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New measurements of the spin structure functions of the proton and deuteron g(1)(p)(x,Q(2)) and g(1)(d)(x,Q(2)) 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 Q(2) dependence for Q(2 >)1.7 GeV2/c(2). 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 Q(2) than have been used previously

physical review. c. nuclear physics/physical review. c, nuclear physics

Quark-hadron duality in spin structure functions<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msubsup><mml:mi>g</mml:mi><mml:mrow><mml:mn>1</mml:mn></mml:mrow><mml:mrow><mml:mi>p</mml:mi></mml:mrow></mml:msubsup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msubsup><mml:mi>g</mml:mi><mml:mrow><mml:mn>1</mml:mn></mml:mrow><mml:mrow><mml:mi>d</mml:mi></mml:mrow></mml:msubsup></mml:mrow…

Quark-hadron duality in spin structure functionsg1pandg1d