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Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 1 Hadron Structure & Spectroscopy Experimental frontiers: High precision High intensity Theoretical symbiosis:

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Presentation on theme: "Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 1 Hadron Structure & Spectroscopy Experimental frontiers: High precision High intensity Theoretical symbiosis:"— Presentation transcript:

1 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 1 Hadron Structure & Spectroscopy Experimental frontiers: High precision High intensity Theoretical symbiosis: Effective field theories Lattice QCD Perturbative QCD HadronPhysics I3: 11 Research infrastructures 140 Institutions 2000 Physicists Celsius 1.3 GeV p Cooler Ring MAX-lab 0.25 GeV DA NE e +, e - Collider 16 MeV K L = GRAAL – ESRF 10 6 /s 1.5 GeV COMPASS – CERN μ +, μ -, hadrons L = PANDA – FAIR (GSI) 15 GeV anti – p L = Cooler Ring HERMES – DESY 27.6 GeV e +, e - L = COSY – FZ Jülich 2.5 GeV p Cooler Ring MAMI (Mainz) 1.5 GeV e, L = /s ELSA (Bonn) 3.5 GeV e, L = /s

2 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 2 Methodology Hadrons = strongly interacting particles Theory: Quantum Chromodynamics Exchange of mesons at nuclear physics energy scale Exchange of gluons at high energies Experiment: Scattering of high-energy light or leptons on hadron targets Observation of hadron excitation spectra

3 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 3 Lepton microscopy Beams Electrons Positrons Muons Photons Resolution Energy Accelerator Cooling Spectrometers Physics potential Polarised beams Polarised targets

4 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 4 Ba Ca Atom Nucleon Hadron spectroscopy

5 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 5 Mainz Microtron MAMI / GeV electrons

6 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 6 Global properties of nucleons & resonances: magnetic moments

7 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 7 HERMES - DESY Nucleon Spin Structure

8 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 8 The HERMES spectrometer 27.6 GeV e + /e - Recoil Detector, 2005

9 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 9 Hunt for wild QCD animals, Part I Pentaquarks Mass m = 1.53 GeV Intrinsic width = 17 MeV Significance 4.3 Deuteron Target

10 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 10 Proton spin ? ½ = ½ q + G + L q ~ 25% COMPASS 2006… HERMES Recoil 2005… Spin crisis EMC - CERN: q ~ 10% Spin generators: Quarks Valence quarks (uud) Sea quarks (q anti-q) Gluons (spin 1) Quark angular momentum Mathematically: Spin puzzle HERMES: q ~ 25%

11 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 11 Gluon polarization Photoproduction of high p T –hadron pairs Contributing diagrams: Corresponding asymmetries:

12 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 12 The COMPASS CERN Polarization: Beam: ~80% Target: Beam: 160 GeV µ µ/spill (4.8s/16.2s) Polarized target SM1 RICH ECal1 & Hcal1 Muon filter 1 SM2 MWPCs Micromegas &Drift chambers ECal2 & Hcal2 Muon filter 2 GEM & MWPCs SciFi GEM & MWPCs GEM & Straws Silicon SciFi Scintillating fibers ~50m

13 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 13 COMPASS Recoil Detector 12° 24° 4m ECAL0 2010

14 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 14 Hunt for wild QCD animals, Part II Hybrids & PANDA QED QCD Confinement Hybrids ? Glueballs ?

15 Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04 15 PANDA – FAIR in 2012 tracking of charged particles measurement and identification of γ, e±, μ±, π ±, K ±, p, anti-p high rate capability fast trigger scheme L = cm -2 s -1 p(anti-p) = GeV/c δp/p ~ (e cooling)


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