First measurement of the gerasimov-drell-hearn sum rule for [formula presented] from 0.7 to 1.8 gev at elsa

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. HasegawaK. 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

2 Citations (Scopus)


To verify the fundamental Gerasimov-Drell-Hearn (GDH) sum rule for the first time experimentally, we measured the helicity dependent total photoabsorption cross section with circularly polarized real photons and longitudinally polarized nucleons in the photon energy range 0.68–1.82 GeV with the tagged photon facility at ELSA. The experiment was carried out with a [Formula presented] detection system, a circularly polarized tagged photon beam, and a frozen spin polarized proton target. The contribution to the GDH sum rule in this photon energy range is [Formula presented].

Original languageEnglish
JournalPhysical Review Letters
Issue number19
Publication statusPublished - 2003
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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