Problems with extraction of the nucleon to Delta (1232) photonic amplitudes

Davidson, R.M.; Mukhopadhyay, Nimai C.; Pierce, M.S.; Arndt, R.A.; Strakovsky, I.I.; Workman, R.L.

doi:10.1103/PhysRevC.59.1059

Problems with extraction of the nucleon to Delta (1232) photonic amplitudes

R.M. Davidson
(
- Rensselaer Poly.
)
,
Nimai C. Mukhopadhyay
(
- Rensselaer Poly.
)
,
M.S. Pierce
(
- Rensselaer Poly.
)
,
R.A. Arndt
(
- Virginia Tech.
)
,
I.I. Strakovsky
(
- Virginia Tech. and
- George Washington U.
)

Oct, 1998

7 pages

Published in:

Phys.Rev.C 59 (1999) 1059-1063

e-Print:

nucl-th/9810038 [nucl-th]

DOI:

10.1103/PhysRevC.59.1059

Report number:

RPI-N123-98A

View in:

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Abstract:

We investigate the model dependence and the importance of choice of database in extracting the {\it physical} nucleon-Delta(1232) electromagnetic transition amplitudes, of interest to QCD and baryon structure, from the pion photoproduction observables. The model dependence is found to be much smaller than the range of values obtained when different datasets are fitted. In addition, some inconsistencies in the current database are discovered, and their affect on the extracted transition amplitudes is discussed.

photon nucleon: exclusive reaction
pi: photoproduction
partial wave analysis: multipole
nucleon: form factor
Delta(1232): form factor
decay: form factor
numerical calculations: interpretation of experiments

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