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UpdateNotes.txt
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Update notes for MadGraph5_aMC@NLO (in reverse time order)
ANNOUNCEMENT:
2.9.X version has a LONG TERM STABLE has now an end of life for bug fixing/support in december 2025.
A new LTS (based on current 3.5.X) is starting now and will act as stable release for the coming years.
3.6.1 (29/11/24):
OM+MZ: Fix a bug for lhapdf at NLO where the code was incorectly changed like the LO version (and was crashing at compilation)
OM: Fixing various compilation issue at LO
ALL: Include fix from LTS 3.5.7 and 2.9.22
- including some rare but serious bug in scan
- including support for python 3.13 (but for f2py related feature)
3.6.0 (30/09/24):
PT+RF: fixed the Pythia8 script so that SCALUP in the LHE file is ignored only when using FxFx or MC@NLO-Delta
OM: Allow the scan command within the run_card.
Note that such command can NOT be used if the scan command is used in the param_card.
so the following command is now working:
set ebeam scan1:[6500,7000]
Thanks to Kentarou Mawatari for pushing me to implement this.
DP+TV+MZ: Implementation of EW Sudakov corrections. See 2110.03714 and 2309.00452
AV+SR+SH+ZW+DM+OM: Implementation of the support for batch of events at LO.
This will allow to support the cudacpp plugin that will offer
- GPU support for LO processes
- SIMD support on cpu
Those modes need to install the cudacpp plugin (can be done via the command "install cudacpp")
This feature also add OpenMP support for LO process (deactivated by default and which does not need the plugin).
3.5.7 (29/11/24)
OM: Include fix from LTS 2.9.22
3.5.6 (26/9/24):
OM: Include fix from LTS 2.9.21
OM: fixing gridpack with large number of events (issue with the new strategy of combining events)
3.5.5 (17/06/24):
OM: Fix a bug in the new strategy of combining events.
OM: Allow slurm/condor cluster to specify the wall time of the jobs (cluster_walltime)
OM: add new (hidden) entry in the run_card to force to keep all the log file (keep_log)
OM: Fixing a matchbox issue (introduced in 2.9.0)
OM: Dynamical scale choice for NLO can now be set via custom_fcts (was bugged before)
OM: INclude fix from (other) LTS 2.9.20
3.5.4 (05/04/23):
MZ+RF: Bug fixes:
1) a bug related to event-generation, when virtual corrections include more than one
coupling combination (so NLO QCD to SM processes were **not** affected), in particular
when the coupling combinations have different sign. The contribution
from the virtual amplitude was wrongly accounted for, resulting in unphysical distributions.
Thanks to Haoquan Ren for reporting it.
2) a bug related to NLO EW corrections at lepton colliders, for initial-state FKS configuration.
Phase-space points for which the real-emission momentum generation was failing but the Born one
was passing were thrown away altogether.
Thanks to Riccardo Lubello for leading to the identification of the bug.
OM: Change the way restriction model work to be more agressive in the data structure.
This was trigger by the fact that the virtual was consider different if some unused lorentz structure
was left in the model/interaction. This allow to get back to the behaviour of the LTS version in term
of number of directories for QCD processes and therefore gain disk area and speed-up the code.
OM: Change in the unweighting strategy for process with a large number of channel (>80).
If you have deactivated the limit of number of open file (via the ulimit command) then the unweighting will be
done in a single step in one core (typically the most efficient strategy).
If not possible, then the unweighting will be done by packet of 80 channel in a multi-core way.
Then those packet will be merged together in a second step (single core).
In this second case the algorithm has also been made more agressive.
Speed-up of factor 20 have been observed in some extreme cases.
Thanks to Mark Goodsell and Stephan Hageboeck, for pushing me on this and for your help.
OM: Python3.12 status:
- many (python) warning are raised when running with python3.12. Work is in progress (and will be very long) to
remove all those warnings.
- f2py (needed for reweighting/madspin) is quite impacted the drop of disutils and typically fails to compile
with the meson backend. numpy version 2.x (not yet release) will be minimum for reweighting/madspin.
OM: Allow (back) LHE output in fixed-order format (thanks Gauthier)
OM: Change the internal representation of fixed_order card, that allow to use the set command to edit the card.
like for the param_card/run_card/...
OM: relax polarization restriction at NLO for massless particles.
SJ+OM: fix some issue with non saving correctly where fastjet was installed when installing it via MG5aMC install command
SJ: Fixing rivet running due to some library not correctly linked
OM: Include bug fix from 2.9.19
3.6.0:
OM: Stop support for model in the legacy v4 format
3.5.3 (22/12/23)
OM: Include Bug fix from 2.9.18
OM: Update inner representation of the shower_card allowing to support any py8 parameter
3.5.2 (08/11/23)
MZ: fixing issue for 2>1 processes at NLO accuracy (like p p > Z [QCD])
For most compiler, the process was just crashing but some compiler were returning absurdly large cross-section
RF: update test at NLO to better include phase-space cut
OM: Change restriction model to be less sensitive to numerical accuracy
OM: bug fixing from LTS up to 2.9.17 (see below)
PT: added options for matrix-element corrections in shower card fot PY8
3.5.1 (11/07/23)
SH+OM: Update interface for contur
OM: fix an issue with NLO reweighting introduced in 3.4.0 where loop scale was not correctly set anymore
OM: Better determination of zero helicity for helicity recycling part of the code
OM: Fix issue for powheg output
OM: bug fixing from LTS up to 2.9.16 (see below)
3.5.0 (12/05/23)
VB+MC+SF+GS+MZ+XZ: NLO EW implemented for lepton-lepton collisions with ISR and beamstrahlung
See 2207.03265 and the FAQ https://answers.launchpad.net/mg5amcnlo/+faq/3324 for details.
