PID TAG PANDA Technical Assessment Group PID Status

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

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

PANDA @ FAIR TAG-PID pp- and p. A-annihilation • wide range of momentum - p momentum: 1. 5 -15 Ge. V/c - mass range: 0 -6 Ge. V/c 2 • highest intensity 7 - event rate 2 x 10 /s - up to 10 reaction products • rich physics program Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

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

Global PID Requirements PID TAG • 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) Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

PID TAG PANDA Technical Assessment Group PID actual C. Schwarz, G. Schepers Chair B. Kopf / R. Nowotny Barrel Calorimeter R. Kaiser / B. Seitz Forward Cherenkov O. Denisov / M. P. Bussa / M. Maggiora Muon counter K. Föhl / P. Vlasov / M. Ehrenfried/ B. Seitz Cherenkov Counter J. Smyrski / P. Hawranek / O. Wronska Forward Calorimeter Q. Weitzel / B. Ketzer / S. Neubert TPC (Carsten Schwarz /Aida Galoyan ) To. F K. Peters Detectors Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

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

TAG-PID 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 Ge. V/c : PID via d. E/dx and/or To. F (and TPC) > 1 Ge. V/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 Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

Kinematics of the PANDA decay channels TAG-PID DPM@ @15. 0 2. 0 Ge. V/c Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

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

PID TAG-PID Forward Cherenkov Forward RICH angles: 0 -5/10 deg pions: 0. 5 - 16 Ge. V/c kaons: 2 - 16 Ge. V/c protons: 2 - 20 Ge. V/c thickness 1. 2 m =~ 0. 11 Xo Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

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

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

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

PID TAG DIRC Parametrization p p Separation Power = θ Path length [cm] l m 1²-m 2² l / (2 p² σ-track(θ) sqrt(n*n-1)) p θ Photons produced θ p p θ θ p Separation Power vs p vs θ PANDA Meeting @ GSI 13. December 2006 Efficiency Georg Schepers GSI

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

TAG-PID TPC Parametrization d. E/dx Seperation Power = 2 l I 1 -I 2 l / (sigma. I 1/I 1 + sigma. I 2/I 2) I is d. E/dx of the resp. particle. (resolution 5%) Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

(Barrel) EMC electron ID Studies TAG-PID • Full simulation chain in Ba. Bar like software - G 4 simulation with the complete detector, digitization, full reconstruction for the EMC - single particles between 0. 05 … 6. 0 Ge. V/c and cos( ) = -0. 7 … 0. 7 - 10 k e+ - 10 k + • 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 Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

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

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

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

(Barrel) EMC electron ID Studies - Outlook TAG-PID • Electron ID via e/p and shower shape seems to work • PID for p < 0. 8 Ge. V/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. d. E/dx, tof, cherenkov) • studies with different crystal sizes Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

Forward Calorimeter PID TAG Up 5 Ge. V/c down 1 Ge. V/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 Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

Forward Calorimeter PID TAG Objectives of the Shashlyk Calorimeter π/e discrimination energy, position and time measurement TPR Layout of a Shashlyk module Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

Barrel To. F PID-TAG Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

PID-TAG Muon Counters Basic detector features The bacis detector features for the muon trackers will be: Different Strategies for muon identification in different momentum regions must be envisaged for muon detectors only out side the iron yoke: E mu < 1 Ge. V : muons can not reach the muon trackers => identification Barrel DIRC, Barrel EMC E mu > 1 Ge. V : identification feasible by means of muon trackers (gaseous detectors) Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

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

PID-TAG Global PID Analysis • 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 Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

Conclusion for the PID TAG 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 Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

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

TAG-PID PANDA Technical Assessment Group PID C. Schwarz, G. Schepers Chair B. Kopf / R. Nowotny Barrel Calorimeter R. Kaiser / B. Seitz 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 ) To. F K. Peters Detectors Thanks for important input: M. Düren, K. Götzen, Th. Hennino a. o. Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI