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Implement Sherpa's PHOTONS++ as alternative for final-state radiation
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Authored by abudinen on Apr 19 2024, 7:40 PM.

Details

Reviewers

kreps
tlatham
jback

Commits

rEVTGENc9f7cb7d35f9: Implement Sherpa's PHOTONS++ as alternative for final-state radiation

Summary

This is a first full working version of an interface between EvtGen and
Sherpa's PHOTONS++ generator for final-state radiation.

This includes an additonal interface to use EvtGen's random-number generator inside Sherpa.

The intialisation of the interface updates Sherpa's KF_Table containing particle properties
based on EvtGen's PDL table.

The common model testing module was updated to add options for different FSR generators.
The possibility to specify the FSR generator as additional input argument was added to the testing module.

The modifications required to link with Sherpa's libraries and to build sherpa from source
where included in the respective EvtGen compilation files.

This is associated with T250 and !14.

Test Plan

Run compilation and new Sherpa PHOTONS++ tests.

Diff Detail

Repository

rEVTGEN evtgen

Branch

StudyWithSherpa

Lint

No Lint Coverage

Unit

No Test Coverage

Build Status

Buildable 306
Build 306: arc lint + arc unit

Event Timeline

abudinen requested review of this revision.Apr 19 2024, 7:40 PM

abudinen created this revision.

Harbormaster completed remote builds in B295: Diff 476.Apr 19 2024, 7:40 PM

abudinen retitled this revision from Fixed conflict in CMakeLists.txt to Implement Sherpa's PHOTONS++ as alternative for final-state radiation .Apr 19 2024, 7:42 PM

abudinen edited the summary of this revision. (Show Details)

abudinen changed the visibility from "All Users" to "Public (No Login Required)".

abudinen changed the edit policy from "All Users" to "Restricted Project (Project)".

abudinen added a project: Restricted Project.

abudinen mentioned this in T250: Add new plug-ins for Final-State-Radiation.

I added a few points to consult with Sherpa experts as we discussed.

src/EvtGenExternal/EvtSherpaPhotons.cpp
119	This will eventually need modifications to support newer Sherpa releases, eventually by adding `#ifdef` conditions.
275	We rely here on the fact that PHOTONS++ adds the new FSR photons at the end of the blob. We assume this wont change in the future. We need to check also how to obtain the info from l+l- produced by virtual-photon splitting in future Sherpa releases.

abudinen added inline comments.Apr 30 2024, 6:16 PM

src/EvtGenExternal/EvtSherpaPhotons.cpp
275	Based on the review by Marek, the order of particles in the Blob and the "S" flag will most likely remain as they are. As for the l+l- from virtual photons, we will have to adapt the code once Sherpa-3.0.0 is out.
test/testDecayModel.cc
170	I chatted with @jback about this. I think it would be good to enable the user to change the generator settings via decay file. But this is to be added in a subsequent merge request.

Moved internal Sherpa configurations for RNG interface into a dedicated cpp file.

Harbormaster completed remote builds in B302: Diff 486.May 1 2024, 4:12 PM

Looks good to me, many thanks @abudinen! But let's give the others some time to check through again just to be sure.

This revision is now accepted and ready to land.May 1 2024, 4:18 PM

I have a few minor suggestions about adding more comments and have suggested a way that we can define the Sherpa parameters via the decay file.

