Unitary theory of the deuteron photodisintegration

Tanabe, H.; Ohta, K.

doi:10.1103/PhysRevC.40.1905

Unitary theory of the deuteron photodisintegration

H. Tanabe
(
- Mainz U., Inst. Phys.
)
,
K. Ohta
(
- Tokyo U.
)

1989

18 pages

Published in:

Phys.Rev.C 40 (1989) 1905-1922

DOI:

10.1103/PhysRevC.40.1905

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Abstract: (APS)

The deuteron photodisintegration in the Δ-resonance region is calculated within a unitary theory of the NN-NΔ-πNN system coupled to the photon. The photoexcitation amplitude of the Δ is deduced from the M1+((3/2) pion photoproduction amplitude consistently with its background term and the πN interaction. The NN-NΔ transition amplitude is obtained from the coupled equations for the NN-NΔ-πNN system. The one-pion-exchange currents as well as the normal single-nucleon current are included. The polarization parameters are reproduced quantitatively, but the cross section is slightly underestimated. Comparison of our results with those of the NN-NΔ coupled-channel model is made. Effects of relativistic corrections and gauge-invariance constraints are discussed.

deuteron: photofission
unitarity
three-body problem
nucleon nucleon: interaction
interaction: nucleon nucleon
Delta(1232): production
production: Delta(1232)
pi nucleon: interaction
interaction: pi nucleon
partial wave analysis: coupled channel

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