NNL-accurate parton distributions for lepton collisions are provied by eMELA
https://github.com/gstagnit/eMELA/releases
SF+MZ+PT+PY8author: Introduction of MCatNLO-Delta, a new matching procedure allowing to have less
negative events generated (see 2002.12716)
OM: MadSpin has now a syntax for handling semi-leptonic decay
not supported in spinmode=onshel/none
OM: possibility to install eMELA (install eMELA)
HS: Adding support of UPC
Bruno-Miguel-Oliveira: conform with the XDG Base Directory Specification for history/config file:
https://github.com/mg5amcnlo/mg5amcnlo/pull/45
OM: bug fixing from LTS up to 2.9.15 (see below)
3.4.2 (20/01/22)
ALL: fixing bugs related to 2.9.13 (Long Term Stable: see below)
OM: fix issue with hepmcremove (thanks to franaln)
OM: fix some issue with addmodel
OM: fix issue with the update of the param_card to set the used value for alphas
OM: fix issue with wrong env variable for pythia8data (thanks pavel)
3.4.1 (01/09/22)
MZ+CS: PineAPPL now supports user-defined bias_wgt_functions.
RF: removed a write statement in the reweighting routine (to get scale and PDF uncertainties at NLO+PS runs) that cluttered the reweight_xsec_events.output log files.
OM: Fixing an issue with lhapdf when trying to use an pdf set not yet installed within the database
All: in sync with bug fixing in LTS (version 2.9.12)
3.4.0 (06/05/22)
SJ: Allowing to use RIVET/CONTUR from madgraph. In presence of scan, such running can also be done
at the end of the scan. (Contribution from Sihyun Jeon)
OM: Allow to have EFT operator to run for some special UFO model (quite restricted class of running are supported
-- corresponding to EFT running --)
OM: change reweighting/spinmode=onshell (from maddspin) to use the average of the matrix-element when it exists an order ambiguity in the matrix element like for the following process:
p p > e+ ... z, z > e+ e-
where permuting the momenta of the "e+" does not lead to the same
matrix-element.
CF: include notification when jobs are done in the unix notification center if executable notify-send is present.
Contribution from Carlo Flore.
All: Droping the support for python2.7
All: include bug fix from Long Term Stable version (2.9.10) see below
3.3.2(18/03/22)
OM: (re)allow --loop_filter=True/... syntax for MC@NLO
RF: Fixed a bug in the phase-space generation of MadSpin,
relevant for processes with more than 1 t-channel.
MZ: Restored functionalities for processes with external photons and
only QCD corrections
all: include all bug fix from the LTS version (2.9.9)
including important bug on MLM generation
3.3.1 (04/12/21)
RF: Fix for bug #1928364 related to the new FxFx clustering routines.
OM: Fix for bug #1952050 systematics/reweighting run at NLO that was broken
introduced in 3.3.0
OM: Fix bug related to python 3.10
OM: Fix bug when running from the process directory
all: include all bug fix from the LTS version (2.9.7)
including important bug on MC@NLO and on madspin
3.3.0 (12/11/21)
DP+HS+IT+MZ: EW corrections can be computed for tagged photons
OM+RR+AC: Implementation of EWA within MG5aMC (PDF for W/Z boson out of lepton beam)
MZ+CS: A fix in amcatnlo_run_interface to prevent integer overflows when a
very high precision is requested.
MZ+CS: Fixes/improvements relevant to PineAPPL:
- the function pineappl_grid_optimize is called by pineappl_interface,
to reduce the size of the grids. PineAPPL v0.5 or later is required
- minor fix on the gluon pdg code in pineappl_interface.cc
- the integration channels are threated the same way with or without PineAPPL
(maxchannels is kept the same in both cases)
RF: Fix for montecarlocounter in case the Born is not strictly positive
(i.e., only interference contributions).
RF+IT: Rewritten the clustering code for FxFx. This allows for
seperation of QCD and EW jets. Needs special JetMatching.h for
Pythia8 (can be found in Template/NLO/MCatNLO/Scripts/JetMatching.h)
OM: adding a new cut dsqrt_shat to set a minimum center of mass energy cut
OM: allow the support of latest LUX PDF with lepton content of the proton
Note that running PY8 is automatically forbidden in that case.
ALL: include bug fixing from Long Term Stable version version (2.9.6) see below
OM+RR: better handling of multiparticles with both photon and massive vector when
the user ask for longitudinal polarization. longitudinal photon are automaticlly
discarded. (This overwrite LTS fix that was simply making the code to crash)
OM: Fixing a bug introduced in 3.1.0, with the automatic setup of FxFx
was broken.
OM: Code update to avoid randomness in ordering in code generation (only in debug mode)
3.2.0 (22/08/21)
SF/OM/MZ/XZ: Implementation (at LO) of ISR and beamstrhalung for e+e- collider
BUG FIX (from 2.9.5 long term stable, see below)
OM: Fix an infinite loop when running with condor cluster
or with other cluster/multi-core when cluster_temp_path
was used.
3.1.1 (28/05/21)
ALL: put a crash for potentially ambiguous syntax with explanation
on how to bypass such crash via a new entry in
input/mg5_configuration.txt
BUG FIX (from 2.9.4 long term stable)
3.1.0 (30/03/21)
ALL: include all changes up to 2.9.3 of the 2.x release
ALL: pass to python3 by default
MZ+RF+OM: Fix relevant to the case when PDG specific cuts are set in the NLO run_card.
The generation of tau was not taking into account the information.
DP+HS+MZ: Allow for the computation of NLO EW and complete NLO corrections in the 4FS
MZ+SC+ERN+CS: The code can be linked to PineAPPL (arXiv:2008.12789), making it possible
to generate PDF-independent fast-interploation grids including EW corrections.
This supersedes the interface to ApplGrid+aMCFast which was not working in v3
MZ: Change syntax meaning in 3.0 series to be consistent with the one of 2.0 series:
QCD<=X, QED<=Y apply at the amplitude level (not to the squared amplitude anymore).
Squared-amplitude constraints can be imposed by using the usual squared-order
syntax, e.g.:
QCD^2<=X, QED^2<=Y (constrained at the diagram squared level).
MZ: Different coupling combinations and their scale variations are written in the
event file as extra weights
OM: Some aliases have been added for the orders constraints:
- aEW<=X / aS<=Y is equivalent to QCD^2<=2X / QED^2<=2Y
- EW<=X / EW^2<=X is equivalent to QED<=X / QED^2<=X
** Long Term Stable Update **
2.9.22 (29/11/24):
OM: Fix a (NLO) issue if the environment variable was setting FFLAGS
OM: set auto_update X, now automatically set the configuration file (as it should).
OM: Fix a bug in helicity recycling with scan for rare case where a matrix element is first correct, then zero, then has a single helicity.
In that third case, the code was not recompiled correctly and was picking the wrong amplitude.
