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PANDA GSI 13. December 2006 PID TAG Georg Schepers PANDA Technical Assessment Group PID Status Report G. Schepers for the PID TAG GSI PID TAG.

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Presentation on theme: "PANDA GSI 13. December 2006 PID TAG Georg Schepers PANDA Technical Assessment Group PID Status Report G. Schepers for the PID TAG GSI PID TAG."— Presentation transcript:

1 PANDA Meeting @ GSI 13. December 2006 PID TAG Georg Schepers PANDA Technical Assessment Group PID Status Report G. Schepers for the PID TAG GSI PID TAG http://wiki.gsi.de/cgi-bin/viewauth/Pandatagpid

2 PANDA Meeting @ GSI 13. December 2006 PID TAG Georg Schepers PID @ PANDA PANDA @ FAIR Global Requirements for PID PID TAG work - Kinematic Studies - Performance – Separation Power - Efficiency - Global PID analysis Conclusion and Outlook GSI PID TAG

3 PANDA Meeting @ GSI 13. December 2006 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

4 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers PANDA (PID) Detectors GSI PID TAG

5 PANDA Meeting @ GSI 13. December 2006 PID TAG Georg Schepers Subject - Requirements from physics - Evaluate potential of each subsystem - Matching of systems Deliverables - Definition of global PID scheme - Optimized set of detectors and parameters Time Frame - One year from asap ( PANDA Meeting @ DD 9.March 2006) GSI Global PID Requirements

6 PANDA Meeting @ GSI 13. December 2006 Georg Schepers PANDA Technical Assessment Group PID actual C. Schwarz, G. SchepersChair B. Kopf/ R. NowotnyBarrel Calorimeter R. Kaiser / B. Seitz Forward Cherenkov O. Denisov / M. P. Bussa / M. MaggioraMuon counter K. Föhl / P. Vlasov / M.Ehrenfried/ B.Seitz Cherenkov Counter J. Smyrski / P. Hawranek / O. WronskaForward Calorimeter Q. Weitzel / B. Ketzer / S. NeubertTPC (Carsten Schwarz /Aida Galoyan )ToF K. PetersDetectors GSI PID TAG

7 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers GSI PID TAG Work

8 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers GSI Kinematics of the PANDA decay channels Important input for common plots for Separation Power Solving open questions: - which quality for separation power do we need for different spatial regions ? - do we need a Forward Cherenkov ? MC truth studies for the PID - distinction between the different particles IDs - distinction between different momentum regions : < 1 GeV/c : PID via dE/dx and/or ToF (and TPC) > 1 GeV/c : PID via Cherenkov detectors - distinction between different spatial regions θ : 0° - 5° : FS- θ : 0° - 5° : Forward Spectrometer (FS) θ : 5° - 20° : forward part of the Target Spectrometer (TS) θ : 20° - 90° : forward part of the barrel region in the TS θ : 90° - 170° : backward part of the barrel region in the TS

9 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers GSI Kinematics of the PANDA decay channels DPM @ 2.0 GeV/cDPM @ 15.0 GeV/c

10 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers Do we need a Forward Cherenkov? GSI PID TAG

11 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers Forward Cherenkov GSI PID TAG Forward RICH angles: 0-5/10deg pions: 0.5 - 16 GeV/c kaons: 2 - 16 GeV/c protons: 2 - 20 GeV/c thickness 1.2m =~ 0.11 Xo

12 PANDA Meeting @ GSI 13. December 2006 PID TAG Georg Schepers Endcap DIRC 6 Parameter Analysis Endcap DIRC GSI Performance – Separation Power - Efficiency K – π - Separation Power: σ - lines as function of θ and p 1 2 3 4

13 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers Performance – Separation Power - Efficiency Example : Endcap DIRC GSI Distribution and Resolution of β Separation Power ( θ, p) Efficiency K π

14 PANDA Meeting @ GSI 13. December 2006 PID TAG Georg Schepers GSI Barrel DIRC Pin hole Focussing DIRC Time Of Propagation 3D DIRC

15 PANDA Meeting @ GSI 13. December 2006 PID TAG Georg Schepers GSI DIRC Parametrization Separation Power = l m1²-m2² l / (2 p² σ-track(θ) sqrt(n*n-1)) Path length [cm]Photons produced Separation Power vs p vs θ pθ θ θ p p Efficiency p θ θ p p

16 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers GSITPC

17 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers TPC Parametrization dE/dx GSITAG-PID Seperation Power = 2 l I1-I2 l / (sigmaI1/I1 + sigmaI2/I2) I is dE/dx of the resp. particle. (resolution 5%)

