The Q2-dependence of the generalized GDH integral for the proton

Seitz, B. (2001) The Q2-dependence of the generalized GDH integral for the proton. In: Fourteenth International Spin Physics Symposium, SPIN2000, Osaka, Japan, 16-21 Oct 2001, p. 878. (doi:10.1063/1.1384184)

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Publisher's URL: http://dx.doi.org/10.1063/1.1384184

Abstract

The Q2 -dependence of the generalized GDH integral for the proton has been measured in the range 1.2 GeV2<Q2<12 GeV2 by scattering longitudinally polarized positrons on a longitudinally polarized hydrogen gas target. HERMES has previously published a measurement of the deep inelastic portion of the generalized GDH integral. New results for the full integral were shown, including the resonance contribution for W<2 GeV. The contributions of the nucleon resonance and deep inelastic regions have been evaluated separately. The latter has been found to dominate for Q2>3 GeV2. The total integral shows no significant deviation from a 1/Q2 behavior in the measured Q2 range indicating no effects due to either nucleon resonance excitations or non-leading twist. The combination of the data in the resonance and DIS regions provides the first measurement of the Q2 -dependence of the generalized GDH integral.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Seitz, Dr Bjoern
Authors: Seitz, B.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:AIP Conference Proceedings
ISSN:0094-243X
ISSN (Online):1551-7616

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