Thanks to Matteo Maltoni for finding such bug
OM: Starting support for python3.13, as for python3.12 functionallity like reweighting will not work with 2.9.x LTS branch.
2.9.21 (26/9/24):
OM: Adding support for GCC14 (thanks to joequant)
OM: Fixing a rare issue within aloha where some generated code was not compiling
OM: Fix issue with Pythia8 when running in run_mode=0
OM: Fixing gnuplot related issue (when pythia8 was running)
OM: Avoid numerical inacuracy issue when the user were requested boost to the center of mass frame for non lorentz invariant amplitude
OM: Avoid to use sde=2 by default for more processes (like Drell-Yan)
2.9.20 (17/6/24):
OM: Fix a wrong syntax handling for decay chain like
generate ... > A A B , B > , A > , A >
where due to the different order in production (AAB) and in decay (BAA)
all A particle where decay with both decay mode, instead of their specific ones.
(present since v1.0.0)
Note this bug can still be present if A or B are multi-particles, in that case we advise to use
the same order for the production and decay syntax.
OM: Fix an issue with helicity recycling if some processes did not have available phase-space.
In some situation, the cross-section was reported as simply zero even if other processes where
kinematically allowed (thanks Sihyun Jeon)
OM: Improving the detection of cache invalidity for UFO model (thanks A. Valassi)
OM: Fix compilation of Stdhep on some unix machine (thanks jmcarcell)
OM: Fix an issue with the weight normalization when running PY8@LO
2.9.19 (20/03/24):
OM: Fix a "cot" issue introduced in 2.9.18.
OM: Fixing some regular expression for the way fortran writter works.
The bugged expression was not spotted as problematic for the LTS version.
OM: Fix some compiler issue with modern compiler for rambo (standalone mode)
OM: Fix one rare bug for helicity recycling (case without propagator)
2.9.18 (08/12/23):
OM: Fix a bug for processes extremelly close to threshold, where the
the initial grid for some angle was wrongly biased towards \tetha=\pi.
In extreme case, the determination of the non-zero helicity was starting to
remove helicity proportional to (1+\cos\theta) since theta was so close to \pi.
While the grid bias was corrected after the first iteration, the accidental removal of helicity
could lead to a bias in the cross-section. One way to detect if you are impacted by such bug is to
run 5 times with different seed, if the cross-section fluctuates between two values then you are
impacted by such issue.
OM: Implement better handling of the phase-space when you have a S-channel breit-wigner but that cut prevent
such resonance to be onshell. (Thanks Sihyun Jeon)
OM: Implement better handling of the MMNL cut if the process has exactly two leptons (including neutrino).
This improves the phase-space integrator when MMNL is used for putting invariant mass cut on single W production
OM: Change the support of the function "cot" within ufo model to have it consistent with UFO convntion.
It might potentially impact old UFO model, please contact us if this is the case
OM: Fix a critical bug when exporting code with two different model where the second model was not correctly imported
(likely a python3 only bug)
OM: Fixing issue when using cluster_tmp_dir in multicore mode
OM: add a warning concerning the status with python3.12
2.9.17(19/10/23):
OM: change integration strategy (SDE=1) for width computation
OM: clearer error message in some situation
2.9.16(26/07/23):
OM: fix for helicity recycling
OM: Update numpy support to latest version
OM: Fix some interface issue
2.9.15 (12/05/23)
OM: Fix a bug where the number of core sed was higher than requested
OM: Reduce RAM used by madspin
OM: Fix a rare issue with helicity recycling leading to incorect format in the generated code (and crash)
OM: Fix issue with param_card parsing for some block not related to the model
OM: Fix compilation error for stdhep
OM: Fix one issue for sextet model/process
2.9.14 (17/02/2023)
OM: Fix some "output aloha" command, where some routine where not defined
OM: Fix a crash in the multicore mode when 0 job was needed. (introduced in 2.9.13)
2.9.13 (01/12/2022)
OM: Fixing display diagrams on MacOS Catalina
OM: fixing issue within reweighting module where runname was not respected during scan
OM: remove unused thread which should allow large scan
OM: fix a compilation issue of IREGI
OM: fix auto-download of pdf
OM: fix systematics.py which was not called with the most appropriate default for matching/merging generation (MLM)
2.9.12 (09/08/2022)
OM: Fixing issue with model (like SMEFTatNLO) where some interactions where using more than 9 coupling
The coupling where assigned to the wrong lorentz structure
OM: Fixing another issue for BSM model where an interaction is associated
to many coupling (detected for 10 coupling) where helicity recycling
was discarding incorectly such type of interaction.
OM: Fixing an helicity recycling issue if during a benchmark scan a full
matrix-element did not had any contribution (all amplitude set to zero)
but not in the following one. Those two runs were fine but any
following points in the scan will automatically discard that
matrix-element.
2.9.11 (03/06/22)
OM: Fixing a bug on the color assignment for b-quark (that's leading to a crash of herwig)
This occur in five flavor model, if you do not force yourself the definition of the
multi-particle "j" and "b". This bug was present since 2.3.1 (where the flipping of such
multi-particle to 4/5 flavor was done automatically for the first time)
2.9.10 (06/05/2022)
OM: allow model with GC in their name to use helicity recycling
OM: Forbid madspin to run with crazy value of BWcut
OM: Fixing some IO issue with Madspin that was leading to a lock of the code
OM: set a user interface for the set ewscheme option
OM: forbid helicity recycling for model with spin2 and spin3/2 (optimization is not implemented for such case)
2.9.9 (25/02/2022)
OM: Fix a bug introduced in 2.9.0 for MLM generation in presence of mix EW/QCD process.
The bug typically leads to a crash within the systematics.py due to wrong power of alpha_s
The bug might sometimes not lead to a crash but the impact is "limited" to a change in the (various)
scale choice associated to the events. Therefore this is likely to be within scale uncertainty. It can
impact the matching with the parton-shower (but this should be visible within the DJR validation plot).
OM: Fix some wrong zero-result that occur in presence of conflincting breit-wigner.
OM: Fix an issue when using "$ X" when X~ can be onshell, the phase-space symmetry factor was wrongly set.
2.9.8 (21/02/2022)
OM: Fix in madspin where onlyhelicity mode was not working anymore
also allows to not specify any decay in that mode.
