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UpdateNotes.txt
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Update notes for MadGraph5_aMC@NLO (in reverse time order)
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):
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
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
** 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.
OM: add the check that the param_card is compatible with the model restriction.
OM: Adding the run_card options "event_norm" for the LO run_card (same meaning as NLO one)
VH: extend install command to install: lhapdf/pythia8
VH: Interfaced MadLoop to COLLIER for tensor integral reduction.
OM+VH: At the first loop/NLO computation, a new question will now be asked to choose which program
to install to compute the loop. You can still install additional method later via the "install" command
OM: Replace the mssm model by the MSSM_SLHA2 following the SLHA2 instead of the SLHA1 convention
BUG FIXING
----------
OM: Fix a bug in the helicity by helicity reweighting method. (introduced in 2.4.3)
OM: Fix a bug in the reweight_card where relative path was not understood from the local directory
where the program was runned by the user.
2.4.3 (01/08/16)
OM: Reduce the amount of log file/output generated for LO run (output can use up to three times less output).
OM: For the LO combination of events (unweighting) pass to the method previously used for loop-induced.
This method is faster and requires less I/O operation.
This fully remove the need of the file events.lhe.gz which is not created anymore (further reduce the ouput size)
OM: Optimise the code in order to be able to run scan with more than 2k steps.
OM: Optimise the lhe_parser module (use for the unweighting/re-weighing/...) around 20% faster than before.
OM: Fix a bug in MadSpin where the cross-section reported in the <init> block of the LHEF
was wrongly assigned when multiple process were present in the LHEF and that different Brancing ratio
were associated to each of those processes.
RF: For NLO process generation, fix a problem with turning on PDF reweighting with sets that have only a
single member. Also, allow for reweighting with up to 25 PDF sets (and their error members) for a single run.
OM: Fixing bug allowing to specify a UFO model by his full path for NLO computation (thanks Zachary Marschal).
OM: Fixing bug in LO re-weighting in case of helicity by helicity re-weighting. Now the events is boost back in
the center of mass frame to ensure consistency with the helicity definition.
2.4.2 (10/06/16)
OM: fix a compilation problem for non standard gfortran system
OM: reduce the need of lhapdf for standard LO run. (was making some run to test due to missing dependencies)
2.4.1 (10/06/16)
OM: Fix a bug in fix target experiment with PDF on the particle at rest.
The cross-section was correct but the z-boost was not performed correctly.
OM: Fix various bug in MadSpin
OM: Fix some bug in MLM merging, where chcluster was forced to True (introduced in 2.2.0)
OM: Allow to specify a path for a custom directory where to look for model via the environment
variable PYTHONPATH. Note this used AFTER the standard ./models directory
2.4.0 (12/05/16)
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 processes:
QED==2 and QCD>2: The first allows to select exactly a power of the coupling (at amplitude level
While the second ask for a minimum value.
RF: In the PDF uncertainty for fixed-order NLO runs, variations of alphaS were not included.
OM: In MLM matching, fix a bug where the alpha_s reweighting was not fully applied on some events.
(This was leading to effects smaller than the theoretical uncertainty)
OM: Fixing the problem of using lhapdf6 on Mac
MZ: Faster interface for LHAPDF6
OM: Add support of epsilon_ijk in MadSpin
OM: Fix multiple problem with multiparticles in MadSpin
OM: Improve spinmode=None in MadSpin
OM: Update the TopEffTh model
MZ: Fix problem with slurm cluster
OM: Improve scan functionalities
PT: New way of handling Pythia8 decays
RF: Fixed a bug that resulted in wrong event weights for NLO processes when requiring
a very small number of events (introduced in 2.3.3)
OM: Allow to keep the reweight information in the final lhe file for future computation
MZ: updated FJcore to version 3.1.3 (was 3.0.5)
2.3.3 (15/10/15)
OM: Allow new syntax for the param_card: instead of an entry you can enter scan:[val1, val2,...]
To perform a scan on this parameter.
OM: Having two mode for "output pythia8" one (default) for pythia8.2 and one for pythia8.1 (with --version=8.1)
RF: Rewriting of job-control for NLO processes. Better accuracy estimates for FO processes
RF: Fix for factorisation scale setting in FxFx merging when very large difference in scale in the
non-QCD part of a process.
RF: Better discarding of numerical instabilities in the real-emission matrix elements. Only of interested for
processes which have jets at Born level, but do not require generation cut (like t-channel single-top).
RF: Added an option to the run_card to allow for easier variation of the shower starting scale (NLO only).
RF: Fixed a problem in the setting of the flavour map used for runs with iAPPL >= 1.
RF: Allow for decay processes to compute (partial) decay widths at NLO accuracy (fixed order only).
