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This page contain few instructions of how to generate varies MC samples

On this page:

Exclusive production (via proton or pomeron)


Madgraph is able to simulate both exclusive and inclusive γγ→XX processes (where either proton remain intact or dissociate). Here is an recommended settings for simulating MG exclusive events:

#common settings
set automatic_html_opening False

#set scale (new from 2.7.1)
set fixed_fac_scale True
set dsqrt_q2fact1 2
set dsqrt_q2fact2 2

# use elastic photons (will use EPA instead of PDF)
set lpp1 2  # proton 
set lpp2 2  # proton 

#if using inelastic photons, set up the PDF to LUXqed17_plus_PDF4LHC15_nnlo_100
#set lhaid 82200

Calculation of processes that include box diagrams at QED are available loop_qcd_qed_sm-full model, for example CEP of H500→tt can be calculated using:

import model loop_qcd_qed_sm-full
generate a a > h > t t~ [noborn=QED]
output cep_ttbar
launch cep_ttbar
set param_card mass 25 500.0
set param_card decay 25 68.0

Read LHE content

The LHE files can be explored via the LHEEventProduct objects:

Events->Scan("LHE.hepeup().IDUP : LHE.hepeup().ISTUP");

-- MichaelPitt - 2020-04-09

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Topic revision: r5 - 2020-07-13 - MichaelPitt
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