GRC Photonuclear Reactions 2008

• Took place Aug 10-15 at Tilton School, NH• >100 attendees from >50 different institutions• Contributors: JSA, NSF, Ohio State, • Anonymous contributor• Organizers: S. Jeschonnek, R. Ent, P. Pedroni

• Scope: detailed studies of the nucleon-nucleon interaction and few-body systems, structure of the nucleon itself and how such structure can be related to the underlying QCD dynamics of quarks and gluons

• Topics: current theoretical and experimental work on electron and photon scattering from nucleons and nuclei• 54 talks (3 by students, ~35% Jlab), 33 posters• All results shown are considered un-published – not allowed to be shown outside the conference

GRC 2008: List of Topics

• The Spin and Momentum Structure of Nucleons• semi-inclusive results from Jlab

• The Space-Momentum Structure of Protons and Neutrons• Interpretation of GPDs, double polarized VCS, DVCS from Jlab, Gep, Gen

• The Transverse Spin Structure of Protons/Pushing the Understanding of Nuclei• RHIC, COMPASS• Novel ion trap for electron scattering of short-lived unstable nuclei

• Advances in Theory• ADC/QCD entertaining comments, truncated moments

• Meson Production and Hadron Spectroscopy• Transition form factors, lattice

• Applications of Photonuclear Physics• Medical (Mainz and Hampton)• Radiocarbon dating and biblical history

Jlab Updates

• Hall A: • Gen, DVCS (+Hall B), SRC, few-body FF, photopion production,

4He(e,e’p)3H, photodisintegration

• Hall B: • BONUS, semi-inclusive DIS, transition form factors,

photodisintegration

• Hall C: • Gep, R on deuterium, 2-photon exchange, hard exclusive reactions

(+Hall B), nuclear EMC, x>1

Non-Jlab Updates• HERMES:

• PDFs, GPDs with recoil, TMD studies

• BLAST: • FF program

• Mainz: • doubly virtual VCS, coherent/incoherent π°

• COMPASS: • π polarizability, transverse spin

• RHIC: • transverse spin physics • new technique for a measurement of rare short-lived isotopes using

ion trapping in cavities with electron beams: possible use at JLab?

• S-Dalinac: • nuclear astrophysics

• MAX/LUND: • deuteron Compton scattering

Theory Developments

• Mainz: Vanderhaeghen, Tiator• interpretation of GPDs, N* properties

• Washington: Miller• nucleon structure

• Lisbon: Ramalho• s-wave models of N and Delta

• Ghent: Ryckebusch• nuclear transparencies

• Giessen: Leupold• in-medium hadron modification

• Jlab: Radyushkin, Psaker, Dudek• AdS/QCD, truncated moments of structure functions, meson spectroscopy on the lattice

arXiv:0807.4537

Non-traditional Developments

• Radiocarbon Dating and Biblical History• Conventional archaeology chronology uses a combination of

excavation (pottery etc) assuming that Biblical texts provide a good road map

• Issue: conventional archaeology chronology may be off by more than a century

• Using radiocarbon dating (carbon-14 sampling) introduces a modern and more reliable technique into the field

• Medical Applications:• Medical Imaging• Proton radiotherapy