OM: (SysCalc interface) Allow to bypass the pdf reweighting/alpsfact reweighting
MZ: fixed bug related to slurm clusters
OM: remove the addmasses.py script of running by default on gridpack mode.
if you want to have it running, you just have to rename the file madevent/bin/internal/addmasses_optional.py to
madevent/bin/internal/addmasses_optional.py and it will work as before. (Do not work with SysCalc tag)
OM: make the code compatible with "python -tt" option
2.3.2.2 (06/09/15)
VH: Finalized the MG5aMC-GoSam interface
2.3.2(20/08/15)
OM: Improve reweighting module. (https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/Reweight)
New Capabilities:
- allow to reweight by loop-induced processes
- allow to change model
- allow to change process definition
- allow to unweight the sample to have an idea of the statistical power.
- allow to perform some crude reweighting on NLO sample (reweighting by LO matrix element). NLO
accuracy is not preserved (in general) for such computation.
New dependencies:
- require the f2py module (part of numpy)
OM: change the kt-durham cut (at LO) such that particle comming from decay are not impacted if cut_decays
is on False.
VH: Fixed the check in helas wavefunction appearance order in an helas diagrams. It failed in cases
where additional wf were created during the fix of fermion flow in presence of majorana fermions.
RF: Fixed a bug in the aMCFast/ApplGrid interfaced introduced in the previous version.
OM: Fix a crash when using mssm-no_b_mass model (due to the SLHA1-SLHA2 conversion)
OM: Fix a bug in the add_time_of_flight function (not called by default) where the displaced vertex information
was written in second and not in mm as it should. Note that this function can now be run on the flight
by adding the following line in the run_card: " 1e-2 = time_of_flight #threshold for the displaced vertex"
RF: Small fix that leads to an improvement in the phase-space generation for NLO processes
OM: Fix a crash introduce in 2.3.0 when running sequentially in the same directory (thanks Gauthier)
OM: Improve aloha in the case of some expression reduces to pure float.
OM: In MadSpin, allow to specify cut for the 1>N decay in spinmode=none.
RF: Fixed a bug that gave bogus results for NLO runs when using an internal PDF which is not
NNPDF (like for the old cteq_6m, etc).
RF: Fixed a bug in the PDF combination in the HwU histograms: there was no consistent use if Hessian
and Gaussian approaches for MSTW/CTEQ and NNPDF, respectively.
OM: Fixed a small bug in EWdim6 which was removing a coupling in AZHH interaction.
OM: improve customize_model function to avoid problem with unity coupling.
RF: Improved the treatment of the bottom Yukawa. Thanks Marius Wiesemann.
2.3.1
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+VH: Various bug fixing for the loop-induced processes
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
2.3.0.beta(10/04/15) OM+VH: Adding the possibility to compute cross-section/generate events for loop-induced process
JB+OM: Addign matchbox output for matching in the Matchbox framework
OM+VH: Change the handling of the run_card.
- The default value depends now of your running process
- cut_decays is now on False by default
- nhel can only take 0/1 value. 1 is a real MC over helicity (with importance sampling)
- use_syst is set on by default (but for matching where it is keep off)
- New options added: dynamical_scale_choice, it can take the following value
-1 : MadGraph5_aMC@NLO default (different for LO/NLO/ ickkw mode) same as previous version.
0 : Tag reserved for user define dynamical scale (need to be added in setscales.f).
1 : Total transverse energy of the event.
2 : sum of the transverse mass
3 : sum of the transverse mass divide by 2
4 : \sqrt(s), partonic energy
OM: Cuts are also applied for 1>N processes (but the default run_card doesn't have any cut).
PT: Set command available for shower_card parameters
OM: New MultiCore class with better thread support
RF: Fixed a bug in the aMCfast/APPLGrid interface introduced in version 2.2.3
RF: Fixed a bug in the setting of the integration grids (LO process generation) for the minimum
energy needed for photons. The bug did not lead to any bias in event generation.
RF: Re-factoring of the structure of the code for NLO+PS computations.
RF+VH: Replaced the default topdrawer histograms with HwU histograms for f(N)LO runs
and allow it also for aMC@NLO runs.
RF+VB: Allow for variable bin-sizes in MG5_aMC+aMCfast+ApplGrid runs.
MZ+RF: Added 'LOonly' asNLO mode to export processes without any real and virtuals
(useful e.g. for higher multiplicities when merging)
RF: Added support for the computation of NLO+NNLL jet veto cross sections
RF: Fixed a bug in the Pythia8 interface: FxFx was not correctly initialized and all
events were incorrectly kept (introduced in v.2.2.3)
OM: Improve the function "print_result" (in the running interface)
add an option --format=short allowing to print the result in a multi-column format
OM: Possibility to not transfer pdf file to the node for each job.
