Development of the Partical IDentification in the PANDA

Development of the Partical IDentification in the PANDA – Experiment Report in the Technical Board Georg Schepers for the PID TAG Georg Schepers PANDA – meeting 18. September 2007 GSI

– PID @ PANDA – • PANDA @ FAIR • Development of a PID-Concept - Physics - Studies of Kinematics - Properties of Detectors Efficiency - Global PID-Analysis • Conclusion and Outlook Georg Schepers PANDA – meeting 18. September 2007 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 18. September 2007 GSI

– PANDA @ FAIR Target Forward. Spectrometer p Target-Spectrometer Georg Schepers PANDA – meeting 18. September 2007 GSI

Kinematics of the Decay Channels 2. 0 Ge. V/c Forward-Spectrometer Target-Spectrometer Georg Schepers PANDA – meeting 18. September 2007 GSI

Kinematics of the Decay Channels 15. 0 2. 0 Ge. V/c Forward-Spectrometer Target-Spectrometer Georg Schepers PANDA – meeting 18. September 2007 GSI

Physics at PANDA TAG-PID Now actual input from the Physics Book analizers! (Marc Pelizaeus, Bertram Kopf) Georg Schepers PANDA Meeting @ GSI 13. December 2006 GSI

PHYSIK @ PANDA Georg Schepers PANDA – meeting 18. September 2007 GSI

d. E/dx Teilchentrennung [s] TPC Parametrisierung d. E/dx Ns = 2 I 1 – I 2 s(I 1) + s(I 2) Georg Schepers PANDA – meeting 18. September 2007 GSI

DIRC Parametrization Nphoton Ns L p p θ θ q θ p p p Path length L [cm] θ qθ produzierte Photonen m 1 2 – m 2 2 Ns 2 p 2 strack(q) p p p θ θ n 2 -1 Ref. : PDG Georg Schepers PANDA – meeting 18. September 2007 GSI

To. F RPC Separation power at various angles Separation = ( t 1 – t 2 ) / σ ALICE RPC 50 ps resolution Georg Schepers PANDA – meeting 18. September 2007 GSI

To. F RPC Separation power at various angles Georg Schepers PANDA – meeting 18. September 2007 GSI

EMC - Background suppression ( ) with PID e+ e- physics seems feaseble with the EMC Georg Schepers PANDA – meeting 18. September 2007 GSI

EMC Georg Schepers PANDA – meeting 18. September 2007 GSI

EMC 11 cm • Inhomogenities • Losses Electron (Positron) Distributions in the EMC for different Distances to the DIRC Georg Schepers PANDA – meeting 18. September 2007 GSI

Endcap Cherenkov Counter pt [Ge. V/c] Charmonium Spectroscopy: pp hc ηc γ Ks K π γ at 5. 609 Me. V/c Georg Schepers PANDA – meeting 18. September 2007 GSI

Endcap Cherenkov Counter Barrel DIRC 2σ 3. 5σ t DISC p [Ge. V/c] pt [Ge. V/c] Charmonium Spectroscopy: pp hc ηc γ Ks K π γ at 5. 609 Me. V/c Barrel DIRC 5σ pt [Ge. V/c] 6σ DISC Very Simplified Illustration of a Separation Power Distribution! Georg Schepers PANDA – meeting 18. September 2007 GSI

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 Georg Schepers PANDA – meeting 18. September 2007 GSI

Muon subgroup report • layout studies for muon id • background studies with PYTHIA • open questions

Benchmark channel: DY @ 14 Ge. V/c — ABianconi Drell - Yan Generator Focus on two Mdilepton ranges Low Mass 1. 1<Md<1. 5 Ge. V Medium Mass 1. 5<Md<2. 5 Ge. V

Barrel and endcap segmentation Endcap segmentation Barrel segmentation ? Background: dipions with the dimuon kinematics

Global PID Analysis • 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 Georg Schepers PANDA – meeting 18. September 2007 GSI

Conclusion and Outlook • 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 Georg Schepers PANDA – meeting 18. September 2007 GSI

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 ) To. F K. Peters Detectors Thanks for important input: M. Düren, K. Götzen, Th. Hennino, Marc Pelizaeus a. o. Georg Schepers PANDA – meeting 18. September 2007 GSI