1. Tracking muons in Panda(Root)
Stefano Spataro
ISTITUTO NAZIONALE
DI FISICA NUCLEARE
Sezione di Torino

2. Overview Geometry Implementations MDT Pattern Recognition
Reconstruction for global PID
In the next future

3. Geometry Implementations

4. Torino Design simplified geometry ArCo2 planes 2,5 cm thickness Barrel
(George Serbanut)
simplified geometry
ArCo2 planes
2,5 cm thickness
PndMdt *Muo = new PndMdt("MDT",kTRUE):
Muo->SetBarrel("torino");
Muo->SetEndcap("torino");
Muo->SetMuonFilter("torino");
fRun->AddModule(Muo);
Barrel
Encap
Muon Filter

5. Dubna Design Barrel Encap Muon Filter Forward detailed geometry
(Valery Rodionov)
PndMdt *Muo = new PndMdt("MDT",kTRUE);
Muo->SetBarrel("muon_TS_barrel_v3_noGeo.root");
Muo->SetEndcap("muon_TS_endcap_noGeo.root");
Muo->SetForward("muon_Forward_noGeo.root");
Muo->SetMuonFilter("muon_MuonFilter_noGeo.root");
fRun->AddModule(Muo);
Barrel
Encap
Muon Filter
Forward
detailed geometry

6. Full CAD conversion (Tobias Stockmanns)
Magnet Design
Full CAD conversion (Tobias Stockmanns)
FairModule *Magnet= new PndMagnet("MAGNET");
Magnet->SetGeometryFileName
("FullSolenoid_V842.root");
fRun->AddModule(Magnet);
Coils CAD conversion (Tobias Stockmanns)
FairModule *Magnet= new PndMagnet("MAGNET");
Magnet->SetGeometryFileName
("FullSuperconductingSolenoid_V831.root");
fRun->AddModule(Magnet);
MDT Design - TDR (George Serbanut)
PndMdt *Muo = new PndMdt("MDT",kTRUE);
Muo->SetBarrel…
Muo->SetMdtMagnet(kTRUE);
Muo->SetMdtMFIron(kTRUE);
fRun->AddModule(Muo);

7. some overlaps still present sometimes the analysis can crash
Magnet Design
CAD conversion files
some overlaps still present
sometimes
the analysis can crash
for the moment is it safer to use MDT version
MDT Design
10  @3GeV/c
Barrel
Endcap
Muon Filter
Forward
CPU Time
Torino
3 sec
Dubna
3 min
Dubna Endcap
does not follow TDR
(overlaps with yoke)
Dubna geometry
not optimized

8. MDT Pattern Recognition

9. Detector Setup
GEANT3
MVD
TPC
TOF
DIRC
EMC
GEM
MDT (Torino)
COILS (CAD)
YOKE (MDT)
DISC
PIPE

10. MdtHit Energy Loss > 0
Simulation Setup
GEANT3
// MDT hit producers
PndMdtHitProducerIdeal* mdtHitProd = new PndMdtHitProducerIdeal();
mdtHitProd->SetPositionSmearing(0.3); // position smearing [cm]
fRun->AddTask(mdtHitProd);
PndMdtTrkProducer* mdtTrkProd = new PndMdtTrkProducer();
mdtTrkProd->SetVerbose(10);
fRun->AddTask(mdtTrkProd);
MdtHit Energy Loss > 0
MdtHit Position Smearing 0.3 cm -> 1 cm bar

11. MdtHit from inner layer
Pattern Recognition
MdtHit from inner layer
one tracklet PndMdtTrk
closest hit in next layer
in a search cone
and so on…
and so on…
Enccap and Muon Filter
threated as single module

12. MdtHitTrk Information
Pattern Recognition
MdtHitTrk Information
Mdt Module (barrel/EC/hybrid)
Number of fired layers
Maximum fired layer
Number of hits inside search cone
for each layer
Index of the closest MdtHit
Number of hits inside search cone
Distance from hit in previous layer
Layer distance

13. Geometry Parametrization
Layer Position recognised from geometry
Independent from Torino/Dubna design
Barrel
Endcap+MF
TORINO
Torino -> Working
Dubna -> Muon Filter missing
Dubna -> Double Layer 0 (?)

14. Hybrid Pattern Recognition 5000  3 GeV/c [5°, 90°] HYBRID ENDCAP+MF
BARREL
ENDCAP+MF
HYBRID

15.  @ 1 GeV/c  @ 1 GeV/c Test Simulation Data 5000 events PID  , 
P  1, 3 GeV/c
  [5°, 90°]
  [0°, 360°] EC
BARREL
 @ 1 GeV/c EC
BARREL
Momentum Loss
Vertex – MDT Layer 0
DISC is missing

16. Hit Distances
Hit
Distance
Layer
Distance
3 GeV/c

17. 3 GeV/c
BARREL
ENDCAP+MF
HYBRID
BARREL
ENDCAP+MF
HYBRID

18. 3 GeV/c
hybrid
barrel
EC+MF
secondaries

19.  @ 3 GeV/c  @ 3 GeV/c Hit Distances – 3 GeV/c BARREL ENDCAP+MF
HYBRID
3 GeV/c
BARREL
ENDCAP+MF
HYBRID
3 GeV/c

20. Hit Multiplicities – 3 GeV/c
BARREL
ENDCAP+MF
HYBRID
3 GeV/c
BARREL
ENDCAP+MF
HYBRID
3 GeV/c

21. Fired Layers – 3 GeV/c
3 GeV/c
3 GeV/c

22. Fired Layers – 3 GeV/c             BARREL EC+MF HYBRID
log scale
log scale
log scale      

23.  @ 1 GeV/c  @ 1 GeV/c Hit Distances – 1 GeV/c BARREL ENDCAP+MF
HYBRID
1 GeV/c
BARREL
ENDCAP+MF
HYBRID
1 GeV/c

24. Hit Multiplicities – 1 GeV/c
BARREL
ENDCAP+MF
HYBRID
1 GeV/c
BARREL
ENDCAP+MF
HYBRID
GeV/c

25. Fired Layers – 1 GeV/c
1 GeV/c
1 GeV/c

26. Fired Layers – 1 GeV/c             BARREL EC+MF HYBRID
log scale
log scale
log scale      

27. Reconstruction for global PID

28. Track Propagation to MDT layers
MDT hit
(layer 0)
GEANE
extrapolation
LHE/genfit
tracking

29. Extrapolation Residuals
ENDCAP + MF
BARREL
3 GeV/c
@ 3 GeV/c
1 GeV/c
3 GeV/c
@ 3 GeV/c
1 GeV/c

30. 3 GeV/c
@ 3 GeV/c
1 GeV/c
Barrel Propagation

31. Reconstruction of
’  J/ + -
J/  + -
MC  !
MC  

32. Jobs still to do Geometry Implementation – Some fixes required
Pattern Recognition working – Improvement needed
PID Correlation – P dependent matching window
Kalman with MDT hits