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Transcript 
Glasgow University
Nuclear Physics Group
Electron and Photon induced studies in
Nuclear & Hadron Physics
I J Douglas MacGregor
Group Members
5 Academic Staff:
Prof Guenther Rosner
(Chair NuPECC)
Prof Ralf Kaiser
Dr I J Douglas MacGregor (Chair IOP Nuclear & Particle Physics Division,
Secretary EPS Nuclear Physics Board)
Dr Dave Ireland (Chair IOP Nuclear Physics Group)
Dr Bjoern Seitz
11 Research Staff:
Dr John Annand
Dr David Hamilton
Dr Ken Livingston
Dr Gordon Hill
Dr Inti Lehmann
Dr Matthias Hoek
Dr Dan Protopopescu
Dr Tibor Keri
Dr Morgan Murray
Dr Guangliang Yang
Dr Bryan McKinnon
16 Research Students
5 Honorary Research Staff
2 Technical Staff
1 Secretary
Research Themes
Short-Range Nucleon Stucture
(e,e’pn) and (g,pN) measurements at MAXlab, Mainz A1, A2
and JLAB HallA, Hall B CLAS
• (γ,pp) reactions proceed via Δcurrents and Short Range
Correlations.
•
MEC are suppressed and FSI effects are expected to be small, simplifying the
interpretation of measurements.
Glasgow 2-Nucleon Knockout
projects
3He(e,e’pn),
Mainz A1, PRL 103 (2009) 152501
16O(e,e’pn), Mainz A1, EPJA 29 (2006) 261
12C(g ,pp), Mainz A2, data under analysis
pol
CLAS Data Mining Initiative, JLAB Hall B,
proposal for reanalysis of previously accumulated data.
Probing Cold Dense Nucelar Matter, Jlab Hall A,
Science 320 (2008) 1476
Nucleon Resonance Spectroscopy (Mainz A2 and CLAS):
Polarisation observables in pseudoscalar meson production
4 Complex amplitudes: 16 real polarization observables.
Complete measurement from 8 carefully chosen observables.
πN has high statistics
but in KY recoil is self-analysing
πN
recoil
targ
KY
γ
γ
targ
recoil
I. S. Barker, A. Donnachie, J. K. Storrow, Nucl. Phys. B95 347 (1975).
circ polarized photons
longitudinally polarized target
linearly polarized photons
transversely polarized target
Complete, and
over-determined
New Forms of Hadronic Matter:
Physics Programme of PANDA at
FAIR
Topics for Investigation
• Charmonium States
ƒ Positronium of QCD
ƒ Narrow states
ƒ Transition region
• Light - heavy quark
ƒ Spectrum NOT well
understood
• Findings at Bfactories
• Discussion on
interpretation
Topics for Investigation
• Charmed hybrids
ƒ Narrow states expected
ƒ Exotic quantum numbers - no mixing
ƒ Around 4 GeV/c2
• Glueballs above 3 GeV/c2
ƒ
ƒ
ƒ
ƒ
Few mesonic states
Smaller width than low states
Less mixing
Exotic states around 4 GeV/c2
Lattice QCD calculations by
Morningstar and Peardon;
PRD60 (1999) 034 509
Experimental Facility
• PANDA at HESR
ƒ Fixed target magnetic spectrometer experiment
Target Spectrometer
Forward Spectrometer
Beam
Dipole
Solenoid
Interaction
point
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