OM: Fix in multi_run mode where some meta-data where incorrectly set within the merged lhef file.
This occurs ONLY in presence of non positive definite cross-section.
Only normalization of the cross-section/weight/statistical error could be wrong. Shape are not impacted.
2.9.7 (29/11/21)
OM: Fix the behavior of python seed for madevent/madwidth/mcatnlo/madspin
Now the first of those to setup a python seed will forbid any future reset of the seed
Frequent reset of the seed when moving to one package to the next was creating
a bias in the effective branching ratio out of madspin (observed only of NLO sample)
see: https://bugs.launchpad.net/mg5amcnlo/+bug/1951120
Thanks Hannes for the information.
RF+PT+SF: Fixed a 10-year-old bug that was there in the importance sampling over the FKS configurations.
- Fix to pick one shower scale for the S event at random among the FKS configurations,
instead of taking the weighted average.
- removed the n-body contributions from the random picking of the showerscale among FKS configurations.
Those bugs were leading at an incorect pick of the shower scale. The observed impact is relatively small
and occur in the matching region.
2.9.6 (02/11/21)
OM: Forbid the possibity to ask for massless boson to be longitudinally polarised.
Asking for those with large multi-particle label could have hide the fact that the code
was returning a non zero cross-section for such request.
OM: for process like p p > w+{X} w+{Y}, w+ > l+ vl
i.e. process with polarization of identical particle where the decay involves multi-particles and
where the lepton does not all have the same mass, some of the process were incorrectly discarded.
OM: fix an issue for photon initial state with lpp=+-4 where the lhef output was not setting the muon
as the correct colliding particles (thanks to Yuunjia Bao)
OM: Fixing an issue that madspin was not always using the python executable that was used by the
mg5_aMC executable
OM+PT: Change the shower script running pythia8 in order to be working with pythia8.3.
Running with Pythia8.2 (or lower) is then not possible anymore.
OM: Fix issue that some loop-induced processes were not working anymore since 2.9.0
OM: Fix the default set of cut present in the default run_card if gluon were present in the final state but no
light (or b) quark. The absence of those cuts, in that situation, were leading to hardcoded cut that was
not easy to overwrite by non expert user.
2.9.5 (22/08/21)
OM+LM: [LO only] Fix the factorization scale dependence for lpp=2/3/4.
This was claimed to be using fixed scale computation while
in some case the scale was dynamical
To have full flexibility we introduced two additional
(hidden) parameter: "fixed_fac_scale1" and "fixed_fac_scale2"
that allow to choose fixed scale for only one beam.
OM: fix auto-width that was not following run_mode specification
OM: fixing missing rwgt_info for reweighting with gridpack mode
OM: fixing 'check' command with the skip_event mode
OM: fixing auto-width computation for 3 body decay and identical particle which was sometimes leading to crash
OM: Fix some potential infinite loop when running with python3
2.9.4(30/05/21)
OM: Fix a python3 issue for madSpin when using in a gridpack mode (set ms_dir)
OM: Fix an issue for non positive definite matrix-element when using the
"set group_subprocesses False" mode of MG5aMc
OM: Fix a speed issue for gridpack in readonly mode where the grid were recomputed
** PARRALEL VERSION FOR EW branch **
3.0.3 (06/07/20)
include up to 2.7.3
3.0.2
include up to 2.7.2
MZ: better handling of zeros in color-linked borns
RF: improved the behaviour for integration channels that give zero cross section
RF: Rewritten the mint integrator package. Makes for easier extensions.
RF: Fixed a problem related to the multi-channel enhancement factor for
NLO runs that only appeared in BSM theories (or EFTs)
RF: In the virt-tricks, replaced the grids for the virtuals with a
polynomial fit, which is more precise and allows for a reduction of
the number of calls to the virtual. However, requires to save all the
phase-space points for which the virtual has been computed to disk,
hence requires more disk space and memory for highly-accurate
runs. Can be disabled in the FKS_params.dat card, if disk space
and/or memory use needs to be limited.
3.0.1
include up to 2.6.4
MZ: Enable shower for QCD-only splittings
RF: Fixed a major bug in the code that affected 3.0.0 that affected processes with
cuts and --to a lesser extend-- processes with massive final state particles:
the phase-space region where "xi_i_fks != xinorm*xi_i_hat" had the wrong "prefact".
3.0.0 (01/05/18):
RF+SF+VH+DP+HS+MZ: Allow for the computation of NLO EW corrections (and more subleading NLO corrections).
[Note: when requiring NLO corrections ([QCD], [QED] or [QCD QED]), internally the code always treats this [QCD QED],
and then uses the coupling orders to specify which contributions should be considered. Among other things, this means
that when doing QCD corrections only --contrary to previous versions-- also loop diagrams with non-QCD-charged
particles will be included (e.g., the pentagons in Higgs production via vector-boson fusion).]
HS: inclusion of SMWidth for fast evaluation of NLO accurate widths for all SM particles
RF+SF: Resonance-aware phase-space mapping for NLO computations
RF: Reduction of the number of jobs -- results in earlier detection of small integration channels for fNLO
OM: remove ./bin/mg5 executable
** Main Branch (version 2.x) Update **
2.9.3(25/03/21)
OM: Fix an issue with t-channel particles for massive initial state where sqrt(S)
was close to the mass of the initial mass. boundary condition on t-channnel were
incorrectly setup leading to strange spectrum in various distribution (very old bug)
OM: Fix an issue with a crash for loop computation
OM: more python3 fixing bug
OM: Fix a bug in the re-writting of the run_card when seed was specify leading to a wrong templating
OM: various small fix of crash/better logging/debug information
2.9.2(14/02/21)
MZ+RF+OM: Fix relevant to the case when PDG specific cuts are set in the NLO run_card.
The generation of tau was not taking into account the information.
OM: fix an issue when running with python3 where the normalization of pythia8 file were wrong
when pythia8 was run in parralel.
OM: fixing more issue related to MSSM (introduced within 2.9.0)
OM: fixing issue with loop-induced processus (introduced within 2.9.0)
OM: Fix some wrong scale variation at NLO+PS (introduced in 2.9.0)
OM: Fix an issue with the installation of pythia-pgs
2.9.1.2 (02/02/21)
Kiran+OM: Fixing issue for the MSSM model
OM: Fixing issue with mac support
OM: fix a bug introduced within 2.8.2 related to a wrong phase-space mapping of conflicting resonances.
