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Update notes for MadGraph5_aMC@NLO (in reverse time order)
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DP+HS+IT+MZ: EW corrections can be computed for tagged photons
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OM+RR+AC: Implementation of EWA within MG5aMC (PDF for W/Z boson out of lepton beam)
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MZ+CS: A fix in amcatnlo_run_interface to prevent integer overflows when a
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very high precision is requested.
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MZ+CS: Fixes/improvements relevant to PineAPPL:
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- the function pineappl_grid_optimize is called by pineappl_interface,
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to reduce the size of the grids. PineAPPL v0.5 or later is required
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- minor fix on the gluon pdg code in pineappl_interface.cc
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- the integration channels are threated the same way with or without PineAPPL
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(maxchannels is kept the same in both cases)
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RF: Fix for montecarlocounter in case the Born is not strictly positive
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(i.e., only interference contributions).
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RF+IT: Rewritten the clustering code for FxFx. This allows for
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seperation of QCD and EW jets. Needs special JetMatching.h for
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Pythia8 (can be found in Template/NLO/MCatNLO/Scripts/JetMatching.h)
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OM: adding a new cut dsqrt_shat to set a minimum center of mass energy cut
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OM: allow the support of latest LUX PDF with lepton content of the proton
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Note that running PY8 is automatically forbidden in that case.
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ALL: include bug fixing from Long Term Stable version version (2.9.6) see below
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OM+RR: better handling of multiparticles with both photon and massive vector when
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the user ask for longitudinal polarization. longitudinal photon are automaticlly
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discarded. (This overwrite LTS fix that was simply making the code to crash)
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OM: Fixing a bug introduced in 3.1.0, with the automatic setup of FxFx
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OM: Code update to avoid randomness in ordering in code generation (only in debug mode)
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SF/OM/MZ/XZ: Implementation (at LO) of ISR and beamstrhalung for e+e- collider
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BUG FIX (from 2.9.5 long term stable, see below)
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** Long Term Stable Update **
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OM: Forbid the possibity to ask for massless boson to be longitudinally polarised.
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Asking for those with large multi-particle label could have hide the fact that the code
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was returning a non zero cross-section for such request.
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OM: for process like p p > w+{X} w+{Y}, w+ > l+ vl
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i.e. process with polarization of identical particle where the decay involves multi-particles and
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where the lepton does not all have the same mass, some of the process were incorrectly discarded.
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OM: fix an issue for photon initial state with lpp=+-4 where the lhef output was not setting the muon
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as the correct colliding particles (thanks to Yuunjia Bao)
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OM: Fixing an issue that madspin was not always using the python executable that was used by the
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OM+PT: Change the shower script running pythia8 in order to be working with pythia8.3.
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Running with Pythia8.2 (or lower) is then not possible anymore.
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OM: Fix issue that some loop-induced processes were not working anymore since 2.9.0
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OM: Fix the default set of cut present in the default run_card if gluon were present in the final state but no
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light (or b) quark. The absence of those cuts, in that situation, were leading to hardcoded cut that was
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not easy to overwrite by non expert user.
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OM+LM: [LO only] Fix the factorization scale dependence for lpp=2/3/4.