src/EvtGenExternal/EvtSherpaPhotons.cpp
187	Can we make a comment about what the integers 0 and 1 mean here?
220	Provide a comment about what the -1 integer is for.
224	Provide a comment to say this sets the state as "initial"?
247	Comment to say this is a "final" particle?
src/EvtGenExternal/EvtSherpaRandom.cpp
35	Do we need "eventually" here?
test/testDecayModel.cc
170	If we want to do this now, then perhaps something like the following could work (but I have not tested this): #include "EvtGenBase/EvtSymTable.hh" else if ( fsrGenerator == "Sherpa" ) { // Define Sherpa integer flags (say what they are) // Integer flag ierr set when retrieving decay file parameters int S1{1}, S2{0}, ierr{0}; // Retrieve parameters from decay file. const std::string S1Name = EvtSymTable::get( "SherpaFSR1", ierr ); const std::string S2Name = EvtSymTable::get( "SherpaFSR2", ierr ); // Update S1 and S2 parameters if they have been defined (may need to use string compare function here...) if ( S1Name != "SherpaFSR1" ) { S1 = atoi( S1Name.c_str() ); } if ( S2Name != "SherpaFSR2" ) { S2 = atoi( S2Name.c_str() ); } // Setup the Sherpa Photons model radCorrEngine = genList.getSherpaPhotonsModel( 1e-7, S1, S2 ); } Could also add the cut-off as a parameter. The `ierr` flag is a dummy control integer used by the `EvtSymTable` class: https://gitlab.cern.ch/evtgen/evtgen/-/blob/master/src/EvtGenBase/EvtSymTable.cpp#L55 It is always set to 0 and is not updated to be 1 (or -1) for "failed" when the decay parameter string is not found. When it fails, it just returns the parameter word and not the number. For the above code, if "Define SherpaFSR1 2" is set in the decay file, then the returned string will be "2", which is then converted to an integer. If this is not found, then the returned string will be "SherpaFSR1", which is not the integer string, and so the integer we declared earlier is not modified.

abudinen marked 6 inline comments as done.May 13 2024, 7:32 PM

abudinen added inline comments.

src/EvtGenExternal/EvtSherpaRandom.cpp
35	This is from the original code that Marek pointed us to. I am leaving it as it is.
test/testDecayModel.cc
170	In principle a good idea and I gave it a try, but it doesn't work yet because we need to first create the EvtGen object and then pass the decay file via `readUDecay` to have the `EvtSymTable::get` function retrieving the value. However, we need to setup the `radCorrEngine` to create the EvtGen object. So it is a sort of chicken and egg problem. So I think we need to leave this to a future differential.

Moved internal Sherpa configurations for RNG interface into a dedicated cpp file.
Adapt setupEvtGen.sh to new Photos and Tauola URLs
Update CI and Doxygen configs to include Sherpa
Disable Sherpa in HepMC2 build
Implemented comments by John.

Harbormaster completed remote builds in B306: Diff 491.May 13 2024, 7:40 PM

This code is ready to be merged. We will leave the ability to change the Sherpa configuration via decay file parameters as a future enhancement.

Add option for saving GCC temporary files (commented out for now)
Fix problem with GCC13 compilation of EvtSherpaRandom

Harbormaster completed remote builds in B307: Diff 492.May 14 2024, 4:11 PM

Fix problem with GCC13 compilation of EvtSherpaRandom

Harbormaster completed remote builds in B308: Diff 493.May 14 2024, 4:24 PM

Find Sherpa version and use it to control use of DECLARE_GETTER macro
Implemented support for fsrGenerator as argument for testing file. Implemented modification of output and ref files if FSR is on.
Implemented Tom's comments

Harbormaster completed remote builds in B309: Diff 494.May 20 2024, 1:19 PM

Reverted obsolete testing .json file sufixes.
Added entries into history and readme files.
Updated reference web sited for Photos and Tauola in readme file.

Harbormaster completed remote builds in B310: Diff 495.May 21 2024, 12:19 AM

abudinen edited the summary of this revision. (Show Details)May 21 2024, 12:30 AM

Fantastic, many thanks @abudinen!

Closed by commit rEVTGENc9f7cb7d35f9: Implement Sherpa's PHOTONS++ as alternative for final-state radiation (authored by tlatham, committed by abudinen). · Explain WhyMay 21 2024, 11:12 AM

This revision was automatically updated to reflect the committed changes.

abudinen added a commit: rEVTGENc9f7cb7d35f9: Implement Sherpa's PHOTONS++ as alternative for final-state radiation.

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Revision Contents
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History.md

