First measurement of the helicity-dependent (gamma)over-right-arrow(p)over-right-arrow -> p eta differential cross-section
2003 | journal article. A publication with affiliation to the University of Göttingen.
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First measurement of the helicity-dependent (gamma)over-right-arrow(p)over-right-arrow -> p eta differential cross-section
Ahrens, J.; Altieri, S.; Annand, J.; Anton, G.; Arends, H. J.; Aulenbacher, K. & Beck, R. et al. (2003)
The European Physical Journal A, 17(2) pp. 241-244. DOI: https://doi.org/10.1140/epja/i2002-10153-2
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Details
- Authors
- Ahrens, J.; Altieri, S.; Annand, JRM; Anton, G.; Arends, H. J.; Aulenbacher, K.; Beck, R.; Bradtke, C.; Braghieri, A.; d'Hose, N.; Drechsel, D.; Dutz, H.; Goertz, S.; Grabmayr, P.; Hansen, K.; Harmsen, J.; von Harrach, D.; Hasegawa, S.; Hasegawa, T.; Heid, E.; Helbing, Krister; Holvoet, H.; van Hoorebeke, L.; Horikawa, N.; Iwata, T.; Jahn, Olaf; Jennewein, P.; Kageya, T.; Kiel, B.; Klein, F.; Kondratiev, R.; Kossert, K.; Krimmer, J.; Lang, M.; Lannoy, B.; Leukel, R.; Lisin, V.; Matsuda, T.; McGeorge, J. C.; Meier, A.; Menze, D.; Meyer, Werner; Michel, Tanja Maria; Naumann, J.; Panzeri, A.; Pedroni, P.; Pinelli, T.; Preobrajenski, I.; Radtke, E.; Reichert, E.; Reicherz, G.; Rohlof, C.; Rosner, G.; Ryckbosch, D.; Schoch, B.; Schumacher, M.; Seitz, Bjoern; Speckner, T.; Takabayashi, N.; Tamas, Gabor; Thomas, Andy; van de Vyver, R.; Wakai, A.; Weihofen, W.; Wissmann, F.; Zapadtka, F.; Zeitler, G.
- Abstract
- The helicity dependence of the (gamma) over right arrow(p) over right arrow -+ peta reaction has been measured for the first time at a center-of-mass angle theta(eta) = 70degrees in the photon energy range from 780 MeV to 790 MeV. The experiment, performed at the Mainz microtron MAMI, used a 4pi-detector system, a circularly polarized, tagged photon beam. and a longitudinally polarized frozen-spin target. The helicity 3/2 cross-section is found to be small and the results for helicity 1/2 agree with predictions from the MAID analysis.
- Issue Date
- 2003
- Status
- published
- Publisher
- Springer
- Journal
- The European Physical Journal A
- ISSN
- 1434-601X; 1434-6001