Leading to zero cross-section and/or potential bias cross-section for more complex cases.
The issue occurs only if you have a conflicting resonances followed by a massless propopagator.
one example is generate p p > z h , z > e+ e-, h > b b~ a
2.9.0 (30/01/21) **** Major speed-up update for LO computation ***
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.
2.8.3 (26/01/21):
OM: Buch of bunch fixing related to python3 issue (mainly related to unicode encoding)
OM: Various fix for reweighting with loop (mainly with python3 as well)
OM: Fix a potential bug for polarized sample with at least three polarised particles with a least two
identical particles and one different polarised particle.
OM: Fix various bug for maddm interface (thanks Daniele)
OM: Fix various issue with overall order usage
OM: Fix compatibility with MacOS 11
OM: fix additional GCC10 compatibility issue
OM: fix issue for 1>n process where width were set to zero automatically (introduced in 2.8.0)
OM: fix aloha output mode for python output
OM: avoid a bug with helicity filtering that was kept for all benchmark when using
multiple successive re-weighting
OM: Edition of the reweighting card via "set" command is not starting from the original param_card
used to generated the events file and not from the model default anymore.
OM: Interference have now their default dynamical scale set to HT/2
2.8.2 (30/10/20):
OM: Fix a bug when setting width to zero where they were actually set to 1e-6 times the width
This can lead to bias in the cross-section if your process is very sensitive to the cross-section
due to gauge cancelation. Bug introduced in version 2.6.4.
OM: Hide Block parameter loop from NLO model but for madloop run.
The factorization scale is still determine by the setup of the run_card as before
OM: Fix couple of python3 specific bug
2.8.1(24/09/20):
OM: Change user interface related to FxFx mode
- If you have multiple multiplicities at NLO,
- the default run_card is modified accordingly
- has icckw=3 and follow the official FxFx recomendation (i.e. for
scale and jet algo)
- the shower card has two parameter that are dynamically set
- njmax (default: -1) is automatically set depending of the process definition
- Qcut (default: -1) is now automatically set to twice ptj parameter
- the default parton-shower is automatically set to Pythia8
- The value of the cross-section after FxFx formalism (removing double counting) is
now printed on the log and available on the HTML page
OM: Fix for the auto width for three body decay in presence of identical particles.
OM: add support for __header__ in UFO model
OM: allow restriction card to have auto-width
OM: fixing some html link (removed ajax link forbidden by major web browser)
OM: Various fix related to the python3 support
- including more efficient model conversion method
2.8.0 (21/08/20):
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
sampling of the photon channel
- A new option "set max_t_for_channel X" allows to veto some channel of integration with more than X
t-channel propagator. This options can speed-up significantly the computation in VBF process.
(We advise to set X to 2 in those cases)
- Fix a numerical issue occuring for low invariant mass in T-channel creating spurious configuration.
OM: In madspin_card you can now replace the line "launch"
by "launch -n NAME", this will allow to specify the name of the
directory in EVENTS where that run is stored.
OM: Change in the python interface of the standalone output. In top of the pdg of the particles,
you can now use the process_id (the one specified with @X) to distinguish process with the same particle
content. This parameter can be set to -1 and the function then ignore that parameter.
OM: Adding new option in reweighting to allow the user to use the process_id in presence of ambiguous
initial/final state.
OM: Update the makefile of standalone interface to python to be able to compile in multicore.
(thanks Matthias Komm)
OM: Update of the auto-width code to support UFO form-factors
OM: Fixing numerical issue with the boost in EPA mode.
** PARRALEL VERSION FOR PYTHON 3 **
2.7.3.py3(28/06/20):
ALL: Contains all feature of 2.7.3 (see below)
OM: Fix a crash when running PY8 in matched/merged mode (bug not present in not .py3 version of the code)
MZ: low_mem_multicore_nlo_generation is working again
but not for LOonly mode and not in OLP mode
2.7.2.py3(25/03/20):
ALL: Contains all feature of 2.7.2 (see below)
2.7.1.py3(09/03/20):
ALL: Contains all feature of 2.7.1 (see below)
OM: Fixed a lot of python3 compatibility issue raised by user
Particular Thanks to Congqio Li (CMS), Richard Ruiz and Leif Gellersen
for their reports.
2.7.0.py3 (27/02/20):
ALL: Contains all feature of 2.7.0
OM: Support for python3.7 in top of python 2.7
- python2.6 is not supported anymore
- this requires the module "six" [pip install six --user]
OM: dropping function set low_mem_multicore_nlo
OM: dropping support for syscalc (c++ version)
OM: introduction of new setup variable
- f2py_compiler_py2 and f2py_compiler_py3
which will be used to overwrite f2py_compiler when using the associate python version
- lhapdf_py2 and lhapdf_py3
same for lhapdf
OM: introduction of a new command "convert model FULLPATH"
- try to convert a UFO model compatible to python2 only to a new model compatible both with
Python2 and Python3 (no guarantee)
** Main Branch Update **
2.7.3(21/06/20)
OM: Fixing some bug for read-only LO gridpacks (wrong cross-section and shape when generating events).
Thanks to Congqiao Li for this
OM: Allowing loop-induced process to run on LO gridpack with read-only mode.
Thanks to Congqiao Li for this
OM: Fix a bug in the longitudinal polarization for off-shell effect, leading to deviation at large invariant mass.
OM: Adding more option to the run_card for fine tuning phase-space integration steps
All are hidden by default:
- hard_survey [default=1]: request for more points in survey (and subsequent refine)
- second_refine_treshold [default=1.5]: forbid second refine if cross section after first refine is
is smaller than cross-section of the survey times such treshold
OM: new command for the editions of the cards:
- set nodecay: remove all decay line from the madspin_card
- set BLOCKNAME all VALUE: set all entry of the param_card "BLOCKNAME" to VALUE
- edit CARDNAME --comment_line='<regular_expression>' : new syntax to comment all lines of a card
that are matching a given regular expression
OM: For Mac only, when running in script mode, MG5aMC will now prevent the computer to go to idle sleep.
