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ntuple:ivf [2013/09/20 15:55] – clange | ntuple:ivf [2013/10/23 18:00] (current) – [Steps for MSSM Hbb analysis] clange | ||
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====== Inclusive Vertex Finder (IVF) ====== | ====== Inclusive Vertex Finder (IVF) ====== | ||
- | need to check out two additional packages: | + | The IVF will run out-of-the-box in CMSSW_5_3_11. If unsure, you can check out the following two packages: |
+ | |||
+ | cvs co -r V02-02-06 RecoVertex/ | ||
+ | cvs co -r V01-10-02 RecoBTag/ | ||
+ | |||
+ | To use the same approach as the VHbb group, one also needs to check out two additional packages: | ||
cvs co -d IVF/ | cvs co -d IVF/ | ||
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Last command needed to update really old IVF package config files to BuildFile.xml files. | Last command needed to update really old IVF package config files to BuildFile.xml files. | ||
- | === Useful links === | + | ===== Work flow ===== |
- | partly used in VHbb ntuples: | + | |
- | *https:// | + | ==== General vertexing ==== |
+ | |||
+ | In order to get the IVF to work one has to perform inclusive vertexing by including [[https:// | ||
+ | |||
+ | process.load(' | ||
+ | |||
+ | The IVF runs on pre-selected vertices. After a coarse pre-clustering based on track distances and angles, vertices are reconstructed with the Adaptive fitter (outlier resistant, iterative procedure). This is done using the inclusive vertex finder from the [[https:// | ||
+ | |||
+ | * Source code: [[https:// | ||
+ | * Configuration file: [[https:// | ||
+ | |||
+ | These vertices are then merged depending on their significance in distance and the fraction of tracks they share (in particular vertices with a large fraction of common tracks are merged): | ||
+ | |||
+ | * Source code: [[https:// | ||
+ | * Configuration file: [[https:// | ||
+ | * using the standard config: | ||
+ | * maxFraction = 0.7 | ||
+ | * minSignificance = 2 | ||
+ | |||
+ | In the next step it is made sure that all tracks belong either to a secondary vertex or the primary vertex only optimising the assignment of tracks to vertices, followed by another vertex fit: | ||
+ | |||
+ | * [[https:// | ||
+ | * [[https:// | ||
+ | |||
+ | These refitted vertices are then again merged depending on their significance in distance and the fraction of tracks they share: | ||
+ | |||
+ | * Source code: [[https:// | ||
+ | * Configuration file: [[https:// | ||
+ | * config is overwritten by [[https:// | ||
+ | * maxFraction = 0.2 | ||
+ | * minSignificance = 10 | ||
+ | |||
+ | ==== b-vertex filtering ==== | ||
+ | |||
+ | The optimised vertices undergo a b-vertex filter: | ||
+ | |||
+ | * Source code: [[https:// | ||
+ | * Configuration file: [[https:// | ||
+ | |||
+ | ==== b to charm decay vertex merging ==== | ||
+ | |||
+ | The b-to-charm decay vertex merging attempts to identify B to D meson decays and merges them based on DeltaR, the vertex mass, the angle between them and the relative transverse momentum: | ||
+ | |||
+ | * Source code: [[https:// | ||
+ | * Configuration file: [[https:// | ||
+ | |||
+ | ===== Useful links ===== | ||
+ | partly used in VHbb ntuples: | ||
+ | * VHbb recipe: | ||
* http:// | * http:// | ||
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twiki documentation: | twiki documentation: | ||
- | * https:// | ||
* official recipe: https:// | * official recipe: https:// | ||
+ | * combination with CSV tagger: https:// | ||
CMSSW: | CMSSW: | ||
- | * http://cmssw.cvs.cern.ch/cgi-bin/cmssw.cgi/CMSSW/ | + | * https://github.com/cms-sw/cmssw/blob/ |
+ | * https:// | ||
+ | ===== Current errors ===== | ||
+ | none | ||
- | ===== Current errors ===== | ||
- | --- DataSetInfo | + | ===== Steps for MSSM Hbb analysis === |
- | --- DataSetInfo | + | |
- | ----- Begin FailPath Exception 20-Sep-2013 15:24:20 CEST----------------------- | + | |
- | An exception of category ' | + | |
- | [0] Processing run: 1 lumi: 2687 event: 805710 | + | |
- | [1] Running path ' | + | |
- | [2] Calling event method for module BVertexFilter/' | + | |
- | Exception Message: | + | |
- | Principal:: | + | |
- | Looking for type: std:: | + | |
- | Looking for module label: inclusiveMergedVertices | + | |
- | Looking for productInstanceName: | + | |
| | ||
- | ----- End FailPath Exception ------------------------------------------------- | + | Replace '' |
+ | |||
+ | Check for details of information: | ||
+ | RecoBTag/ | ||
+ | RecoBTag/ | ||
+ | |||
+ | And voila: | ||
+ | |||
+ | The bdiscriminators below will be written to the jet collection in the PATtuple (default is all, see PatAlgos/ | ||
+ | jetBProbabilityBJetTags | ||
+ | jetProbabilityBJetTags | ||
+ | trackCountingHighPurBJetTags | ||
+ | trackCountingHighEffBJetTags | ||
+ | simpleSecondaryVertexHighEffBJetTags | ||
+ | simpleSecondaryVertexHighPurBJetTags | ||
+ | simpleInclusiveSecondaryVertexHighEffBJetTags | ||
+ | simpleInclusiveSecondaryVertexHighPurBJetTags | ||
+ | combinedSecondaryVertexBJetTags | ||
+ | combinedSecondaryVertexMVABJetTags | ||
+ | softMuonBJetTags | ||
+ | softMuonByPtBJetTags | ||
+ | softMuonByIP3dBJetTags | ||
+ | simpleSecondaryVertexNegativeHighEffBJetTags | ||
+ | simpleSecondaryVertexNegativeHighPurBJetTags | ||
+ | negativeTrackCountingHighEffJetTags | ||
+ | negativeTrackCountingHighPurJetTags | ||
+ | combinedInclusiveSecondaryVertexBJetTags | ||
+ | combinedMVABJetTags | ||
+ | doubleSecondaryVertexHighEffBJetTags |