MG/ME generates less events than requested

Hi,

First you need to set cut_decays to True, otherwise you will not have any cut on your FSR photon.
Then I guess that a pt cut on the photon and a deltaR with the jet should be enough.
(You might want to remove the other cut on the c c~ pair but this is up to you)

Cheers,

Olivier

> On Nov 11, 2016, at 16:32, Felipe Silva <email address hidden> wrote:
>
> New question #403991 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/403991
>
> Hello everyone,
>
> When I try to generate 300 kEvts of the process "p p > z , z > a c c~" I get only 2096 Evts. I know it is something related with integration over divergencies, but I don't know exactly which should I apply in order to get a bigger proportion.
>
> Any ideas?
>
> The run_card.dat can be found bellow.
>
> The complete folder with the process can be downloaded on this link: https://www.dropbox.com/s/moigrhoe7j9go8q/ztoccbargamma.zip?dl=1
>
>
> Thanks in advance.
>
> Felipe
>
>
> #*********************************************************************
> # 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
> #*********************************************************************
> # 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. *
> #*********************************************************************
> 300000 = 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
> #*********************************************************************
> # Beam polarization from -100 (left-handed) to 100 (right-handed) *
> #*********************************************************************
> 0.0 = polbeam1 ! beam polarization for beam 1
> 0.0 = polbeam2 ! beam polarization for beam 2
> #*********************************************************************
> # 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
> #*********************************************************************
> # 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)
> #*********************************************************************
> 0 = ickkw ! 0 no matching, 1 MLM
> 1.0 = alpsfact ! scale factor for QCD emission vx
> False = chcluster ! cluster only according to channel diag
> 4 = 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)
> 0.0 = 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)
> 0.0 = ptheavy ! minimum pt for one heavy final state
> -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)
> #*********************************************************************
> # Minimum and maximum E's (in the center of mass frame) *
> #*********************************************************************
> 0.0 = ej ! minimum E for the jets
> 0.0 = eb ! minimum E for the b
> 0.0 = ea ! minimum E for the photons
> 0.0 = el ! minimum E for the charged leptons
> -1.0 = ejmax ! maximum E for the jets
> -1.0 = ebmax ! maximum E for the b
> -1.0 = eamax ! maximum E for the photons
> -1.0 = elmax ! maximum E for the charged leptons
> #*********************************************************************
> # 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
> #*********************************************************************
> # Minimum and maximum DeltaR distance *
> #*********************************************************************
> 0.4 = 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
> 0.4 = 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
> #*********************************************************************
> # 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 = 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) *
> #*********************************************************************
> 4 = 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
> #
> #**************************************
> # Parameter of the systematics study
> # will be used by SysCalc (if installed)
> #**************************************
> #
> 0.5 1 2 = sys_scalefact # factorization/renormalization scale factor
> None = sys_alpsfact # \alpha_s emission scale factors
> auto = sys_matchscale # variation of merging scale
> # PDF sets and number of members (0 or none for all members).
> NNPDF23_lo_as_0130_qed = sys_pdf # separate by && if more than one set.
> # MSTW2008nlo68cl.LHgrid 1 = sys_pdf
> #
>
>
> --
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