Helicity amplitudes A1/2 and A3/2 for the D13(1520) resonance obtained from the gamma-->p-->-->ppi(0) Reaction

J Ahrens; S Altieri; J R M Annand; G Anton; H-J Arends; K Aulenbacher; R Beck; C Bradtke; A Braghieri; N Degrande; N D'Hose; D Drechsel; H Dutz; S Goertz; P Grabmayr; K Hansen; J Harmsen; D Von Harrach; S Hasegawa; T Hasegawa; E Heid; K Helbing; H Holvoet; L Van Hoorebeke; N Horikawa; T Iwata; O Jahn; P Jennewein; T Kageya; S Kamalov; B Kiel; F Klein; R Kondratiev; K Kossert; J Krimmer; M Lang; B Lannoy; R Leukel; V Lisin; T Matsuda; J C McGeorge; A Meier; D Menze; W Meyer; T Michel; J Naumann; A Panzeri; P Pedroni; T Pinelli; I Preobrajenski; E Radtke; E Reichert; G Reicherz; Ch Rohlof; G Rosner; D Ryckbosch; M Sauer; B Schoch; M Schumacher; B Seitz; T Speckner; N Takabayashi; G Tamas; A Thomas; L Tiator; R Van Vyver; A Wakai; W Weihofen; F Wissmann; F Zapadtka; G Zeitler

doi:10.1103/PhysRevLett.88.232002

Helicity amplitudes A1/2 and A3/2 for the D13(1520) resonance obtained from the gamma-->p-->-->ppi(0) Reaction

Phys Rev Lett. 2002 Jun 10;88(23):232002. doi: 10.1103/PhysRevLett.88.232002. Epub 2002 May 24.

Authors

J Ahrens¹, S Altieri, J R M Annand, G Anton, H-J Arends, K Aulenbacher, R Beck, C Bradtke, A Braghieri, N Degrande, N D'Hose, D Drechsel, H Dutz, S Goertz, P Grabmayr, K Hansen, J Harmsen, D Von Harrach, S Hasegawa, T Hasegawa, E Heid, K Helbing, H Holvoet, L Van Hoorebeke, N Horikawa, T Iwata, O Jahn, P Jennewein, T Kageya, S Kamalov, B Kiel, F Klein, R Kondratiev, K Kossert, J Krimmer, M Lang, B Lannoy, R Leukel, V Lisin, T Matsuda, J C McGeorge, A Meier, D Menze, W Meyer, T Michel, J Naumann, A Panzeri, P Pedroni, T Pinelli, I Preobrajenski, E Radtke, E Reichert, G Reicherz, Ch Rohlof, G Rosner, D Ryckbosch, M Sauer, B Schoch, M Schumacher, B Seitz, T Speckner, N Takabayashi, G Tamas, A Thomas, L Tiator, R Van Vyver, A Wakai, W Weihofen, F Wissmann, F Zapadtka, G Zeitler

Affiliation

¹ Institut für Kernphysik, Universität Mainz, D-55099 Mainz, Germany.

PMID: 12059355
DOI: 10.1103/PhysRevLett.88.232002

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.