You can prevent this by running with the '-s' option. like ./bin/mg5_aMC -s PATH_TO_CMD
2.7.2(17/03/20)
OM: Fix a Bug in pythia8 running on Ubuntu 18.04.4 machine
OM: Speed up standalone_cpp code by changing compilation flag
2.7.1.2(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 associate beam as the cutoff of the Improved Weizsaecker-Williams.
OM: Allow to install lhapdf6.2 by default
OM: Fixing website used to download pdf since lhapdf removed their previous hepforge page for pdf set.
OM: Fixed a bug (leading to a crash) introduced in 2.6.6 related to the ckkw/MLM check for BSM model
with gluon with non QCD interaction
OM: For fortran standalone with python binding, this is not necessary anymore to run the code from a specific directory.
You need however need to use the standard path for the param_card or have the file ident_card within the same
directory as the param_card.dat.
2.7.0(20/01/20)
OM: Allow for a new syntax in presence of multi-jet/lepton process:
generate p p > 3j replaces p p > j j j
OM: Allow syntax for (fully) polarized particles at LO: [1912.01725]
ex: p p > w+{0} j, e+{L} e-{R} > mu+ mu- Z{T}
p p > w+{T} w-{0} j j, w+ > e+ ve, w- > j j
OM: (Thanks to K. Mawatari, K. Hagiwara) implemention of the axial gauge for the photon/gluon propagator.
via "set gauge axial"
OM: Support for elastic photon from heavy ion implemented. For PA collision, you have to generate your diagram
with "set group_subprocesses False"
OM: The default run_card.dat is now by default even more specific to your process.
Nearly all the cuts are now hidden by default if they do not impact your current process.
This allows to have less information by default in the run_card which should simplifies its
readibility.
OM: distinguish in the code if zero contribution are related to no point passing cuts or if
they are related to vanishing matrix-element. In the later case, allow for a lower threshold.
(This allow to fasten the computation of such zero contribution)
2.6.7(16/10/19)
OM: Fix a bug introduced in 2.6.2, some processes with gluon like particles which can lead to the wrong sign for interference term.
OM: Fix a bug introduced in 2.6.6 related to the restriction of model which was leading to wrong result for re-weighitng with loop model (but impact can in principle be not limited to re-weighting).
OM: systematics now supports the option --weight_format and --weight_info (see help command for details)
OM: set the auto_ptj_mjj variable to True by default
OM: the systematics_arguments default value is modified in presence of matching/merging.
OM: reweight: add an option --rwgt_info to allow to customise the banner information associate to that weight
RF: Fixed a bug in the warning when using FxFx in conjunction with Herwig++/Herwig7. Also, with latest version of
Herwig7.1.x, the FxFx needed files are compiled by default with in the Herwig code. Thanks Andreas Papaefstathiou.
2.6.6(28/07/19)
OM: Bug in the edition of the shower_card. The set command of logical parameter was never setting the
parameter to False. (Thanks to Richard Ruiz)
RF: Fixed a bug in the creation of the energy-stripped i_FKS momentum. Tested for several processes,
and seems to have been completely harmless.
OM: Forbidding the use of CKKW/default scale for some UFO model allowing gluon emission from quark with
no dependence in aS
OM: Add an option "keep_ordering" for reweighting feature to allow to sometimes use decay chain even if
you have ambiguity between final state particles.
OM: Fixed an issue with interference which sometimes happens when some polarization contribution were negative but not all of them.
VH: Change in the pythia8 output mode (thanks to Peter Skands)
OM: Any number in the cards (not only integer) can use multiplication, division and k/M suffix for times 1000 and 1 million respectively
OM: Energy cut (at LO) are now hidden by default for LHC type of run but visible for lepton collider ones.
OM: Same for beam polarization
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 particle where the default dynamical scale choice
was crashing
2.6.4 (09/11/18)
OM: add specific treatement for small width (at LO only and not for loop-induced)
if the width is smaller than 1e-6 times the mass, a fake width (at that value) is used for the
numerical evaluation of the matrix-element. S-channel resonances are re-scaled according to
narrow-width approximation to return the correct total cross-section (the distribution of events
will on the other hand follow the new width).
The parameter '1e-6' can be changed by adding to (LO) run_card the parameter: "small_width_treatment"
OM: add a new command "install looptools" to trigger the question that is automatically trigger
the first time a loop computation is needed.
RF: Fixed a bug when using TopDrawer plots for f(N)LO runs, where the combination of the plots could lead
to completely wrong histograms/distributions in case of high-precision runs.
OM: Fix some MLM crash for some processes (in particular BSM processes with W').
OM: Fix a bug in the reweighting due to the new lhe format (the one avoiding some issue with py8)
OM: Fix a behavior for negative mass, the width was set to negative in the param_card automatically
making the Parton-shower (and other code) to crash since this does not follow the convention.
OM: Change compiler flag to support Mojave.
2.6.3.2 (22/06/18)
OM: Fix a bug in auto-width when mass are below QCD scale.
OM: Fix a bug for g b initial state where the mass in the lhe file was not always correctly assigned
Note that the momentum was fine (i.e. in the file P^2 was not equal to the mention M but to the correct one)
OM: Improvment for madspin in the mode spinmode=none
OM: Fix a bug in MadSpin which was making MadSpin to work only in debug mode
2.6.3 (15/06/18)
OM: When importing model, we now run one additional layer of optimisation:
- if a vertex as two identical coupling for the same color structure then the associated lorentz
structure are merged in a single one and the vertex is modified accordingly
OM: When restricting a model, we also run one additional layer of optimisation
- Opposite sign coupling are now identified and merged into a single one
- if a vertex as two identical coupling (up to the sign) for the same color structure
then the associated lorentz structure are merged in a single one and the
vertex is modified accordingly
VH+OM: changing the ALOHA naming scheme for combine routine when the function name starts to be too long.
OM: adding a hidden parameter to the run_card (python_seed) to allow to control the randon number
generated within python and be able to have full reproducibility of the events
OM: Fixing some issue with the default dynamical scale choice for
- non minimal QED sample
- heft model when multiple radiation coming from the higgs decay/scattering
This can also impact MLM since it use the same definition for the dynamical scale
OM: Fix some issue for DIS scattering where the shat was wrongly defined for low energy scattering.
Low energy scattering are not adviced since they break the factorization theorem.
In particular the z-boost of the events are quite ill defined in that scenario.
