p p > t t~
Good day Madgraph expert,
I am trying to simulate, p p > t t~ at center of mass energy of 100 TeV and i want to put some cuts. I want that atleast 2 jets in an event has pt > 3000 GeV, |eta| < 3.0 and deltaEta(eta1,eta2) < 2.4 .
But in does not work,
Survey return zero cross section.
Typical reasons are the following:
1) A massive s-channel particle has a width set to zero.
2) The pdf are zero for at least one of the initial state particles
or you are using maxjetflavor=4 for initial state b:s.
3) The cuts are too strong.
Please check/correct your param_card and/or your run_card.
This is the banner text file that i used,
<LesHouchesEvents version="3.0">
<header>
<!--
#******
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# Going Beyond *
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# The MadGraph5_aMC@NLO team *
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# 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 *
# *
# *
#******
-->
<MGVersion>
3.1.1
</MGVersion>
<MG5ProcCard>
<![CDATA[
#******
#* MadGraph5_aMC@NLO *
#* *
#* * * *
#* * * * * *
#* * * * * 5 * * * * *
#* * * * * *
#* * * *
#* *
#* *
#* VERSION 3.1.1 2021-05-28 *
#* *
#* The MadGraph5_aMC@NLO Development Team - Find us at *
#* https:/
#* *
#******
#* *
#* Command File for MadGraph5_aMC@NLO *
#* *
#* run as ./bin/mg5_aMC filename *
#* *
#******
set group_subprocesses Auto
set ignore_
set max_t_for_channel 99
set loop_optimized_
set low_mem_
set default_
set include_
set zerowidth_tchannel True
set nlo_mixed_expansion True
set loop_color_flows False
set gauge unitary
set complex_mass_scheme False
set max_npoint_
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~
define p = p b b~
define j = j b b~
generate p p > t t~
output ttbar1_background
]]>
</MG5ProcCard>
<MGRunCard>
<![CDATA[
#******
# MadGraph5_aMC@NLO *
# *
# run_card.dat MadEvent *
# *
# This file is used to set the parameters of the run. *
# *
# Some notation/
# *
# 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 *
#******
1071 = nevents ! Number of unweighted events requested
0 = iseed ! rnd seed (0=assigned automatically=
#******
# 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
50000.0 = ebeam1 ! beam 1 total energy in GeV
50000.0 = 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_
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.
2 = sde_strategy ! default integration strategy (hep-ph/2021.xxxxx)
! 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.
#******
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*
#******
15.0 = bwcutoff ! (M+/-bwcutoff*
#*****
# Apply pt/E/eta/
# (note that etmiss/
#*****
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
10.0 = ptl ! minimum pt for the charged leptons
0.0 = misset ! minimum missing Et (sum of neutrino's momenta)
-1.0 = ptjmax ! maximum pt for the jets
-1.0 = ptlmax ! maximum pt for the charged leptons
-1.0 = missetmax ! maximum missing Et (sum of neutrino's momenta)
{} = 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})
#******
# 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
{} = e_min_pdg ! E cut for other particles (use pdg code). Applied on particle and anti-particle
{} = e_max_pdg ! E cut for other particles (syntax e.g. {6: 100, 25: 50})
#******
# Maximum and minimum absolute rapidity (for max, -1 means no cut) *
#******
3.0 = etaj ! max rap for the jets
2.5 = 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 = drjl ! min distance between jet and lepton
-1.0 = drjjmax ! max distance between jets
-1.0 = drjlmax ! max distance between jet and lepton
#******
# Minimum and maximum invariant mass for pairs *
#******
0.0 = mmjj ! min invariant mass of a jet pair
-1.0 = mmjjmax ! max invariant mass of a jet pair
{} = mxx_min_pdg ! min invariant mass of a pair of particles X/X~ (e.g. {6:250})
{'default': False} = mxx_only_
#*****
# 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
#*****
#******
# Inclusive cuts *
#******
0.0 = xptj ! minimum pt for at least one jet
#*****
# Control the pt's of the jets sorted by pt *
#*****
3000.0 = ptj1min ! minimum pt for the leading jet in pt
3000.0 = 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 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
#*****
# WBF cuts *
#*****
0.0 = xetamin ! minimum rapidity for two jets in the WBF case
2.4 = 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_
# 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 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 0.000000e+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 8.041900e+01 # w+ : cmath.sqrt(
#######
## INFORMATION FOR SMINPUTS
#######
Block sminputs
1 1.325070e+02 # aEWM1
2 1.166390e-05 # Gf
3 1.180000e-01 # aS (Note that Parameter not used if you use a PDF set)
#######
## 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 0.000000e+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
</slha>
</header>
</LesHouchesEvents>
would you mind, helping me to fixed the cuts .
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