1. Measurement of the G asymmetry for the γp↦Nπ channels in the Δ(1232) resonance region
- Author
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J. R. M. Annand, J. Ahrens, E. Heid, R. Beck, G. Rosner, Naoaki Horikawa, St. Goertz, A. Braghieri, G. Reicherz, R. Van de Vyver, R. Kondratiev, P. Grabmayr, P. Jennewein, Saverio Altieri, J. C. McGeorge, B. Lannoy, J. Krimmer, S. Hasegawa, O. Jahn, A. Panzeri, I. Preobrajenski, H. Dutz, F. Zapadtka, M. Lang, N. d'Hose, Dirk Ryckbosch, L. Van Hoorebeke, W. Meyer, K. Livingston, T. Pinelli, Martin Schumacher, H. J. Arends, B. Seitz, M. Rost, G. Tamas, H. Holvoet, Anthony W. Thomas, Takahiro Iwata, P. Pedroni, T. Rostomyan, and Th. Walcher
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Proton ,media_common.quotation_subject ,Nuclear Theory ,Hadron ,Resonance ,Observable ,Asymmetry ,Nuclear physics ,Physics::Accelerator Physics ,Nuclear fusion ,Nuclear Experiment ,Nucleon ,Microtron ,media_common - Abstract
The G asymmetry of the γp↦Nπ reaction has been measured for the first time for Eγ = 340±14 MeV. This observable, for which very scarce published data exist, plays an important role to disentangle the contributions of the various nucleon resonances. The experiment, performed at the Mainz microtron MAMI, used a 4π-detector system, a linearly polarized, tagged photon beam, and a longitudinally polarized proton target.
- Published
- 2005