18 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers GSI (Barrel) EMC electron ID Studies Full simulation chain in BaBar like software - G4 simulation with the complete detector, digitization, full reconstruction for the EMC - single particles between 0.05 … 6.0 GeV/c and cos(  ) =  -0.7 … 0.7 - 10k e + - 10k  + Electron can be identified via - E/p (E: energy deposit of the cluster; p: reconstructed momentum of the track) - shower shape of the cluster Studies based on - complete EMC reconstruction - reconstructed energy deposit of the cluster - reconstructed shower shape of the cluster (Zernike moments) - events with only one cluster - tracking not taken into account yet

19 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers GSI (Barrel) EMC electron ID Studies – Training Neuronal Network e π Κ + + + eπΚeπΚ ++++++

20 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers GSI (Barrel) EMC electron ID Studies – Results e+e+ ++ e+e+ ++ all cut Κ+Κ+

21 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers GSI (Barrel) EMC electron ID Studies – Results

22 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers GSI (Barrel) EMC electron ID Studies - Outlook Electron ID via e/p and shower shape seems to work PID for p < 0.8 GeV/c to be improved need of precise test beam data and Monte Carlo models optimal training of the neuronal network necessary combination with other detectors (e.g. dE/dx, tof, cherenkov) studies with different crystal sizes

23 PANDA Meeting @ GSI 13. December 2006 PID TAG Georg Schepers GSI Forward Calorimeter Up 5 GeV/c down 1 GeV/c The Forward EMC can be treated in the same way as the Barrel EMC The groups from Bochum and Crocow work already on common simulations

24 PANDA Meeting @ GSI 13. December 2006 PID TAG Georg Schepers GSI Forward Calorimeter Objectives of the Shashlyk Calorimeter π/e discrimination energy, position and time measurement TPR Layout of a Shashlyk module 100 ps / sqrt(E)Time resolution 4.% / sqrt(E)Energy resolution 110 x 110 mm 2 Lateral dimensions 20 X 0 Radiation depth 59.8 mmEffective Moliere radius 0.275 mmLead layer thickness 1.5 mmScintillator layer thickness 378Number of layers

25 PANDA Meeting @ GSI 13. December 2006 PID-TAG Georg Schepers GSI Barrel ToF

26 PANDA Meeting @ GSI 13. December 2006 PID-TAG Georg Schepers Muon Counters GSIPID-TAG Different Strategies for muon identification in different momentum regions must be envisaged for muon detectors only out side the iron yoke: E mu < 1GeV : muons can not reach the muon trackers => identification Barrel DIRC, Barrel EMC E mu > 1 GeV : identification feasible by means of muon trackers (gaseous detectors) Basic detector features The bacis detector features for the muon trackers will be: Ar, CO2, CF4Gas mixture 25 nsecDouble hit resolution 100 nsecMaximal drift time 1 cmSingle plane space resolution (pitch size) 2-4 nsec Time resolution

27 Layer # 27 Layer # 7 PANDA Meeting @ GSI 13. December 2006 PID-TAG Georg Schepers Muon Counters GSIPID-TAG

28 PANDA Meeting @ GSI 13. December 2006 PID-TAG Georg Schepers Global PID Analysis GSIPID-TAG Evaluation for Global PID analysis for PANDA already started - number of PID variables ? - number of PID stages ? - combinations of detectors… Approches - Maximum Likelihood - method from other experiments compared (HERMES, Belle) First Conclusions taken: - Need of probability functions from test beam and simulations from all PID detectors and some traking input (e.g. p, θ) - Likelihood approach seems to be flexible enough - Analysis with Neuronal network interesting either as Global PID Analysis or as input for Likelihood method

29 PANDA Meeting @ GSI 13. December 2006 PID-TAG Georg Schepers GSI Conclusion for the PID TAG Separation Power parametrization and Efficiency determination prepared for some detectors for the others in progress Kinematic Plots for Benchmak channels available - background studies has to be done Questions : - Forward Cherenkov - positiv - TPC helpful as PID detector especially in low mommenta regions Concepts for Global PID Analysis under evaluation

30 PANDA Meeting @ GSI 13. December 2006 PID-TAG Georg Schepers GSI Outlook Next Steps: Need of precise detector tests and elaborated MC methods Need the Matching of - detector response functions - PID detectors with output from the tracking detectors

31 PANDA Meeting @ GSI 13. December 2006 TAG-PID Georg Schepers C. Schwarz, G. SchepersChair B. Kopf/ R. NowotnyBarrel Calorimeter R. Kaiser / B. Seitz Forward Cherenkov O. Denisov / M. P. Bussa / M. MaggioraMuon counter K. Föhl / P. Vlasov / M. EhrenfriedCherenkov Counter J. Smyrski / P. Hawranek / O. WronskaForward Calorimeter Q. Weitzel / B. Ketzer / S. NeubertTPC (Carsten Schwarz/Aida Galoyan )ToF K. PetersDetectors Thanks for important input: M. Düren, K. Götzen, Th. Hennino a.o. GSI PANDA Technical Assessment Group PID

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