This is done via a new option (cluster_local_path) which should contain the pdf set.
This path is intented to point to a node specific filesystem.
New way to submit job on cluster without writting the command file on the disk.
OM: Allowing MadSpin to have a mode without full spin-correlation but handling three (and more)
body decay. (set spinmode=none).
OM+PA: Fixing various bug in MadSpin.
2.2.3(10/02/15) RF: Re-factoring of the structure of the code for fNLO computations.
OM: Fix a bug in MadWeight (correlated param_card was not creating the correct input file)
RF: When requiring more than 1M events for (N)LO+PS runs, do not go to higher precision than 0.001
for the grids and cross section (can be overwritten with the req_acc run_card parameter).
RF: Make sure that reweight info (for PDF and scale uncertainties) also works for UNLOPS events.
RF: When setting the B's stable in the shower_card, also set the eta_b (PDG=551) stable.
OM: Change the Breit-Wigner splitting for the multi-channel integration, use the bwcutoff instead of
the hardcoded value 5.
MZ: Fix to bug 1406000 (segfault appearing when doing FxFx merging). Thanks to Josh Bendavid for
having reported it
MZ: Fix to a bug occurring when generating event in the "split" mode: the required output was
not correctly specified
OM: The built-in pdf "nn23lo" and "nn23lo1" where associate to the wrong lhapdfid in the lhef file
This was creating bias in using SysCalc. (Thanks Alexis)
OM: Fix a bug in the LO re-weighing module which was removing the
SysCalc weight from the lhe file (thanks Shin-Shan)
Team: Fixes to different small bugs / improvement in the error and warning messages
RF: For aMC runs, If a NAN is found, the code now skips that PS point and continues instead of
leading to NAN.
RF: For fNLO runs the virtuals were included twice in the setting of the integration grids.
This was not leading to any bias in previous version of the code.
2.2.2(06/11/14) OM: Correct a bug in the integration grid (introduces in 2.1.2). This was biasing the cross-section of
processes like a a > mu+ mu- in the Effective Photon Approximation by three order of magnitude.
For LHC processes no sizeable effect have been observe so far.
MZ: some informations for aMC@NLO runs which were before passed via include files are
now read at runtime. The size of executables as well as compilation time / memory usage
is reduced for complicated processes
RF: Fix crash #1377187 (check that cuts were consistent with the grouping was too restrictive)
RF: For NLO running: added 'strip' to the makefiles to reduce executable sizes (removes symbol info)
Stefano Carrazza (by RF): fix for the photon PDF for the internal NNPDF sets
RF: Improved the check on the consistency of the cuts and the grouping of subprocesse (LO running)
PT: enabled PYTHIA8.2
OM: restore the usage of external gzip library for file larger than 4Gb which were crashing with
the python gzip library
OM: Fixing the default card for Delphes
OM: Improve support of lsf cluster (thanks Josh)
OM: Adding support for the UFO file functions.py (which was ignored before)
OM: Reduce the amount of RAM used by MadSpin in gridpack mode.
OM: discard in MadWidth partial width lower than \Lambda_QCD for colored particle.
2.2.1(25/09/14) OM: Fix a bug preventing the generation of events at LO due to a wrong treatment of
the color-flow.
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.
2.1.2(03/07/14) OM: Fix a bug in ALOHA in presence of customized propagator (Thanks Saurabh)
OM: Fixing some compilation issue with MadWeight (Thanks A. Pin)
OM: Fixing a bug preventing MadWidth to run due to the model prefixing (depending
on the way it was called)
OM: Fixing a bug in MadSpin in the mssm model
RF: Added the invariant mass and DeltaR cuts for *same flavour* opposite sign lepton
pairs to the run_card for NLO-type generations.
RF: Added FxFx and UNLOPS merging with Pythia8
RF: Prevent an infinite loop in MadSpin by forcing the correct sign to the invariants
RF: Catch a possible error related to grouping subprocesses and setcuts
OM: Fix an error when using the "customize_model" command
S. Mrenna (by OM): Fix the include file in pythia8 output to be compliant with the latest
PY8 version
RF: Added a string with functional form for the scales to the event file banner (NLO only)
S. Brochet (by OM): Fix a bug in MadSpin with the writting of the mother ID in the LHE file.
Force the tag in the banner to always have the same case
increase momenta precision for the LHE file written by MadSpin
(thanks a lot to S. Brochet for all those patch)
PT: Integrated Jimmy's underlying event for Herwig6
OM: improve "add model" functionality allow to force particle identification.
