Theory of eta photoproduction and electroproduction - INSPIRE

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Theory of eta photoproduction and electroproduction

Nimai C. Mukhopadhyay
(
- Rensselaer Poly.
)
,
J.F. Zhang
(
- Rensselaer Poly.
)
,
M. Benmerrouche
(
- Saskatchewan U.
)

Dec, 1996

9 pages

Part of N* physics. Proceedings, 4th CEBAF/INT Workshop, Seattle, USA, September 9-13, 1996, physics* 217-225

Contribution to:

4th CEBAF / INT Workshop on N* Physics, physics* 217-225

e-Print:

nucl-th/9612061 [nucl-th]

Report number:

RPI-96-N112

View in:

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Abstract:

We analyze the available data on eta photo- and electroproduction, around W1535 MeV, in the framework of the effective Lagrangian approach, and extract, in a nearly model-independent fashion, the electrostrong amplitude for the gamma+N--> N*(1535)--> N+eta processes. Quark model approaches are shown to be quite inadequate to explain this property at all Q~2. In particular, at high Q~2, the extracted amplitude falls much slower than the predictions of the quark model, as a function of Q~2, a situation similar to the electroexcitation and decay of Delta(1232). A QCD explanation of these observations is urgently needed.

talk: Seattle 1996/09/09
electron nucleon: exclusive reaction
photon nucleon: exclusive reaction
eta: electroproduction
eta: photoproduction
effective Lagrangian
N(1535): photoproduction
N(1535): hadronic decay
Feynman graph
angular distribution

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Figures(0)

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