development of the partical identification in the panda – experiment report in the technical board...
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Development of the Partical IDentification
in the PANDA – Experiment
Report in the Technical Board
Georg Schepers for the PID TAG
PANDA – meeting 18. September 2007
Georg SchepersGSI
Georg Schepers
• PANDA @ FAIR
• Development of a PID-Concept
- Physics
- Studies of Kinematics
- Properties of Detectors Efficiency
- Global PID-Analysis
• Conclusion and Outlook
GSI
PID @ PANDA –
–
PANDA – meeting 18. September 2007
TAG-PID
Georg Schepers
pp- and pA-annihilation
GSI
PANDA @ FAIR
• wide range of momentum - p momentum: 1.5-15 GeV/c - mass range: 0-6 GeV/c • highest intensity - event rate 2 x 10 /s - up to 10 reaction products
• rich physics program
7
2
PANDA – meeting 18. September 2007
Georg SchepersGSI
PANDA @ FAIR
Target-Spectrometer
Forward-Spectrometerp
Target
–
PANDA – meeting 18. September 2007
Georg SchepersGSI
Kinematics of the Decay Channels
2.0 GeV/c
Target-SpectrometerForward-Spectrometer
PANDA – meeting 18. September 2007
Georg SchepersGSI
Kinematics of the Decay Channels
2.0 GeV/c15.0 GeV/c
Target-SpectrometerForward-Spectrometer
PANDA – meeting 18. September 2007
PANDA Meeting @ GSI 13. December 2006
TAG-PID
Georg SchepersGSI
Physics at PANDA
Now actual input from the Physics Book analizers! (Marc Pelizaeus, Bertram Kopf)
Georg SchepersGSI
PHYSIK @ PANDA
PANDA – meeting 18. September 2007
Georg Schepers
TPC Parametrisierung dE/dx
GSI
Tei
lch
entr
en
nu
ng
N = 2 I1 – I2
(I2)
dE
/dx
PANDA – meeting 18. September 2007
Georg SchepersGSI
DIRC Parametrization
p θθ
θ
p
pp θ
p
N m1
2 – m22
2 p2 trackn2-1
Ref.: PDG
Path length L [cm]
p θp
L
produzierte Photonen
θpp
Nphoton
θpp θp
N
PANDA – meeting 18. September 2007
Georg SchepersGSI
ToF RPC Separation power at various angles
ALICE RPC 50ps resolution
Separation = ( t1 – t2 ) / σ
PANDA – meeting 18. September 2007
Georg SchepersGSI
ToF RPC Separation power at various angles
PANDA – meeting 18. September 2007
Georg SchepersGSI
EMC
e+ e- physics seems feaseble with the EMC
- Background suppression ( ) with PID
PANDA – meeting 18. September 2007
Georg SchepersGSI
EMC
PANDA – meeting 18. September 2007
Georg SchepersGSI
EMC
11 cm 1 cm
Electron (Positron) Distributions in the EMC for different Distances to the DIRC
• Inhomogenities
• Losses
PANDA – meeting 18. September 2007
Georg SchepersGSI
Endcap Cherenkov Counter
PANDA – meeting 18. September 2007
Charmonium Spectroscopy:pp hc ηc γ Ks K π γ at 5.609 MeV/c
pt [
GeV
/c]
pt [
GeV
/c]
Georg SchepersGSI
Endcap Cherenkov Counter
PANDA – meeting 18. September 2007
Charmonium Spectroscopy:pp hc ηc γ Ks K π γ at 5.609 MeV/c
DISC Barrel DIRC
2σ
3.5σ
5σ
6σ
pt [
GeV
/c]p t
[GeV
/c]
pt [
GeV
/c]
Barrel DIRC
DISC
Very Simplified Illustration of a Separation Power Distribution!
Georg SchepersGSI
Endcap Cherenkov Counter
• Comparisson of the different Endcap Solutions,
Presentation of Bjoern Seitz in the Technical Board
• Resolution Studies for a Multi-chromatic Time-of-Propagation Endcap DIRC for PANDA,
M. Düren et al., Report of University of Gießen, Sept.07
PANDA – meeting 18. September 2007
• layout studies for muon id• background studies with PYTHIA • open questions
Muon subgroup report
Benchmark channel: DY @ 14 GeV/c — Xμμpp
ABianconi Drell - Yan Generator
Focus on two Mdilepton ranges
Low Mass 1.1<Md<1.5 GeV Medium Mass 1.5<Md<2.5 GeV
Barrel and endcap segmentation
??
Barrel segmentation
Background: dipions with the dimuon kinematics
Endcap segmentatio
n
Georg Schepers
Global PID Analysis
GSI
• Development of a Global PID Analysis - Combination of Detector Responses
• Analysis with a Neuronal Net
• Maximum Likelihood Method
• Needed Information - Probability Density Functions for the detectors from Simulations and Test beam times
PANDA – meeting 18. September 2007
Georg SchepersGSI
• Particle Separation - Parametrization for single Detectors done - uniform definition (PID TAG session) - Need of Detector Simulations and Tests
• Benchmark Channels - From Analizers of the Physics Book
• Global Analysis - Concepts under Evaluation
Conclusion and Outlook
PANDA – meeting 18. September 2007
Georg SchepersGSI
Conclusion and Outlook
PID TAG
C. Schwarz, G. Schepers Chair
B. Kopf / R. Nowotny Barrel Calorimeter
R. Kaiser / B. Seitz / M. Hoek Forward Cherenkov
O. Denisov / M. P. Bussa / M. Maggiora Muon counter
K. Föhl / P. Vlasov / M. Ehrenfried Cherenkov Counter
J. Smyrski / P. Hawranek / O. Wronska Forward Calorimeter
Q. Weitzel / B. Ketzer / S. Neubert TPC
(Carsten Schwarz/Aida Galoyan ) ToF
K. Peters Detectors
Thanks for important input:
M. Düren, K. Götzen, Th. Hennino, Marc Pelizaeus a. o.
PANDA – meeting 18. September 2007