Adding substructure variables

[lstroem]

BEGINRELEASENOTES

• Implemented substructure parameters commonly used for top tagging. The definition of these new variables can be adjusted from the steering file (added options to steer how to calculate the energy correlation function (energyCorrelator) and how to calculate NSubjettiness (axesMode and measureMode). Only recommended options are implemented. The beta parameter would typically be the same as used for jet clustering but can also be varied separately (beta weights the angular distances between the jet constituents compared to their pt in the calculation of the energy correlation function and subjettiness).
• The substructure variables are added to the file as a collection "TopTaggerSubStructure" of seven elements (order: C2, D2, C3, D3, tau1, tau2, tau3).
• This update is backwards compatible, with the only difference being the addition of this collection.

ENDRELEASENOTES

[lstroem]

DONE - Currently adding option to name the output collection from the steering file DONE - Adding also a bool to activate substructure variables or not (default will be false, i.e. nothing new added)

[lstroem]

• [x] Will add support for VLC algorithm in determination of substructure variables

[gaede]

@lstroem @andresailer Hi, this breaks our nightly builds with:

[ 75%] Building CXX object CMakeFiles/MarlinFastJet.dir/src/FastJetTopTagger.cpp.o
In file included from /scratch/nbuilds/gcc49/2018-05-21/MarlinFastJet/HEAD/src/FastJetTopTagger.cpp:13:0:
/scratch/nbuilds/gcc49/2018-05-21/MarlinFastJet/HEAD/./include/VLCAxes.h:3:45: fatal error: fastjet/contrib/AxesDefinition.hh: No such file or directory
#include <fastjet/contrib/AxesDefinition.hh>

Which version and configuration of fastjet is required for this to work ?

[petricm]

This was tested in the CI with 3.2.1

[lstroem]

Hi Frank,

I was using: /cvmfs/clicdp.cern.ch/software/FastJet/3.2.1/x86_64-slc6-gcc62-opt

from /cvmfs/clicdp.cern.ch/iLCSoft/builds/2017-05-30/x86_64-slc6-gcc62-opt/init_ilcsoft.sh

/Rickard

On 22 May 2018, at 11:09, Frank Gaede notifications@github.com wrote:

@lstroem https://github.com/lstroem @andresailer https://github.com/andresailer Hi, this breaks our nightly builds with:

[ 75%] Building CXX object CMakeFiles/MarlinFastJet.dir/src/FastJetTopTagger.cpp.o In file included from /scratch/nbuilds/gcc49/2018-05-21/MarlinFastJet/HEAD/src/FastJetTopTagger.cpp:13:0: /scratch/nbuilds/gcc49/2018-05-21/MarlinFastJet/HEAD/./include/VLCAxes.h:3:45: fatal error: fastjet/contrib/AxesDefinition.hh: No such file or directory

include <fastjet/contrib/AxesDefinition.hh>

Which version and configuration of fastjet is required for this to work ?

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[petricm]

As this is a contrib thing, did you build FastJetContrib with Nsubjettiness?

[gaede]

I don't know - we built it with the standard ilcsoft install script and:

ilcsoft.install( FastJet( FastJet_version ))
ilcsoft.module("FastJet").fjcontrib_version="1.017"

Which script did you use to build it ?

[petricm]

I think contrib 1.017 is too old (released 2015-05-05), and approx 3 year ago this was added to Nsubjettiness

https://fastjet.hepforge.org/trac/browser/contrib/contribs/Nsubjettiness/trunk

Why are you mixing fastjet 3.2.0 (released 2016-03-17) with fastjet-contrib 1.017(released 2015-05-05)? Did you maybe forget to bump the contrib version when updating the fastjet version? As 3.2.0 would go with 1.022 (which has AxesDefinition.hh).

We don't use iLCSoft to install external packages, they are provided independently.

[gaede]

Indeed, this is a bug in our script - in the versions file we have:

FastJet_version = "3.2.0"
FastJetcontrib_version = "1.024"

but then ignore the contrib version...
I can't find 'valid' combinations of FastJet and contrib versions on their website - which contrib versions did you use for your installations of FastJet (3.2.1, 3.2.2 and 3.3.0 ) ?

[petricm]

Indeed there is no "valid" pairing of the two, the releases are usually "quite" together

3.2.0 17 March 2016 1.022 30 March 2016

but then patches are fairly random. We use 3.2.1+1.025 since the release is from 11/2016.

[gaede]

Ok, thanks. Will then also use 3.2.1+1.025, to be compatible (and rely on the testing you've already done with this).