The helicity amplitudes A(1/2) and A(3/2) for the D13(1520) resonance obtained from the gamma p --> p pi0
- J. Ahrens
- 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
- P. Pedroni
- I. Preobrajenski
- E. Radtke
- E. Reichert
- G. Reicherz
- C.h. 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
- ALTIERI, SAVERIO
- PANZERI, ALESSANDRA
- PINELLI, TAZIO
Publication date
January 2002
DOIAbstract
The helicity dependence of the (γ) over right arrow(p) over right arrow →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 D-13(1520) resonance and are used to determine its helicity amplitudes
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