Spin Asymmetry and Gerasimov-Drell-Hearn Sum Rule for the Deuteron

Details Spin Asymmetry and Gerasimov-Drell-Hearn Sum Rule for the Deuteron Spin Asymmetry and Gerasimov-Drell-Hearn Sum Rule for the Deuteron

2004-07-20

arxiv.org/abs/nucl-th/0407058v1

Phys.Rev.Lett. 93 (2004) 202301

Physics

Nuclear Physics

Nuclear Theory

4 pages, 5 figures, revtex4

Scientific paper

10.1103/PhysRevLett.93.202301

An explicit evaluation of the spin asymmetry of the deuteron and the associated GDH sum rule is presented which includes photodisintegration, single and double pion and eta production as well. Photodisintegration is treated with a realistic retarded potential and a corresponding meson exchange current. For single pion and eta production the elementary operator from MAID is employed whereas for double pion production an effective Lagrangean approach is used. A large cancellation between the disintegration and the meson production channels yields for the explicit GDH integral a value of 27.31 $\mu$b to be compared to the sum rule value 0.65 $\mu$b.

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