The GDH experiment at MAMI

Authors
Citation
A. Thomas, The GDH experiment at MAMI, NUCL PHYS A, 663, 2000, pp. 393C-396C
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
NUCLEAR PHYSICS A
ISSN journal
0375-9474 → ACNP
Volume
663
Year of publication
2000
Pages
393C - 396C
Database
ISI
SICI code
0375-9474(20000131)663:<393C:TGEAM>2.0.ZU;2-A
Abstract
An extensive program to perform the first experimental test of the fundamen tal Gerasimov-Drell-Hearn (GDH) sum rule has been started at the Mainz elec tron accelerator MAMI. The GDH-collaboration is measuring the helicity depe ndence of the photon nucleon interaction using the circularly polarized pho ton beam of the A2 tagging facility in the energy range from pi-production threshold up to 800 MeV. To provide longitudinally polarized protons and de uterons a frozen spin target has been integrated into the 4 pi-detector DAP HNE. We have finished the data taking period at MAMI for the proton in Augu st 1998. rn this paper first preliminary results for the total photoabsorpt ion cross section and the partial reaction channels will be shown.