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Spin asymmetry and GDH sum rule for real and virtual photons for the deuteron | | H. Arenhövel
; A. Fix
; M. Schwamb
; | | Date: |
8 Sep 2004 | | Subject: | nucl-th | | Abstract: | An explicit evaluation of the spin asymmetry of the deuteron and the associated GDH sum rule is presented which includes disintegration, single and double pion and eta production. For the GDH integral a large cancellation is found between the disintegration channel and the meson production channels. Furthermore, first results for the contribution of the disintegration channel to the generalized GDH integral at constant four-momentum transfer reveal a dominance of the isovector M1 transition to the $^1$S$_0$-state near threshold resulting in a negative contribution with a minimum around $Q^2approx 0.2$ fm$^{-2}$ which is driven by the nucleon anomalous isovector magnetic moment. | | Source: | arXiv, nucl-th/0409015 | | Services: | Forum | Review | PDF | Favorites | |
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