Measurement of helicity-dependent photoabsorption cross sections on the neutron from 815 to 1825 MeV

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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43 Citations (Scopus)

Abstract

Helicity-dependent total photoabsorption cross sections on the deuteron have been measured for the first time at ELSA (Bonn) in the photon energy range from 815 to 1825 MeV. Circularly polarized tagged photons impinging on a longitudinally polarized LiD target have been used together with a highly efficient 4π detector system. The data around 1 GeV are not compatible with predictions from existing multipole analyses. From the measured energy range an experimental contribution to the GDH integral on the neutron of [33.9 ± 5.5(stat) ± 4.5(syst)] μb is extracted.

Original languageEnglish
Article number162001
JournalPhysical Review Letters
Volume94
Issue number16
DOIs
Publication statusPublished - Apr 29 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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