MadGraph5_aMC@NLO 2.9.x "helicity-recycling"

This will include helicity-recycling (which will speed-up heavy QCD processes by a factor around 2x) and better phase-space integration for VBF processes
(up to 30,000 times faster quite often around 100 times faster)

All those optimisations are for LO only.

Milestone information

Project:
MadGraph5_aMC@NLO
Series:
lts
Version:
2.9.x
Code name:
helicity-recycling
Released:
 
Registrant:
Olivier Mattelaer
Release registered:
Active:
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File Description Downloads
download icon MG5_aMC_v2.9.19.tar.gz (md5) MG5aMC_LTS_2.9.19 85
last downloaded 24 hours ago
download icon MG5_aMC_v2.9.18.tar.gz (md5) MG5aMC_LTS_2.9.18 964
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download icon MG5_aMC_v2.9.17.tar.gz (md5) MG5aMC_LTS_2.9.17 290
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download icon MG5_aMC_v2.9.16.tar.gz (md5) MG5aMC_LTS_2.9.16 925
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download icon MG5_aMC_v2.9.15.tar.gz (md5) MG5aMC_LTS_2.9.15 46
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download icon MG5_aMC_v2.9.14.tar.gz (md5) MG5aMC_LTS_2.9.14 96
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download icon MG5_aMC_v2.9.13.tar.gz (md5) MG5aMC_LTS_2.9.13 264
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download icon MG5_aMC_v2.9.12.tar.gz (md5) MG5aMC_LTS_2.9.12 196
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download icon MG5_aMC_v2.9.10.tar.gz (md5) MG5aMC_LTS_2.9.10 75
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download icon MG5_aMC_v2.9.11.tar.gz (md5) MG5aMC_LTS_2.9.11 280
last downloaded 9 days ago
download icon MG5_aMC_v2.9.9.tar.gz (md5) MG5aMC_LTS_2.9.9 930
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download icon MG5_aMC_v2.9.7.tar.gz (md5) MG5aMC_LTS_2.9.7 411
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download icon MG5_aMC_v2.9.6.tar.gz (md5) MG5aMC_LTS_2.9.6 122
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download icon MG5_aMC_v2.9.5.tar.gz (md5) MG5aMC_LTS_2.9.5 1,196
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download icon MG5_aMC_v2.9.4.tar.gz (md5) MG5aMC_2.9.4 3,044
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download icon MG5_aMC_v2.9.3.tar.gz (md5) MG5aMC_2.9.3 2,440
last downloaded 6 days ago
Total downloads: 11,364

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 

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      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.

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