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cmake/

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FindSherpa.cmake

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convertDecayFile.py

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setupEvtGen.sh

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CMakeLists.txt

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EvtGen.cpp

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EvtAbsLineShape.cpp

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Commit	Tree	Parents	Author	Summary	Date
afb246d78c1d	25f042c82433	f1526cec2ca9	Fernando Jesus Abudinen Gallego	Implemented comments by John.	May 13 2024, 7:38 PM
f1526cec2ca9	c477d63751d8	2b15292db6a1	Thomas Latham	Disable Sherpa in HepMC2 build	May 13 2024, 3:04 PM
2b15292db6a1	830ff2f8a3bd	ea48abb856c3	Thomas Latham	Update CI and Doxygen configs to include Sherpa	May 8 2024, 4:21 PM
ea48abb856c3	2f7e724f8bcc	d80ad12f4032	Thomas Latham	Adapt setupEvtGen.sh to new Photos and Tauola URLs (Show More…)	May 7 2024, 7:48 PM
d80ad12f4032	9ff1f9e9a2b7	ff147a06dcf6	Fernando Jesus Abudinen Gallego	Moved internal Sherpa configurations for RNG interface into a dedicated cpp… (Show More…)	May 1 2024, 4:10 PM
ff147a06dcf6	29bf39a7edd6	c138adeb7e42	Fernando Jesus Abudinen Gallego	Fixed conflict in CMakeLists.txt (Show More…)	Apr 19 2024, 7:31 PM
c138adeb7e42	e36cfede914a	998fb3b3ee5a	Thomas Latham	Avoid position counter in config vector.	Apr 17 2024, 4:23 PM
998fb3b3ee5a	a8a2d0db24a0	c1dc5c357781	Fernando Jesus Abudinen Gallego	Added needed commands to install sherpa	Apr 16 2024, 6:49 PM
c1dc5c357781	463eef261518	170bf70c3050	Fernando Jesus Abudinen Gallego	Added settings to build Sherpa from source.	Apr 16 2024, 6:23 PM
170bf70c3050	2cd378c23575	83ba4fb2625c	Fernando Jesus Abudinen Gallego	Implemented more style comments.	Apr 16 2024, 3:34 PM
83ba4fb2625c	574c292025b9	fdaf6c1380e1	Fernando Jesus Abudinen Gallego	Avoid memory leak for config vector. Implemented various comments on style.	Apr 15 2024, 8:55 PM
fdaf6c1380e1	d8774839cb6a	eb879dd1da6e	Fernando Jesus Abudinen Gallego	Added options for different generators in testing module	Apr 15 2024, 8:46 PM
eb879dd1da6e	22565b732ab6	569573290d5a	Fernando Jesus Abudinen Gallego	Fixed conflicts after rebasing.	Apr 12 2024, 8:33 PM
569573290d5a	09172c136814	7a84abf3f3f6	Fernando Jesus Abudinen Gallego	Added function to updated Sherpa's particle list.	Apr 12 2024, 7:41 PM
7a84abf3f3f6	16ee8a399722	9c78f0a00cd8	Fernando Jesus Abudinen Gallego	Implemented interface for Sherpa-EvtGen random number generation.	Apr 4 2024, 7:25 PM
9c78f0a00cd8	ec10abaf1e91	462249c3d707	Fernando Jesus Abudinen Gallego	Use unique pointers.	Mar 20 2024, 10:30 AM
462249c3d707	5e29cd2fb270	afbb9d85ce32	Fernando Jesus Abudinen Gallego	Add Draft derived class for Sherpas RNG.	Mar 18 2024, 5:06 PM
afbb9d85ce32	f910efd91a87	805f1b1ee068	Fernando Jesus Abudinen Gallego	First full version of interface ready	Mar 18 2024, 4:54 PM
805f1b1ee068	d7d3689a8c6d	f61d0219f28b	Fernando Jesus Abudinen Gallego	Continued work to interface to SHERPA's PHOTONS	Mar 17 2024, 7:47 PM
f61d0219f28b	d6969c148ada	c4d56d412857	Fernando Jesus Abudinen Gallego	Added missing library.	Mar 16 2024, 12:05 AM
c4d56d412857	5d706a2bd451	4b7c38d564c2	Fernando Jesus Abudinen Gallego	Restored PHOTOS definition in external generators list.	Mar 11 2024, 3:28 PM
4b7c38d564c2	cb2a30ec8a8d	e09d953e2bad	Fernando Jesus Abudinen Gallego	Commented out test of Sherpa since not default yet.	Nov 19 2023, 10:50 AM
e09d953e2bad	be16ef5f7537	171c7e97bdc8	Fernando Jesus Abudinen Gallego	Added ifdef for Sherpa in EvtExternalGenList	Nov 19 2023, 10:37 AM
171c7e97bdc8	91c6a84e5302	9860be9d079f	Fernando Jesus Abudinen Gallego	Added ifdef for sherpa src interface.	Nov 19 2023, 10:33 AM
9860be9d079f	3275dcccce5d	52b490564515	Fernando Jesus Abudinen Gallego	Merged SherpaPhotonsEngine into SherpaPhotons class.	Nov 19 2023, 10:26 AM
52b490564515	38d34c4b99f8	bd48b7fe5585	Fernando Jesus Abudinen Gallego	Fixed conflict in CMakeLists.txt	Nov 16 2023, 5:12 PM
bd48b7fe5585	a83efdf9110b	71451a4ee2bd	Thomas Latham	Rename member variables to follow convention of m_ prefix (Show More…)	May 8 2024, 11:58 AM
71451a4ee2bd	da8294b243dc	71807eba8af5	Thomas Latham	Drop redundant EVTGEN_CPP11 preprocessor switch (Show More…)	Apr 24 2024, 3:54 PM
71807eba8af5	a5f0b7497d35	593f5090a830	Fernando Jesus Abudinen Gallego	Replaced PHOTOS with FSR flags in examples and tests. (Show More…)	Apr 22 2024, 5:41 PM
593f5090a830	c82a6971a158	4120f59025a0	Fernando Jesus Abudinen Gallego	Simplified pre-processor behaviour for PHOTOS. (Show More…)	Apr 22 2024, 4:55 PM

