Eta photoproduction

Details Eta photoproduction Eta photoproduction

1998-02-20

arxiv.org/abs/nucl-th/9802064v1

PiN Newslett.14:70-78,1998

Physics

Nuclear Physics

Nuclear Theory

9 pages LATEX including 5 Figurs, Proc. of the GW/TJNAF Workshop on N* Physics, 1997, to be published in pi-N Newsletters

Scientific paper

We present a combined analysis of the new eta photoproduction data for total and differential cross sections, target asymmetry and photon asymmetry. Using basic assumptions, this allows a model-independent extraction of the $E_{2-}$ and $M_{2-}$ multipoles as well as resonance parameters of the $D_{13}(1520)$ state. At higher energy, we show that the photon asymmetry is extremely sensitive to small multipoles that are excited by photons in the helicity 3/2 state. These could be, e.g., the $F_{15}(1680)$, the $F_{17}(1990)$, or the $G_{17}(2190)$ resonances.

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