First measurement of the Gerasimov-Drell-Hearn integral for H-1 from 200 to 800 MeV

Ahrens, Jürgen; Altieri, S.; Annand, J. R. M.; Anton, G.; Arends, Hans-Jürgen; Aulenbacher, Kurt; Beck, Reinhard; Bradtke, C.; Braghieri, A.; Degrande, N.; Dutz, H.; Goertz, S.; Grabmayr, P.; Hansen, K.; Harmsen, J.; Harrach, Dietrich von; Hasegawa, S.; Hasegawa, T.; Heid, Erik; Helbing, K.; Holvoet, H.; Horikawa, N.; Hose, N. d&#039; Iwata, T.; Jennewein, Peter; Kageya, T.; Kiel, B.; Klein, F.; Kondratiev, R.; Kossert, K.; Krimmer, J.; Lang, Michael; Lannoy, B.; Leukel, R.; Lisin, V.; Matsuda, T.; McGeorge, J. C.; Meier, A.; Menze, D.; Meyer, W.; Michel, T.; Naumann, J.; Owens, R. O.; Panzeri, A.; Pedroni, P.; Pinelli, T.; Preobrajenski, Ilya; Radtke, E.; Reichert, E.; Reicherz, G.; Rohlof, C.; Ryckbosch, D.; Sadiq, F.; Sauer, M.; Schoch, B.; Schumacher, M.; Seitz, B.; Speckner, T.; Steigerwald, M.; Takabayashi, N.; Tamas, G.; Thomas, Andreas; Van de Vyver, R.; Van Hoorebeke, L.; Wakai, A.; Weihofen, W.; Wissmann, F.; Zapadtka, F.; Zeitler, G.

First measurement of the Gerasimov-Drell-Hearn integral for H-1 from 200 to 800 MeV

Abstract

A direct measurement of the helicity dependence of the total photoabsorption cross section an the proton was carried out at MAMI (Mainz) in the energy range 200 detection system, a circularly polarized. tagged photon beam, and a frozen spin target. The contributions to the Gerasimov-Drell-Hearn sum rule and to the forward spin polarizability gamma (0) determined from the data are 226 +/- 5(stat) +/- 12(syst) mub and -187 +/- 8(stat) +/- 10(syst) x 10(-6) fm(4), respectively, for 200 < 800 MeV

Similar works

Full text

Available Versions

Gutenberg Open

oai:publications.UB.Uni-Mainz....

Last time updated on 07/05/2019