MadGraph5_aMC@NLO

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3.1.x (EW) release from the 3.0 series released 2021-03-25

File Description Downloads
download icon MG5_aMC_v3.1.0.tar.gz (md5) MG5aMC_3.1.0 346
last downloaded 24 hours ago
Total downloads: 346

2.9.x (helicity-recycling) release from the 2.0 series released 2021-01-30

Release information
Release notes:

Large focus on the speed of the LO code
- faster method to evaluate the matrix-element (thanks to a new optimization layer)
- faster integration method for VBF processes

Changelog:

      Kiran+OM: Optimization of the matrix-element at run-time using recycling helicity method
                - This fasten LO computation by a factor around 2
                - This can be turned off via the command "output PATH --hel_recycling=False"
      OM: Various optimization fot T-channel integration
          - use different ordering for T-channel. Four different ordering have been implemented
            at generation time, the code decides which ordering to use channel-per-channel.
            This can be turned off via the command "output PATH --t_strategy=2"
          - increase number of maximum iteration for double or more T-channel
          - implement an alternative to the standard multi-channel.
             instead of using the amplitude square it use the product of the denominator
             (the default strategy use depends of the process)
          - speed-up for VBF type of process are often around 100 times faster
          - This fixes a lot of issue for processes failing to generate the targetted number of events.
      OM: Better version of the color-computation (but this leads to only modest gain but for very complex processes.\
)
          This optimizations leads to a longer generation time of the code (only for complex processes).
          This can be turned off via "output PATH --jamp_optim=False"
      OM: New parameter in the run_card:
          - sde_strategy: allows to change the default multi-channel strategy
          - a new phase-space optimization parameter are now easily availabe via the command "update ps_optim"
      OM: New global parameter "auto_convert_model"
          if set on True (set auto_convert_model T or via input/mg5_configuration.txt)
          all model crashing due to a python3 compatibility issue of the UFO model will be automatically converted
          to a python3 compatible model.

File Description Downloads
download icon MG5_aMC_v2.9.3.tar.gz (md5) MG5aMC_2.9.3 614
last downloaded 24 hours ago
Total downloads: 614

2.8.x (VBF and muon) release from the 2.0 series released 2020-08-21

Release information
Release notes:

      OM: pass to python3 by default
      OM: For LO process, you can now set lpp1 and lpp2 to "4" for process with initial photon in order to get the
          effective photon approximation. This mode behaves like the "3" one: The cut-off scale of the approximation
          is taken from the fixed renormalization factorisation scale: "dsqrt_q2fact1/dsqrt_q2fact2"
      OM: The width ao T-channel propagator are now set to zero automatically.
          To return to the previous behaviour , you can use the options "set zerowidth_tchannel False"
          (to set before the output command)
      OM: Change in madevent phase-space integrator for T-channel:
            - The integration of photon/Z/Higgs are now done together rather than separatly and follow importance
               samp...

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download icon MG5_aMC_v2.8.3.2.tar.gz (md5) MG5aMC_2.8.3.2 212
last downloaded 24 hours ago
Total downloads: 212

2.7.x (weakly polarized) release from the 2.0 series released 2020-01-21

Release information
Release notes:

2.7.1(09/03/20)
      OM: Fixing issue (wrong cross-section and differential cross-section) for
          polarised sample when
           1) you have identical polarised particles
           2) those particles are decays
          examples: p p > j j w+{0} w+{T}, w+ > e+ e-
      OM: In presence of identical particles, if you define the exact number of decays
          (either via the decay chain syntax or via MadSpin) then they are assigned in an ordered way:
          generate p p > z{0} z{T}, z > l+ l-, z > j j
          means that the Longitudinal Z decays to lepton (transverse to jet)
          Thanks to Jie Xiao for reporting such issues.
      OM: Effective Photon approximation is now always done with a fix cutoff. This use the FIXED factorization scale
          of the associat...