OM: changing the format of the param_card for NLO model to match expectation from the latest PY8
OM: Update of MadSpin to allow special input file for the case of spinmode=none.
With that very simple mode of decay, you can now decay hepmc file or wrongly formatted leshouches event
(in that mode we do not have spin correlation and width effect)
PT: in montecarlocounter.f: improved colour-flow treatment in the case gluons are twice colour-connected to each other
new gfunction(w) to get smoothly to 0 as w -> 1. (for NLO+PS run)
OM: Fix some issue for the new QED model (including one in the handling of complex mass scheme of such model)
OM: Fixing an issue of the param_card out of sync when running compute-widths
OM: Adding Qnumbers block for ghost (the latest version of py8 was crashing due to their absence)
2.6.2 (29/04/18)
Heavy ion pdf / pdf in general:
-------------------------------
OM: Support for rescaling PDF to ion PDF (assuming independent hadron), this is well suited for Lead-Lead collision, p-Lead collision and fix-target
OM: Support in systematics.py for ion pdf. Possiblity to rescale only one beam (usefull to change only on PDF for fix target experiment)
OM: Removing internal support for old type of PDF (only supported internal pdf are now cteq6 and nnpdf23)
User Interface
--------------
OM: introduce "update to_full" command to display all the hidden parameter.
OM: introduce "update ion_pdf" and "update beam_pol" to add related section in the run_card.
the polarization of the beam is set as hidden parameter instead as default parameter
OM: improve handling of (some) run_card parameter:
- add comment that can be displayed via "help NAME"
- add autocompletion for some parameter
- add direct rejection of parameter edition if not in some allowed list/range
Bug fixes:
----------
OM: Fix issue with madspin introduced in 2.6.1 (failing to generate correct diagram for NLO process)
OM: fix crash in 1>N reweighting
RF+MZ: Fixed a problem with (f)NLO(+PS) runs in case the Born has identical QCD-charged
particles. Cross sections were typically correct, but some distributions might
have shown an asymmetry.
OM: Change in LO maching for HEFT (or any model with hgg vertex) in the way to flag jet that should
not take part in the matching/merging procedure.
OM: Fixed a bug for loop induced in gridpack mode
RF: Fixed a bug for ApplGrid: in rare cases the ApplGrid tables were filled twice for the same event
OM: Fixed a bug for fixed target experiment when the energy of the beam was set to 0.
RF: Fixed an issue where too many files were opened for fNLO runs in rare cases
OM: Fix issue on Madevent html output where some link where broken
OM: Fix issue for the display lorentz function (was also presenting security issue for online use)
OM: Fix issue for spin 3/2 (one in presence of fermion flow violation and one for custom propagator)
Enhancement:
-----------
OM: add the value of all the widths in Auto-width in the scan summary file
OM: For 1>N, if the user set fixed_run_scale to True, then the scale is choose accordingly
and not following the mass of the inital state anymore
RF: For the HwU histograms, if no gnuplot installation is found, write the gnuplot scripts in v5
format (instead of the very old v4 format).
OM: Change the default LO output directory structure. Now by default the lepton and neutrino are split
in two different directory. This avoids to face problem with the assymetric cut on lepton/neutrino
OM: loop-filter commands are now working for loop-induced processes
OM: New method avoiding that two process are running inside the same output directory.
This is implemented only for Gridpack and LO run so far.
The new method should be more robust in case of crash (i.e. not wrongly trigger as before)
OM: For LO scan, if a crash (or ctrl-c) occurs during the scan, the original param_card is now
restored.
2.6.1 (12/12/17)
RF+MZ: It is now possible to add LO matrix elements (with [LOonly])
to Fx-Fx merged samples. Thanks to Josh Bendavid for testing.
OM: Re-factoring the code asking which program to use (both at LO and NLO)
- design modular, designed for PLUGIN interactions
- the length of the question auto adapts to the size of the shell
OM: Allowing to have the gridpack stored on a readonly filesystem
OM: Fix a bug in matching/merging forbiding the pdf reweighting for some processes (since 2.4.0)
OM: Creation of online database with the name of known UFO model. If a use try to import a model
which does not exits locally, the code will automatically check that database and download the
associate model if it exists. You can contact us if you are the author of one model which is not
on our database.
The list of all available model is available by typing "display model_list"
OM: Model with __arxiv__ attribute will display "please cite XXXX.XXXXX when using this model" when
loaded for the first time.
OM: A fail of importing a UFO model does not try anymore to import v4 model
OM: Many model present in models directory have been removed, however they can still be imported
since they are available via automatic-download
OM: Refactoring of the gridpack functionality with an infinite loop to reach the requested number of events
OM+RF: Adding new class of cut at LO/NLO defined via the pdg of the particle
VH: Support for the latest version of MA5
MZ: Adding support for lhapdf v6.2
OM: Fixing various bug in the spinmode=onshell mode of MadSpin
OM: Fix a bug for model with 4 fermion in presence of restrict_card
OM: Fix aloha bug in presence of complex form-factor.
OM: improve auto-detection and handling of slha1/slha2 input file when expecting slha2.
2.6.0 (16/08/17)
New Functionalities:
--------------------
RF+OM: Added the possibility to also have a bias-function for event generation at (f)NLO(+PS)
OM: Improve Re-WEIGHTING module
1) creation of a single library by hyppothesis.
2) library for new hyppothesis can be specify via the new
options: change tree_path and change virt_path
3) allows to re-weight with different mass in the final states (LO only)
This forces to rewrite a new lhe file, not adding weight inside the file
(via the command: change output 2.0)
4) allows to run the systematics on the newly generated file (for new output file)
(via the command change systematics True)
5) Fix some Nan issue for NLO reweighting in presence of colinear emission
6) various bug fixing, speed improvement,...
OM: Add new option to SYSTEMATICS program:
--remove_weights, --keep_weights, --start_id
See "help systematics for more details."
OM: Allow to specify param_card, run_card,... directly via an html link.
Bug Fixing:
-----------
OM: Update condor class to support CERN type of cluster (thanks Daria Satco)
OM: Fixing a bug leading to a crash in pythia8 due to one event wrongly written when splitting the
events for the parralelization of pythia8
OM: Fixing an issue, leading to NAN for some of the channel of integration for complicated processes.
