MadGraph5_aMC@NLO interfacing #34
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…ton MG5 processes
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This PR introduces a wrapper around MadGraph5_aMC@NLO to allow generating externally the s-matrix for 2-to-4 processes, including advanced SM or exotic models involving two-photon initial states.
Given the recent work on the stripping of the parton fluxes factorisation from the core process (see #30 and #32), both the kT and collinear parton emissions are supported.
The
MADGRAPH_DIRuser environment variable can be used to steer the setup path for the MadGraph executable (to be found in$MADGRAPH_DIR/bin/mg5_aMC).For comparison, the two-photon production of muon pairs (with muons transverse energy above 25 GeV) is shown along with the LPAIR/PPtoLL processes predictions: