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Helicity-dependent photoabsorption cross sections on the nucleon | | R.A. Arndt
; W.J. Briscoe
; I.I. Strakovsky
; R.L. Workman
; | | Date: |
29 Aug 2005 | | Subject: | nucl-th hep-ex hep-ph nucl-ex | | Affiliation: | GWU | | Abstract: | We examine the energy dependence of single-meson photoproduction as it contributes to the Gerasimov-Drell-Hearn (GDH) sum rule. For photon energies above approximately 1 GeV, through the full resonance region, this contribution dominates the proton sum rule integral. Over the same energy region, our single-pion contribution to the neutron sum rule also qualitatively follows a recent set of GDH data. The predicted neutral-pion contribution to the neutron sum rule is nearly zero above 1 GeV in this result. The SAID and Mainz (MAID) results are very different for a number of observables over this energy region. | | Source: | arXiv, nucl-th/0508064 | | Services: | Forum | Review | PDF | Favorites | |
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