First measurement of the Gerasimov-Drell-Hearn sum rule for 1H from 0.7 to 1.8 GeV at ELSA

Dutz, H. et al. (2003) First measurement of the Gerasimov-Drell-Hearn sum rule for 1H from 0.7 to 1.8 GeV at ELSA. Physical Review Letters, 91(19), p. 192001. (doi: 10.1103/PhysRevLett.91.192001)

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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 4π 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 [49.9±2.4(stat)±2.2(syst)]   μb.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Annand, Dr John
Authors: Dutz, H., Helbing, K., Krimmer, J., Speckner, T., Zeitler, G., Ahrens, J., Altieri, S., Annand, J.R.M., Anton, G., Arends, H.J., Beck, R., Bock, A., Bradtke, C., Braghieri, A., von Drachenfels, W., Frommberger, F., Godo, M., Goertz, S., Grabmayr, P., Hasegawa, S., Hansen, K., Harmsen, J., Heid, E., Hillert, W., Holvoet, H., Horikawa, N., Iwata, T., Hoorebeke, L.V., dHose, N., Jennewein, P., Kiel, B., Klein, F., Kondratiev, R., Lang, M., Lannoy, B., Leukel, R., Lisin, V., Menze, D., Meyer, W., Michel, T., Naumann, J., Panzeri, A., Pedroni, P., Pinelli, T., Preobrajenski, I., Radtke, E., Reicherz, G., Rohlof, C., Rostomyan, T., Sauer, M., Schoch, B., Schumacher, M., Tamas, G., Thomas, A., van de Vyver, R., Weihofen, W., and Zapadtka, F.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN (Online):1079-7114
Published Online:04 November 2003

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