First measurement of the Gerasimov-Drell-Hearn integral for H-1 from 200 to 800 MeV - art. no. 022003

Citation
J. Ahrens et al., First measurement of the Gerasimov-Drell-Hearn integral for H-1 from 200 to 800 MeV - art. no. 022003, PHYS REV L, 8702(2), 2001, pp. 2003-NIL_23
Citations number
38
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
8702
Issue
2
Year of publication
2001
Pages
2003 - NIL_23
Database
ISI
SICI code
0031-9007(20010709)8702:2<2003:FMOTGI>2.0.ZU;2-L
Abstract
A direct measurement of the helicity dependence of the total photoabsorptio n cross section an the proton was carried out at MAMI (Mainz) in the energy range 200 < E-<gamma> < 800 MeV. The experiment used a 4<pi> detection sys tem, a circularly polarized. tagged photon beam, and a frozen spin target. The contributions to the Gerasimov-Drell-Hearn sum rule and to the forward spin polarizability gamma (0) determined from the data are 226 +/- 5(stat) +/- 12(syst) mub and -187 +/- 8(stat) +/- 10(syst) x 10(-6) fm(4), respecti vely, for 200 < E-<gamma> < 800 MeV.