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

H Dutz, K Helbing, J Krimmer, T Speckner, G Zeitler, J Ahrens, S Altieri, JRM Annand, G Anton, HJ Arends, R Beck, A Bock, C Bradtke, A Braghieri, W von Drachenfels, F Frommberger, M Godo, S Goertz, P Grabmayr, S HasegawaKurt 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

Research output: Contribution to journalArticlepeer-review

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)] mub with negative contributions in the Regge regime at photon energies above 2.1 GeV. This trend supports the validity of the GDH sum rule.
Original languageEnglish
JournalPhysical Review Letters
Volume93
Issue number3
DOIs
Publication statusPublished - 2004

Subject classification (UKÄ)

  • Physical Sciences
  • Natural Sciences

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