File Description Downloads
download icon MG5_aMC_v2.7.3.py3.tar.gz (md5) MG5aMC_2.7.3.py3 668
last downloaded 6 days ago
download icon MG5_aMC_v2.7.3.tar.gz (md5) MG5aMC_2.7.3 4,592
last downloaded 2 days ago
Total downloads: 5,260

2.6.x (weights, weights and weights) release from the 2.0 series released 2017-08-15

Release information
Release notes:

2.6.5 (03/02/19)
      OM: Fix some speed issue with the generated gridpack --speed issue introduced in 2.6.1--
      OM: Fix a bug in the computation of systematics when running with Python 2.6.
      OM: import model PATH, where PATH does not exists yet, will now connect to the online db
          if the model_name is present in the online db, then the model will be installed in the specified path.
      MZ: Applgrid+aMCFast was broken for some processes (since 2.6.0), due to wrong
          information written into initial_states_map.dat. This has been fixed now
      OM: change in the gridpack. It automatically runs the systematics.py (if configure in the run_card)
      OM: Fix a MLM crash occuring for p p > go go (0,1,2 j)
      OM: Fix issue for BSM model with additional colored...

File Description Downloads
download icon MG5_aMC_v2.6.7.tar.gz (md5) MG5aMC_2.6.7 7,276
last downloaded 24 hours ago
Total downloads: 7,276

2.5.x (Interface) release from the 2.0 series released 2016-09-08

Release information
Release notes:

2.5.5(25/05/17)
      OM: Fixing bug in the creation of the LO gridpack introduced in 2.4.3. Since 2.4.3 the generated
          gridpack were lacking to include the generated grid for each channel. This does not lead to
          bias but to a significant slow down of the associated gridpack.
      OM: Supporting user function calling other non default function.
      OM: adding the command "update to_slha1" and "update to_slha2" (still beta)
      RF: some cleanup in the NLO/Template files. Many unused subroutines deleted.
      OM: fixing some bug related to complex_mass_scheme
      OM: fixing bug in ALOHA for C++ output (in presence of form-factor)
      OM: fixing lhe event for 1 to N process such that the <init> block is consistently set for the shower
      OM: ExRootAnalysis in...

File Description Downloads
download icon MG5_aMC_v2.5.5.tar.gz (md5) MG5aMC_2.5.5 8,163
last downloaded 5 days ago
Total downloads: 8,163

2.4.x (reweighting) release from the 2.0 series released 2016-05-12

Release information
Release notes:

2.4.0 (12/06/16)
        OM: Allowing the proper NLO reweighting for NLO sample
        RF: For NLO processes allow for multiple PDF and scales reweighting, directy by inputting lists
            in the run_card.dat.
        VH: Interfaced MadLoop to Samurai and Ninja (the latter is now the default)
        HS: Turn IREGI to off by default
        MZ: new NLO generation mode. It is more efficient from the memory and CPU point of
            view, in particular for high-multiplicity processes.
            Many thanks to Josh Bendavid for his fundamental contribution for this.
            The mode can be enabled with
            > set low_mem_multicore_nlo_generation True
            before generating the process.
        OM: Adding the possibility to use new syntax for tree-level process...

File Description Downloads
download icon MG5_aMC_v2.4.3.tar.gz (md5) MG5_aMC_v2.4.3 8,209
last downloaded 3 days ago
Total downloads: 8,209

2.3.x (LoopInduced) release from the 2.0 series released 2015-07-01

Release information
Release notes:

- Automation of event generation for loop-induced processes

Changelog:

OM+VH: Automation of event generation for loop-induced processes.
OM: Automatic change of the p/j definition to include the b particle if the model has a massless b.
RF: Reduce the collision energy for the soft and collinear tests: for 100TeV collider many were failing
     due to numerical instabilities.
OM: Fixing bug associate to the epsilon_ijk structure
OM: Fix a crash in MadWidth which occurs for some 4 body decay
PT: Fixed a bug concerning the use of Herwig++ with LHAPDF. Bug was introduced in 2.3.0.beta
OM: Fix a crash in ALOHA for form-factor in presence of fermion flow violation

File Description Downloads
download icon MG5_aMC_v2.3.3.tar.gz (md5) MG5_aMC_v2.3.3 10,137
last downloaded 24 hours ago
Total downloads: 10,137

2.2.x (split and conquer) release from the 2.0 series released 2014-09-23

Release information
Release notes:

- General mixed order corrections in MadLoop (only), including QCD/EW/QED and the UFO@NLO model 'loop_qcd_qed_sm'.
- Re-design of both the tree and MadLoop matrix elements output to compute contributions of different coupling order combinations independently from one another.
- Tensor integral reduction as implemented in PJFry and IREGI readily available and interfaced to MadLoop's output
- AAPLGRID mode added arXiv:1406.7693