Implement Sherpa's PHOTONS++ as alternative for final-state radiationClosedPublicActions

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Revision ContentsChangeset List

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EvtGenBase/EvtDalitzPoint.hh

EvtGenBase/EvtDalitzResPdf.hh

EvtGenBase/EvtDalitzReso.hh

EvtGenBase/EvtDecayAmp.hh

EvtGenBase/EvtDecayBase.hh

EvtGenBase/EvtDecayIncoherent.hh

EvtGenBase/EvtDecayMode.hh

EvtGenBase/EvtDecayProb.hh

EvtGenBase/EvtDecayTable.hh

EvtGenBase/EvtDiracParticle.hh

EvtGenBase/EvtDiracSpinor.hh

EvtGenBase/EvtEvalHelAmp.hh

EvtGenBase/EvtExtGeneratorCommandsTable.hh

EvtGenBase/EvtFlatte.hh

EvtGenBase/EvtGammaMatrix.hh

EvtGenBase/EvtHepMCEvent.hh

EvtGenBase/EvtId.hh

EvtGenBase/EvtIncoherentMixing.hh

EvtGenBase/EvtIntervalFlatPdf.hh

EvtGenBase/EvtLASSAmp.hh

EvtGenBase/EvtMTRandomEngine.hh

EvtGenBase/EvtMassAmp.hh

EvtGenBase/EvtMatrix.hh

EvtGenBase/EvtModel.hh

EvtGenBase/EvtModelAlias.hh

EvtGenBase/EvtMultiChannelParser.hh

EvtGenBase/EvtNeutrinoParticle.hh

EvtGenBase/EvtNonresonantAmp.hh

EvtGenBase/EvtOrthogVector.hh

EvtGenBase/EvtPDL.hh

EvtGenBase/EvtParser.hh

EvtGenBase/EvtParserXml.hh

EvtGenBase/EvtPartProp.hh

EvtGenBase/EvtParticle.hh

EvtGenBase/EvtParticleDecay.hh

EvtGenBase/EvtParticleDecayList.hh

EvtGenBase/EvtPatches.hh

EvtGenBase/EvtPdf.hh

EvtGenBase/EvtPdfMax.hh

EvtGenBase/EvtPdfSum.hh

EvtGenBase/EvtPoint1D.hh

EvtGenBase/EvtPredGen.hh

EvtGenBase/EvtPropFlatte.hh

EvtGenBase/EvtPropGounarisSakurai.hh

EvtGenBase/EvtPropagator.hh

EvtGenBase/EvtPto3PAmp.hh

EvtGenBase/EvtPto3PAmpFactory.hh

EvtGenBase/EvtRadCorr.hh

EvtGenBase/EvtRandom.hh

EvtGenBase/EvtRaritaSchwinger.hh

EvtGenBase/EvtRaritaSchwingerParticle.hh

Implement Sherpa's PHOTONS++ as alternative for final-state radiation
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