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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 DANE e + , e - Collider 16 MeV K L = 10 32 GRAAL – ESRF 10 6 /s 1.5 GeV COMPASS – CERN μ + , μ - , hadrons L = 10 32 PANDA – FAIR (GSI) 15 GeV anti – p L = 10 32 Cooler Ring HERMES – DESY 27.6 GeV e + , e - L = 10 32 COSY – FZ Jülich 2.5 GeV p Cooler Ring MAMI (Mainz) 1.5 GeV e, L = 10 38 10 8 /s ELSA (Bonn) 3.5 GeV e, L = 10 34 10 7 /s

Hadron Structure & Spectroscopy

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Experimental frontiers: High precision High intensity Theoretical symbiosis: Effective field theories Lattice QCD Perturbative QCD HadronPhysics I3: 11 Research infrastructures 140 Institutions 2000 Physicists. Hadron Structure & Spectroscopy. Celsius 1.3 GeV p Cooler Ring. - PowerPoint PPT Presentation

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Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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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

Celsius1.3 GeV p

Cooler RingMAX-lab0.25 GeV

DANEe+, e- Collider

16 MeV KL = 1032

GRAAL – ESRF106/s 1.5 GeV

COMPASS – CERNμ+, μ-, hadrons

L = 1032

PANDA – FAIR (GSI)15 GeV anti – p

L = 1032

Cooler Ring

HERMES – DESY27.6 GeV e+, e-

L = 1032

COSY – FZ Jülich2.5 GeV p

Cooler Ring

MAMI (Mainz)1.5 GeV e, L = 1038

108/s

ELSA (Bonn)3.5 GeV e, L = 1034

107/s

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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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

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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Lepton microscopy

Beams Electrons Positrons Muons Photons

Resolution Energy Accelerator Cooling Spectrometers

Physics potential Polarised beams Polarised targets

Nuc le us

Q ua rk

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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Ba Ca

Atom Nucleon

Hadron spectroscopy

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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Mainz Microtron MAMI

2006

2004/6

2006

2006

1.5 GeV electrons

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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Global properties of nucleons & resonances: magnetic moments

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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HERMES - DESY

Nucleon Spin Structure

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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The HERMES spectrometer

27.6 GeV e+/e-

Recoil Detector, 2005

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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Hunt for wild QCD animals, Part I Pentaquarks

Mass m = 1.53 GeVIntrinsic width = 17 MeV

Significance 4.3

Deuteron Target

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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Proton spin ?

½ = ½ q + G + Lq

~ 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%

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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0AVMD||

q

ΔqADIS

|| q

ΔqAQCDC

|| G

ΔGAPGF

||

Gluon polarization Photoproduction of high

pT –hadron pairs →

Contributing diagrams:

Corresponding

asymmetries:

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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The COMPASS experiment @ CERN

Polarization:• Beam: ~80%• Target:<50%>

Beam: 160 GeV µ+

2 . 108 µ/spill (4.8s/16.2s)

Polarizedtarget

SM1RICH

ECal1 & Hcal1

Muon filter 1

SM2

MWPCs

Micromegas &Drift chambers

ECal2 & Hcal2

Muon filter 2

GEM & MWPCs

SciFi

GEM & MWPCs

GEM & Straws

SiliconSciFi Scintillating

fibers

~50m

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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COMPASS Recoil Detector

12°

24°

4m

ECAL0

2010

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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Hunt for wild QCD animals, Part II Hybrids & Glueballs @ PANDA

QED QCD

Confinement Hybrids ?

Glueballs ?

Günther Rosner EUROHORC/NuPECC, Paris, 29/11/04

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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 = 2 10⋅ 32 cm-2s-1

p(anti-p) = 1.5 - 15 GeV/c δp/p ~ 10-5 (e cooling)