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Measurements of the $Q^2$ dependence of the proton and neutron spin structure functions $g^p_1$ and $g^n_1$
- Source :
- Physics Letters B, Physics Letters B, 2000, 493, pp.19-28, Physics Letters B, Elsevier, 2000, 493, pp.19-28
- Publication Year :
- 2000
- Publisher :
- HAL CCSD, 2000.
-
Abstract
- he structure functions g1p and g1n have been measured over the range 0.014 < x < 0.9 and 1 < Q2 < 40 GeV2 using deep-inelastic scattering of 48 GeV longitudinally polarized electrons from polarized protons and deuterons. We find that the Q2 dependence of g1p (g1n) at fixed x is very similar to that of the spin-averaged structure function F1p (F1n). From a NLO QCD fit to all available data we find $\Gamma_1^p - \Gamma_1^n =0.176 \pm 0.003 \pm 0.007$ at Q2=5 GeV2, in agreement with the Bjorken sum rule prediction of 0.182 \pm 0.005.
- Subjects :
- [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Subjects
Details
- Language :
- English
- ISSN :
- 03702693
- Database :
- OpenAIRE
- Journal :
- Physics Letters B, Physics Letters B, 2000, 493, pp.19-28, Physics Letters B, Elsevier, 2000, 493, pp.19-28
- Accession number :
- edsair.dedup.wf.001..11f80b28a655847d496890e5c66d5b37