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Ahrens J, Altieri S, Annand JRM, Anton G, Arends HJ, 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 JC, 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 C, Rosner G, Ryckbosch D, Sauer M, Schoch B, Schumacher M, Seitz B, Speckner T, Takabayashi N, Tamas G, Thomas A, Tiator L, Van Vyver R, Wakai A, Weihofen W, Wissmann F, Zapadtka F, Zeitler G. Helicity amplitudes A1/2 and A3/2 for the D13(1520) resonance obtained from the gamma-->p-->-->ppi(0) Reaction. Phys Rev Lett 2002; 88:232002. [PMID: 12059355 DOI: 10.1103/physrevlett.88.232002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2002] [Indexed: 05/23/2023]
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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Affiliation(s)
- J Ahrens
- Institut für Kernphysik, Universität Mainz, D-55099 Mainz, Germany
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