First measurement of the Gerasimov-Drell-Hearn sum rule for 1H 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

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79 Citations (Scopus)


The Gerasimov-Drell-Hearn (GDH) experiment is carried out at two accelerators to cover a wide photon energy range. At MAMI (Mainz), the low energy part of the resonance region from 0.2 to 0.8 GeV was measured. With the experimental setup at the electron stretcher accelerator, the photon energy range from 0.68 to 2.9 GeV was covered. This paper presents the helicity dependence of the total photoabsorption cross section on the proton in the photon energy range from 0.68 to 1.82 GeV.

Original languageEnglish
Pages (from-to)192001/1-192001/5
JournalPhysical Review Letters
Issue number19
Publication statusPublished - Nov 7 2003
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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