do not modify this line
> p p > l+ l- j j #Process
> # Be carefull the coupling are here in MG5 convention
> QCD=0
> NP=0
>
> end_coup # End the couplings input
>
> done # this tells MG there are no more procs
> # End PROCESS # This is TAG. Do not modify this line
> #*********************************************************************
> # Model information *
> #*********************************************************************
> # Begin MODEL # This is TAG. Do not modify this line
> SMEFTatNLO-loopWWW
> # End MODEL # This is TAG. Do not modify this line
> #*********************************************************************
> # Start multiparticle definitions *
> #*********************************************************************
> # Begin MULTIPARTICLES # This is TAG. Do not modify this line
>
> # End MULTIPARTICLES # This is TAG. Do not modify this line
> </MGProcCard>
> <MGRunCard>
> <![CDATA[
> #*********************************************************************
> # 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 *
> #*********************************************************************
> 10000 = nevents ! Number of unweighted events requested
> 39 = 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, 4=photon from muon *
> #*********************************************************************
> 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"
>
> #*********************************************************************
> #
> #*********************************************************************
> # Phase-Space Optimization strategy (basic options)
> #*********************************************************************
> 0 = nhel ! using helicities importance sampling or not.
> ! 0: sum over helicity, 1: importance sampling
> 2 = sde_strategy ! default integration strategy (hep-ph/2021.xxxxx)
> ! 1 is old strategy (using amp square)
> ! 2 is new strategy (using only the denominator)
> # To see advanced option for Phase-Space optimization: type "update psoptim"
> #*********************************************************************
> # 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) *
> #*********************************************************************
> 25.0 = ptj ! minimum pt for the jets
> 25.0 = ptl ! minimum pt for the charged leptons
> -1.0 = ptjmax ! maximum pt for the jets
> -1.0 = ptlmax ! maximum pt for the charged leptons
> {} = 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
> 2.4 = etal ! max rap for the charged leptons
> 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 *
> #*********************************************************************
> 0.4 = drjj ! min distance between jets
> 0.4 = drll ! min distance between leptons
> 0.4 = drjl ! min distance between jet and lepton
> -1.0 = drjjmax ! max distance between jets
> -1.0 = drllmax ! max distance between leptons
> -1.0 = drjlmax ! max distance between jet and lepton
> #*********************************************************************
> # Minimum and maximum invariant mass for pairs *
> #*********************************************************************
> 1000.0 = mmjj ! min invariant mass of a jet pair
> 81.2 = mmll ! min invariant mass of l+l- (same flavour) lepton pair
> -1.0 = mmjjmax ! max invariant mass of a jet pair
> 101.2 = 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 / neutrino *
> # for pair of lepton includes only same flavor, opposite charge
> #*********************************************************************
> 20.0 = 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 = xptj ! minimum pt for at least one jet
> 0.0 = xptl ! minimum pt for at least one charged lepton
> #*********************************************************************
> # Control the pt's of the jets sorted by pt *
> #*********************************************************************
> 85.0 = ptj1min ! minimum pt for the leading jet in pt
> 80.0 = ptj2min ! minimum pt for the second 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
> 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
> -1.0 = ptl1max ! maximum pt for the leading lepton in pt
> -1.0 = ptl2max ! maximum pt for the second 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)
> #*********************************************************************
> # WBF cuts *
> #*********************************************************************
> 0.0 = xetamin ! minimum rapidity for two jets in the WBF case
> 2.0 = deltaeta ! minimum rapidity for two jets in the WBF case
> #*********************************************************************
> # 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'
> ]]>
> </MGRunCard>
> <slha>
> ######################################################################
> ## 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 DIM6
> ###################################
> Block dim6
> 1 1.000000e+03 # Lambda
>
> ###################################
> ## INFORMATION FOR MASS
> ###################################
> Block mass
> 6 1.720000e+02 # MT
> 23 9.118760e+01 # MZ
> 24 7.982440e+01 # MW
> 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
> 15 0.000000e+00 # ta- : 0.0
> 16 0.000000e+00 # vt : 0.0
> 21 0.000000e+00 # g : 0.0
> 22 0.000000e+00 # a : 0.0
> 9000002 9.118760e+01 # ghz : MZ
> 9000003 7.982440e+01 # ghwp : MW
> 9000004 7.982440e+01 # ghwm : MW
>
> ###################################
> ## INFORMATION FOR RENOR
> ###################################
> Block renor
> 1 5.550000e+02 # mueft
>
> ###################################
> ## INFORMATION FOR SMINPUTS
> ###################################
> Block sminputs
> 2 1.166370e-05 # Gf
> 3 1.184000e-01 # aS (Note that Parameter not used if you use a PDF set)
>
> ###################################
> ## INFORMATION FOR YUKAWA
> ###################################
> Block yukawa
> 6 1.720000e+02 # ymt
>
> ###################################
> ## INFORMATION FOR DECAY
> ###################################
> DECAY 6 1.508336e+00 # WT
> DECAY 23 2.495200e+00 # WZ
> DECAY 24 2.085000e+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 0.000000e+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
> DECAY 9000002 2.495200e+00 # ghz : WZ
> DECAY 9000003 2.085000e+00 # ghwp : WW
> DECAY 9000004 2.085000e+00 # ghwm : WW
> #===========================================================
> # QUANTUM NUMBERS OF NEW STATE(S) (NON SM PDG CODE)
> #===========================================================
>
> Block QNUMBERS 9000001 # gha
> 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 1 # Particle/Antiparticle distinction (0=own anti)
> Block QNUMBERS 9000002 # ghz
> 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 1 # Particle/Antiparticle distinction (0=own anti)
> Block QNUMBERS 9000003 # ghwp
> 1 3 # 3 times electric charge
> 2 1 # number of spin states (2S+1)
> 3 1 # colour rep (1: singlet, 3: triplet, 8: octet)
> 4 1 # Particle/Antiparticle distinction (0=own anti)
> Block QNUMBERS 9000004 # ghwm
> 1 -3 # 3 times electric charge
> 2 1 # number of spin states (2S+1)
> 3 1 # colour rep (1: singlet, 3: triplet, 8: octet)
> 4 1 # Particle/Antiparticle distinction (0=own anti)
> Block QNUMBERS 9000005 # ghg
> 1 0 # 3 times electric charge
> 2 1 # number of spin states (2S+1)
> 3 8 # colour rep (1: singlet, 3: triplet, 8: octet)
> 4 1 # Particle/Antiparticle distinction (0=own anti)
> </slha>
> <MGGenerationInfo>
> # Number of Events : 10000
> # Integrated weight (pb) : 0.059116646759520004
> </MGGenerationInfo>
> </header>
> </LesHouchesEvents>
>
>
>
> --
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