PT: Bug fix in the normalisation of topdrawer plots for option 'sum' (as opposed to 'average')
RF: Fixed a bug related to the random seed when the code was not recompiled for a new run.
OM: Fixed a bug in MadEvent(LO) run, the generated sample were bias in presence of
negative cross-section. A negative cross-section is possible only if you use a NLO PDF
and/or if you edit the matrix.f by hand to have a non-definite positive matrix-element.
OM: When importing a model, check that there is not more than 1 parameter with the same name.
PT: Subsantial recoding of montecarlocounter.f and of a subroutine in fks_singular.f. Will help
future extensions like EW NLO+PS matching and numerical derivatives
OM: Fixing a wrong assignement in the color flow in presence of epsilon_ijk color structure.
Those events were rejected by Pythia8 due to this wrong color-flow.
MZ: Added the possibility to run the shower on a cluster, possibly splitting the lhe file
MZ: The c++ compiler can be specified as an option in the interface. On MACOSX, clang should
work now
OM: MadEvent output is now LHEFv3 fully compliant. A parameter in the run_tag (lhe_version)
allows to return LHEF version 2 format for retro-compatibility.
2.1.1(31/03/14) OM: Change the way the UFO model is handle by adding a prefix (mdl_) to all model variable.
This avoid any potential name conflict with other part of the code. This feature can be
bypassed by using the option --noprefix when importing the model.
OM: New command "add model XXX" supported. This command creates a new UFO model from two UFO model.
The main interest stand in the command "add model hgg_plugin", which add the effective operator
h g g to the original UFO model. The model is written on disk for edition/future reference.
RF: Reduced the calls to fastjet and skipped the computation of the reweight coeffients when
they are not needed.
OM: Fixed a bug for LO processes where the MMLL cut was not applied to the event sample.
PA: Fix a bug in MadSpin to avoid numerical instabitities when extracting t-channel invariants
from the production event file (see modification in driver.f, search for 'MODIF March 5, 2014')
OM: Better determination of which particles are in representation 3/3bar since FR is ambiguous on that point.
Now the determination also looks for 3 -3 1 interactions to check if that help.
OM: Fix a bug(crash) in MW linked to the permutation pre-selection module.
RF: Better comments in the code for user-defined cuts in the ./SubProcesses/cuts.f function.
Also the maxjetflavor parameter in the run_card is now actually working.
OM: Update SysCalc to:
- Fix a bug that some file where sometimes truncated.
- Allow for independant scale variation for the factorization/renormalization scale.
RF+OM: Improve the handling of conflicting Breit-Wigners at NLO
RF: Print the scale and PDF uncertainties for fNLO runs in the summary at the end of the run
2.1.0(21/02/14) 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 efficient way to group the computation for identical process with different final state.
- Possibility to Monte-Carlo over the permutation.
- More efficient way to choose between the various change of variable.
- Possibility to use mint (not compatible with all of the options)
- Possibility to use sobol for the generation of PS point (sometimes faster than pure
random point generator.
MadEvent/aMC@NLO UPDATE/BUG FIXING:
-----------------------------------
OM: Fix critical bug (returns wrong cross-section/width) for processes where the center of mass
energy of the beam is lower than 1 GeV. So this has no impact for LHC-collider phenomenology.
This can also impact computation of decay-width if the mass of that particle is below 1 GeV.
RF: Critical bug fixed (introduced in 2.0.2) for fixed order NLO runs that could
give the wrong cross section when the phase-space generation is inefficient
(like in the case for conflicting Breit-Wigners). This bug did not affect runs
with matching to the parton shower.
OM: Fix a bug leading to a crash with some decay syntax. i.e., p p > t t~, (t > w+ b), (t~ >w- b~)
OM: Fix format of LHE output for 1>N events when the <init> and mother information were wrongly set
to LHC default. Specific support of this option will be part of pythia8 (8.185 and later)
OM: Fix the syntax for the custom propagator to follow the description of arXiv:1308.1668
OM: Allow to call ASperGe on the flight if ASperGe module is include in the UFO model.
just type "asperge" at the moment where the code propose you to edit the param_card.
MADSPIN UPDATE:
---------------
OM: Allow to use another model for the decay than the one used for the production of events.
You are responsible of the consistency of the model in that case.
PA: Include hellicity information for the events generated by MadSpin.
OM: Fix a bug in MadSpin preventing the gridpack to run with NLO processes.
2.0.2(07/02/14) RF: Suppressed the writing of the 'ERROR in OneLOop dilog2_r' messages (introduced in the
previous version)
OM: Fix the bug that the shower_card.dat was wrongly identified as a pythia_card.
OM: add one MadSpin option allowing to control the number of simultaneous open files.