|
|
 |
| |
|
|
|
Contribution of Coherent Neutral-Pion Photoproduction Channel to the Gerasimov-Drell-Hearn Sum Rule for the Deuteron |
|
|
|
PP: 321-334 |
|
|
|
Author(s) |
|
|
|
E. M. Darwish,
M. Y. Hussein,
|
|
|
|
Abstract |
|
|
| The helicity dependence of the ~° ~d ! ¼0d reaction channel is studied for incident photon
energies from threshold up to the¢(1232)-resonance using an enhanced elementary
pion photoproduction operator and a realistic high-precision potential for the deuteron
wave function. The doubly polarized total cross sections for parallel and antiparallel
helicity states are predicted. Then the contribution to the deuteron spin asymmetry is
calculated. In addition, the contribution to the Gerasimov-Drell-Hearn (GDH) integral
is evaluated by explicit integration up to a photon lab-energy of 350 MeV. The sensitivity
of the results to the elementary pion photoproduction amplitude and the potential
model used for the deuteron wave function is also investigated. Considerable dependence
of the results on both the elementary amplitude and the deuteron wave function is
found. We expect that these results may be useful to interpret the recent measurements
from A2 and GDH@MAMI Collaborations. |
|
|
|
|
|
|
|
