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Helicity amplitudes A1/2 and A3/2 for the D13(1520) resonance obtained from the gamma-->p-->-->ppi(0) Reaction |
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| Authors: | Ahrens J Altieri S Annand J R M Anton G Arends H-J Aulenbacher K Beck R Bradtke C Braghieri A Degrande N 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 K Holvoet H Van Hoorebeke L Horikawa N Iwata T Jahn O Jennewein P Kageya T Kamalov S 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 W Michel T Naumann J Panzeri A Pedroni P Pinelli T Preobrajenski I Radtke E Reichert E Reicherz G Rohlof Ch Rosner G Ryckbosch D Sauer M Schoch B Schumacher M Seitz B |
| Affiliation: | Institut für Kernphysik, Universit?t Mainz, D-55099 Mainz, Germany. |
| Abstract: | The helicity dependence of the gamma-->p-->-->ppi(0) reaction has been measured for the first time in the photon-energy range from 550 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. These data are predominantly sensitive to the D13(1520) resonance and are used to determine its helicity amplitudes. |
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