# Quark-Hadron Duality in Spin Structure Functions $g_1^p$ and $g_1^d$

Abstract : New measurements of the spin structure functions of the proton and deuteron g1p(x,Q2) and g1d(x,Q2) in the nucleon resonance region are compared with extrapolations of target-mass-corrected next-to-leading-order (NLO) QCD fits to higher energy data. Averaged over the entire resonance region (W<2 GeV), the data and QCD fits are in good agreement in both magnitude and Q2 dependence for Q2>1.7 GeV2. This global duality appears to result from cancellations among the prominent local resonance regions: in particular strong sigma{3/2} contributions in the Delta(1232) region appear to be compensated by strong sigma{1/2} contributions in the resonance region centered on 1.5 GeV. These results are encouraging for the extension of NLO QCD fits to lower W and Q2 than have been used previously.
Document type :
Journal articles
Domain :

http://hal.in2p3.fr/in2p3-00147207
Contributor : Dominique Girod <>
Submitted on : Wednesday, May 16, 2007 - 10:55:15 AM
Last modification on : Wednesday, April 21, 2021 - 8:36:02 AM

### Citation

P.E. Bosted, K. V. Dharmawardane, G. E. Dodge, T.A. Forest, S. E. Kuhn, et al.. Quark-Hadron Duality in Spin Structure Functions $g_1^p$ and $g_1^d$. Physical Review C, American Physical Society, 2007, 75, pp.035203. ⟨10.1103/PhysRevC.75.035203⟩. ⟨in2p3-00147207⟩

Record views