Experimental check of the Gerasimov-Drell-Hearn sum rule for 1H

H Dutz; K Helbing; J Krimmer; T Speckner; G Zeitler; J Ahrens; S Altieri; J R M Annand; G Anton; H-J Arends; R Beck; A Bock; C Bradtke; A Braghieri; W v  Drachenfels; F Frommberger; M Godo; S Goertz; P Grabmayr; S Hasegawa; K Hansen; J Harmsen; E Heid; W Hillert; H Holvoet; N Horikawa; T Iwata; L Van Hoorebeke; N D'Hose; P Jennewein; B Kiel; F Klein; R Kondratiev; M Lang; B Lannoy; R Leukel; V Lisin; D Menze; W Meyer; T Michel; J Naumann; A Panzeri; P Pedroni; T Pinelli; I Preobrajenski; E Radtke; G Reicherz; C Rohlof; T Rostomyan; M Sauer; B Schoch; M Schumacher; G Tamas; A Thomas; R van de Vyver; W Weihofen; F Zapadtka; GDH Collaboration

doi:10.1103/PhysRevLett.93.032003

Experimental check of the Gerasimov-Drell-Hearn sum rule for 1H

Phys Rev Lett. 2004 Jul 16;93(3):032003. doi: 10.1103/PhysRevLett.93.032003. Epub 2004 Jul 16.

Affiliation

¹ Physikalisches Institut, Universität Bonn, D-53115 Bonn, Germany.

PMID: 15323817
DOI: 10.1103/PhysRevLett.93.032003

Abstract

For the first time we checked the fundamental Gerasimov-Drell-Hearn (GDH) sum rule for the proton experimentally in the photon energy range from 0.2-2.9 GeV with the tagged photon facilities at MAMI (Mainz) and ELSA (Bonn). New data of the doubly polarized total cross section difference are presented in the energy range from 1.6 to 2.9 GeV. The contribution to the GDH integral from 0.2-2.9 GeV yields [254+/-5(stat)+/-12(syst)] microb with negative contributions in the Regge regime at photon energies above 2.1 GeV. This trend supports the validity of the GDH sum rule.