Helicity dependence of the (gamma)over-right-arrow (p)over-right-arrow > n pi(+) pi(0) reaction in the second resonance region

ISSN
0370-2693
Date Issued
2003
Author(s)
Ahrens, J.
Altieri, S.
Annand, JRM
Anton, G.
Arends, H. J.
Aulenbacher, K.
Beck, R.
Bradtke, C.
Braghieri, A.
Degrande, N.
D'Hose, N.
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.
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.
Rostomyan, T.
Rovelli, C.
Rychbosch, 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.
DOI
10.1016/S0370-2693(02)03008-3
Abstract
The helicity dependence of the total cross section for the (γ) over right arrow(p) over right arrownpi(+) pi(0) reaction has been measured for the first time at incident photon energies from 400 to 800 MeV The measurement was performed with the large acceptance detector DAPHNE at the tagged photon beam facility of the MAMI accelerator in Mainz. This channel is found to be excited predominantly when the photon and proton have a parallel spin orientation, due to the intermediate production of the D-13 resonance. (C) 2002 Elsevier Science B.V. All rights reserved.
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