B-ID software overview - VR

1
B-ID code implementation

• Basics of implementation
• Tagger implementation
• Package overview
• More information
• http//www-d0.fnal.gov/nikhef/muonbtag/codechange/
  

2
Old implementation
ReadEvent
vertexTag
calls
modifies
bcjet_reco
eTag
bcJet
impTag
bcjet_analyze
3
New implementation
bcjet_reco
determines
ReadEvent
bcJetInit
JetChunk
eTagReco
eTagChunk
creates
bcjet_reco
impTagReco
creates
impTagChunk
Steered by rcp
vertexTagReco
creates
vertexTagChunk
bcjet_analyze
muTagReco
creates
muTagChunk
bcJetFinish
bcJetChunk
creates
4
Framework

• bcJetReco steered by bcJetReco.rcp
• Tells which packages to run
• Starts with bcJetInit, finalizes with bcJetFinish

bcJetReco.rcp string PackageName
"Controller" string Packages "init mutag etag
finish" RCP init ltbcjetreco bcJetInitgt RCP
finish ltbcjetreco bcJetFinishgt RCP mutag
ltbc_muTagreco bc_muTagrecogt RCP etag
ltbc_eTagreco bc_eTagrecogt
5
bcJetInit

• Figures out which JetChunk to use
• Steered by bcJetInit.rcp file
• Reads RCP used for Jet reconstruction
• Initializes EventUtilities object with correct
  JetChunkSelector

bcJetInit.rcp string PackageName
"bcJetInit" RCP ClusterAlgorithm ltcalreco
CalCone07gt
6
EventUtilities

• Singleton object used for event access
• Offers functions which extract the correct tag-
  and jetchunks
• Most important
• THandleltJetChunkgt getJetChunk(Event)
• Taggers must call above function to get correct
  JetChunk

7
bcJetFinish

• Final step in bcjet reconstruction
• Creates bcJetChunk
• Reads in each chunk made by each tagger
• Associates tag with correct jet
• Creates bcJet and stores associated tags

8
Tagger implementation

• xTagReco
• analyzes Jets xChunk
• creates one tag per Jet
• Tag can hold multiple physics objects
• Inserts xTagChunk in event
• xTagChunk must hold ChunkID of parent JetChunk
• xTagChunk needs function with signature
• xTagIndex getxTagIndex(const Jet jet) const
• returns a LinkIndex to xtag in chunk belonging to
  jet

9
Requirements on bcjet_analyze

• Blocks in bcjet_analyze have to be adapted to new
  bcJet
• Instead of calling properties of Jet, now call
  properties of tag

void BlockMuonaccumulate() vectorltmuTaggt
mutags bcjet.getMuTags(mutags) if(
mutags.size() 0 ) return muTag tag
mutags.front() int tagged (tag.getBJetProbabi
lity() gt 0.5) ? 1 0 AccumulateInt("Tagd",
tagged) AccumulateFloat("Px",
tag.muon().px())
10
Package overview
bcjetreco bcJetInit bcJetFinish
bcjet_utilities EventUtilities bcJetUtilities
bcjet_evt bcJet bcJetChunk xTag xTagChunk
bc_xTagreco bcXTagreco RegbcXTagReco
bcjet_analyze bcJetAnalyze BlockX
11
Multiple JetChunks
ReadEvent
bcjet_reco 1
bcJetInit 1
JetReco 1
eTagReco
JetReco 2
bcJetFinish
bcJetChunk 1
bcjet_reco 1
bcjet_reco 2
bcJetInit 2
bcjet_reco 2
muTagReco
bcjet_analyze
bcJetFinish
bcJetChunk 2
12
Packages involved

• All released in t01.39.00
• Framework packages
• bcjetreco, bcjet_utilities, bcjet_evt
• Tagger packages
• bc_eTagreco, bc_impTagreco, bc_likeTagreco,
  bc_muTagreco, bc_vtxTagreco
• Analysis package
• bcjet_analyze

13
Current status plans

• Implementation in t01.39.00 works fine
• Some small bugs need to be ironed out
• Crash in muon analyze code?
• Preparing a release involving all taggers and
  good B-ID for p09