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Nucleon resonances in omega photoproduction

Yong-seok Oh
(
- Taiwan, Inst. Phys.
)
,
Alexander I. Titov
(
- Dubna, JINR
)
,
T.S.H. Lee
(
- Argonne, PHY
)

Jun, 2000

18 pages

Published in:

Phys.Rev.C 63 (2001) 025201

e-Print:

nucl-th/0006057 [nucl-th]

DOI:

10.1103/PhysRevC.63.025201

View in:

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Abstract:

The role of the nucleon resonances (

N^*

) in

\omega

photoproduction is investigated by using the resonance parameters predicted by Capstick and Roberts [Phys. Rev. D {\bf 46}, 2864 (1992); {\bf 49}, 4570 (1994)]. In contrast with the previous investigations based on the

{SU}(6) \times {O}(3)

limit of the constituent quark model, the employed

N^* \to \gamma N

and

N^* \to \omega N

amplitudes include the configuration mixing effects due to the residual quark-quark interactions. The contributions from the nucleon resonances are found to be significant relative to the non-resonant amplitudes in changing the differential cross sections at large scattering angles and various spin observables. In particular, we suggest that a crucial test of our predictions can be made by measuring the parity asymmetry and beam-target double asymmetry at forward scattering angles.

photon p: exclusive reaction
photon: polarized beam
polarized target
omega(783): photoproduction
nucleon resonance: effect
spin: density matrix
nucleon resonance: parity
parity: asymmetry
spin: asymmetry
Feynman graph

References(47)

Figures(0)

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