Changelog:

2.2.0(24/09/14) VH: General mixed order corrections in MadLoop (only), including QCD/EW/QED and
                    the UFO@NLO model 'loop_qcd_qed_sm'.
                VH: Re-design of both the tree and MadLoop matrix elements output to compute
                    contributions of different coupling order combinations independently from one another.
                VH+HS: Tensor integral reduction as implemented in PJFry and IREGI readily available
                    and interfaced to MadLoop's output.
                VH: Re-structuring of MadLoop's standalone output so as to easily create a single dynamic
                    library including many processes at once. Useful for interfacing MadLoop to other MC's
                    and already working with Sherpa.
                VH+HS: This branch contains all the fixes for proper treatment of the latest BSM@NLO models
                    produced by FeynRules@NLO. In particular, the fixed related to the presence of majorana
                    particles in loop ME's.
                RF: Corrected the behaviour of the pdfcode parameter in the shower_card for NLO+PS runs.
                PT: Redesigned shower_card.dat and eliminated modbos options for Herwig6
                RF: Change the SPINUP information in the NLO LHEF from 0 to 9 (i.e. sum over helicities)
                RF: Fixed a bug in the check on the determination of the conflicting BWs.
                RF: Added the aMCfast+APPLgrid interface (arXiv:1406.7693 [hep-ph])
                PT: Redesigned shower_card.dat and eliminated modbos options for Herwig6
                RF: Change the SPINUP information in the NLO LHEF from 0 to 9 (i.e. sum over helicities)
                RF: Fixed a bug in the check on the determination of the conflicting BWs.
                MZ: enabled LHAPDF6 interface
                OM: Fixed a crash in some HEFT merging case.
                OM: Fix various compatibility problem created by the LHEFv3 version (Thanks to S. Brochet)
                OM: Fix a bug for MadSpin in gridpack mode
                OM: Add a routine to check the validity of LHE file (check_event command)
                OM: Fix bug for UFO model with custom propagators
                OM: Fix Bug in the computation of cross-section in presence of negative contribution
                OM: Change colorflow information of LHE file in presence of two epsilon_ijk
                    since PY8 was not able to handle such flow in that format.
                OM: Add the function print_result for aMC@(n)LO run.
                OM: Add some shortcut in the card edition
                    set ebeam 500 # edit both beams
                    set lpp 0 # edit both lpp1 and lpp2
                    set lhc 14 # configure for LHC 14TeV
                    set ilc 1000 # configure for ilc 1TeV
                    set fixed_scale 100 # set all scale to fixed and at 100GeV
                    set showerkt T # set showerkt on T in the shower card
                    set qcut 20 # set the qctu to 20 in the shower card
                OM: Fix a bug in the card edition mode which was sometimes returning to default value
                    which were edited by hand and not via the set command.
                Seoyoung Kim (by OM): Implementation of the htcaas (super-)cluster support.
                Juan Rojo (by RF): extended the 3 internal NNPDF sets for scales relevant for a 100TeV collider.
                OM: Fix a problem with the creation of DJR plot with root 6
                OM: allow the set the width to Auto in NLO computation (width computated at LO accuracy)
                OM: Adding the possibility to have automatic plot after the parton shower for Herwig6/Pythia6.
                    This require MadAnalysis and the pythia-pgs package.

File Description Downloads
download icon MG5_aMC_v2.2.3.tar.gz (md5) MG5_aMC_v2.2.3 6,095
last downloaded 24 hours ago
Total downloads: 6,095

2.1.x (MadWeight) release from the 2.0 series released 2014-02-21

Release information
Release notes:

               MADWEIGHT RELEASE:
                ------------------

                OM+PA: First Official release of MadWeight inside MG5_aMC
                      Main update:
                        - ISR corrections
                        - possibility to use narrow-width approximation
                        - introducing a module for the pre-selection of the parton-jet assignment.
                        - extended formalism for the transfer function (more generic)
                        - possibility to evaluate the weights for multiple choices of transfer function
                          on the same phase-space point. The phase-space is optimized for the first set of
                          parameters.
                      Speed update:
                        - More eff...

File Description Downloads
download icon MG5_aMC_v2.1.2.tar.gz (md5) MG5_aMC_v2.1.2 2,360
last downloaded 12 days ago
Total downloads: 2,360

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