How to generate p p→ γ ax j j
Dear experts:
When generating events for
import model ALP
p p > ax j j /p h QED=2 NP=1, ax > a z
output axγjj
launch axγjj
I found the finished events much less than the events that I want(I change the relevant parameter to insure the correct decay chain,and I use the madgraph2.6.7
The run_card.dat is as follows.
#******
# 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 to_full *
#******
#
#******
# 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 *
#******
10 = 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=elastic photon of proton/ion beam *
# +/-3=PDF of electron/positron beam *
# +/-4=PDF of muon/antimuon beam *
#******
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 alpha_s and its evol. *
# pdlabel: lhapdf=LHAPDF (installation needed) [1412.7420] *
# iww=Improved Weizsaecker-
# eva=Effective W/Z/A Approx. [2111.02442] *
# edff=EDFF in gamma-UPC [eq.(11) in 2207.03012] *
# chff=ChFF in gamma-UPC [eq.(13) in 2207.03012] *
# none=No PDF, same as lhapdf with lppx=0 *
#******
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.
1 = sde_strategy ! default integration strategy (hep-ph/2021.00773)
! 2 is new strategy (using only the denominator)
# To see advanced option for Phase-Space optimization: type "update psoptim"
#******
# Customization (custom cuts/scale/
# list of files containing fortran function that overwrite default *
#******
= custom_fcts ! List of files containing user hook function
#******
# Parton level cuts definition *
#******
0.0 = dsqrt_shat ! minimal shat for full process
#
#
#******
# BW cutoff (M+/-bwcutoff*
#******
15.0 = bwcutoff ! (M+/-bwcutoff*
#*****
# Apply pt/E/eta/
# (note that etmiss/
#*****
True = cut_decays ! Cut decay products
#******
# Standard Cuts *
#******
# Minimum and maximum pt's (for max, -1 means no cut) *
#******
5.0 = ptj ! minimum pt for the jets
2.0 = pta ! minimum pt for the photons
1000.0 = ptjmax ! maximum pt for the jets
1000.0 = ptamax ! maximum pt for the photons
{} = 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) *
#******
9.0 = etaj ! max rap for the jets
9.0 = etaa ! max rap for the photons
0.0 = etajmin ! min rap for the jets
0.0 = etaamin ! min rap for the photons
{} = 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 *
#******
0.01 = drjj ! min distance between jets
0.01 = draj ! min distance between gamma and jet
-1.0 = drjjmax ! max distance between jets
-1.0 = drajmax ! max distance between gamma and jet
#******
# 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_
#******
# Inclusive cuts *
#******
0.0 = ptheavy ! minimum pt for at least one heavy final state
0.0 = xptj ! minimum pt for at least one jet
#*****
# 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
-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 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)
#*****
# 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
#******
# 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
#
systematics = systematics_program ! none, systematics [python], SysCalc [depreceted, C++]
['--mur=0.5,1,2', '--muf=0.5,1,2', '--pdf=errorset'] = systematics_
Question information
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- English Edit question
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- Solved by:
- Olivier Mattelaer
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