Hello, I am using the run cards below to generate a cross section for p p > ta+ ta- b b~ on the http://madgraph.hep.uiuc.edu/ server and I keep getting an error of Zero Result. I have the same error for the RS model p p > h h , ( h > b b~ , h > ta+ ta- ) process. I have generated this processes before with the same cards and have gotten a result. I saw the possible list of suggestions as to when such results could appear, but did not think my process satisfied any of them. Any help resolving this would be much appreciated. Best Regards, Nikolina Ilic #********************************************************************* # * # MadGraph5_aMC@NLO * # * # Going Beyond * # * # http://madgraph.hep.uiuc.edu * # http://madgraph.phys.ucl.ac.be * # http://amcatnlo.cern.ch * # * # The MadGraph5_aMC@NLO team * # * #....................................................................* # * # This file contains all the information necessary to reproduce * # the events generated: * # * # 1. software version * # 2. proc_card : code generation info including model * # 3. param_card : model primary parameters in the LH format * # 4. run_card : running parameters (collider and cuts) * # 5. pythia_card : present only if pythia has been run * # 6. pgs_card : present only if pgs has been run * # 7. delphes_cards : present only if delphes has been run * # * # * #********************************************************************* --> #5.2.3.0 #************************************************************ #* MadGraph5_aMC@NLO * #* * #* * * * #* * * * * * #* * * * * 5 * * * * * #* * * * * * #* * * * #* * #* * #* VERSION 2.3.0 2015-07-01 * #* BZR www 98 * #* * #* 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 * #* * #************************************************************ import model sm define j = g u c d s u~ c~ d~ s~ define p = g u c d s u~ c~ d~ s~ define j = p define l+ = e+ mu+ define l- = e- mu- define vl = ve vm vt define vl~ = ve~ vm~ vt~ generate p p > b b~ ta+ ta- output madevent -f #********************************************************************* # 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. * #********************************************************************* 10000 = 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 ! Select one of the preselect dynamical choice 1.0 = scalefact ! scale factor for event-by-event scales #********************************************************************* # Time of flight information. (-1 means not run) #********************************************************************* -1.0 = time_of_flight ! threshold below which info is not written #********************************************************************* # Matching - Warning! ickkw > 1 is still beta #********************************************************************* 0 = 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 False = chcluster ! cluster only according to channel diag True = pdfwgt ! for ickkw=1, perform pdf reweighting 4 = asrwgtflavor ! highest quark flavor for a_s reweight True = clusinfo ! include clustering tag in output 3.0 = lhe_version ! Change the way clustering information pass to shower. #********************************************************************* #********************************************************** # #********************************************************** # Automatic ptj and mjj cuts if xqcut > 0 # (turn off for VBF and single top processes) #********************************************************** True = auto_ptj_mjj ! Automatic setting of ptj and mjj #********************************************************** # #********************************** # BW cutoff (M+/-bwcutoff*Gamma) #********************************** 15.0 = 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) #********************************************************** False = 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) * #********************************************************************* 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 #********************************************************************* # KT DURHAM CUT * #********************************************************************* -1.0 = ktdurham 0.4 = dparameter #********************************************************************* # maximal pdg code for quark to be considered as a light jet * # (otherwise b cuts are applied) * #********************************************************************* 4 = maxjetflavor ! Maximum jet pdg code #********************************************************************* # Jet measure cuts * #********************************************************************* 0.0 = 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! * #********************************************************************* 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 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 ###################################################################### ## 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 5 4.700000e+00 # MB 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 0.000000 # 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 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 0.000000 # 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

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