OM: Fix a bug in gripack@NLO which forbids to run it when the gridpack was generated with 0 events.
RF: Fixed bug #1694548 (problem with NLO for QCD-charged heavy vector bosons).
RF: Another fix (adding on a fix in 2.5.5) related to FxFx merging in case there are
RF: Fixed bug #1706072 related to wrong path with NLO gridpack mode
diagrams with 1->3 decays.
RF: Fixed a bug (found by SF) that gave a seriously biased resonance mass when using MadSpin for decaying a 2->1 process.
PT: Fix in montecarlocounter.f. Previously, for NLO+PS it was reading some subleading-colour information, now all
information passed to the MC counterterms is correctly leading colour.
OM: Fix systematics computation for lepton collider
OM+VH: Remove the proposition to install pjfry by default, due to many installation problem. The user can still force to
install it, if he wants to.
OM: Fix a problem of madspin when recomputing width for model loaded with --modelname option
OM: Fix events writing for DIS (thanks to Sho Iwamoto)
OM: Fix a problem of output files written .lhe.gz, even if not zipped (python2.6 only)
OM: Fixing some issue related to the customised propagator options of UFO model
Code Re-factorisation:
----------------------
RF: Refactor of the HwU.f fortran code. Gives more flexibility and potentially lower
memory requirements.
RF: Refactor of the (NLO) code related to extra weights (for PDF/scale uncertainties).
OM: Increase modularity of the code for the support of plugin (maddm and MPI@LO)
- Now we support the HPC plugin allowing to generate LO-gridpack on MPI machine
- Plugin can now use the "launch" keyword
2.5.5(26/05/17)
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 interface is modified (need to be requested as an analysis)
RF: Fix for FxFx merging in case there are diagrams with 1->3 decays.
2.5.4(28/03/17)
OM: Add a warning in presense of small width
OM: Fix a bug related to a missing library (introduced in 2.5.3)
OM: Improve stability of the onshell mode of MadSpin
VH: Fix some problem related to LHAPDF
2.5.3(09/03/17)
PT: Modified the default shower starting scale in montecarlocounter.f.
The new reference scale from which the dampening profile is computed is sum_i mt_i/2, i
being Born level final-state momenta.
OM: New "special mode" for madspin accessible via "set spinmode onshell".
This mode allow for full spin-correlation with 3 (or more) body decay but the decaying particle
remains exactly onshell in this mode. Loop-induced production/decay are not allowed in this mode.
OM+RF: Allowing for creation of LHE like output of the fixed order run at NLO.
This LHEF file is unvalid for parton-shower (all PS should crash on such file). It will be
unphysical to shower such sample anyway.
Two hidden parameters of the FO_analyse_card.dat allow some control on the LHEF creation
"fo_lhe_weight_ratio" allows to control the strength of a partial unweighting [default:1e-3]
increasing this number reduce the LHEF size.
"fo_lhe_postprocessing" can take value like nogrouping, norandom, noidentification.
nogrouping forbids the appearance of the LHEF(version2) tag <eventgroup>
norandom does not apply the randomization of the events.
noidentification does not merge born event with other born like counter-event
RF: Better job handling for fNLO runs.
VH: Fixing various problem with the pythia8 interface (especially for MLM merging)
Team: Fixing a series of small crash
2.5.2(10/12/16)
OM: improve systematics (thanks to Philipp Pigard)
OM: new syntax to modify the run_card: set no_parton_cut
This removes all the cut present in the card.
OM: change the default configuration parameter cluster_local_path to None
OM: change the syscalc syntax for the pdf to avoid using & since this is not xml compliant
OM: avoid to bias module to include trivial weight in gridpack mode
OM: Fix a bug making 2.5.1 not compatible with python2.6
OM: Improve "add missing" command if a full block is missing
OM: Fixing a bug reporting wrong cross-section in the lhef <init> flag (only in presence of
more than 80 channel of integration)
2.5.1 (04/11/16)
PT+MZ: New interface for Herwig7.
Fixed a bug in the Herwig7/Herwig++ counterterm (relevant to 2 -> n, n>2:
in particular, the bug affected the dead zone for final-final colour connection
in processes with more than two particles in the Born final state)
VH: Parallelization of PY8 at LO
OM: add the possibility to automatically missing parameter in a param_card
with command "update missing" at the time of the card edition. Usefull for
some SUSY card where some block entry are sometimes missing.
OM: Possibility to automatically run systematics program at NLO or Turn it off at LO
(hidden entry of the run_card systematics_program = systematics|syscalc|none)
RF: Some refactoring of the NLO phase-space generation,
including some small improvements in efficiency.
OM: Plugin can be include in a directory MG5aMC_PLUGIN the above directory need to be in
the $PYTHONPATH
OM: Fix systematics for e+ e- initial state.
VH: Fix various bug in the HepMc handling related to PY8 (LO generation)
OM: allow install maddm functionality (install ./bin/maddm executable)
2.5.0 (08/09/16)
FUNCTIONALITY
VH+OM: Adding an official interface to Pythia8 (parton shower) at Leading-Order
More information at https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/LOPY8Merging
VH+OM+MA5: Adding an official interface to MadAnalysis5 for plotting/analysis/recasting
More information at https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/UseMA5withinMG5aMC
OM: Introduces a new function for LO/NLO interface "systematics"
This function allows to compute systematics uncertainty from the event sample
It requires the event sample to have been generated with
- use_syst = T (for LO sample)
- store_reweight_info = T (for NLO sample)
At LO the code is run automatically if use_syst=T (but if SysCalc is installed)
VH+OM: Adding the possibility to bias the event weight for LO generation via plugin.
More informtion: https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/LOEventGenerationBias
VH+SP: extend support for CKKWL
CODE IMPROVMENT / small feature
-------------------------------
OM: Modify the structure of the output format such that all the internal format have the same structure
OM: Adding the Plugin directory. Three kind of plugin are currently supported
- plugin defining a new type of output format
- plugin defining a new type of cluster handling
- plugin modifying the main interface of MG5aMCnlo
More informations/examples are available here:
https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/Plugin
OM: Adding the possiblity of having detailled help at the time of the edition of the cards.
help mass / help mt / help nevents provided some information on the parameters.
OM: NLO/LO Re-weighting works in multi-core
OM: add an automatic update of the param_card to write the correct value for all dependent parameter.