We present a new measurement of the spin-dependent structure function g1d of the deuteron from deep inelastic scattering of 190 GeV polarized muons on polarized deuterons. The results are combined with our previous measurements of g1d. A perturbative QCD evolution in next-to-leading order is used to compute g1d(x) at a constant Q2. At Q2 = 10 GeV2, we obtain a first moment Γ1d=∫1dg1ddx=0.041±0.008, a flavour-singlet axial charge of the nucleon a0 = 0.30 ± 0.08, and an axial charge of the strange quark as = −0.09 ± 0.03. Using our earlier determination of Γ1p, we obtain Γ1p − Γ1m = 0.183 ± 0.035 at Q2 = 10GeV2. This result is in agreement with the Bjorken sum rule which predicts Γ1p − Γ1n = 0.186 ± 0.002 at the same Q2.

The spin-dependent structure function g1(x) of the deuteron from polarized deep-inelastic muon scattering / D., A., B., A., T., A., E., A., A., A., B., B., M. K., B., D., B., G., B., G., B., P., B., L., B., I. G., B., Birsa, R., P., B., B. E., B., N., d.B., M., B., Bradamante, F., A., B., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 396:(1997), pp. 338-348. [10.1016/S0370-2693(97)00159-7]

The spin-dependent structure function g1(x) of the deuteron from polarized deep-inelastic muon scattering

BIRSA, RENATO;BRADAMANTE, FRANCO;BRESSAN, Andrea;DALLA TORRE, SILVIA;GIORGI, MARCELLO;MARTIN, ANNA;SCHIAVON, PAOLO;SIMEONI, FABRIZIO;ZANETTI, ANNA MARIA;
1997-01-01

Abstract

We present a new measurement of the spin-dependent structure function g1d of the deuteron from deep inelastic scattering of 190 GeV polarized muons on polarized deuterons. The results are combined with our previous measurements of g1d. A perturbative QCD evolution in next-to-leading order is used to compute g1d(x) at a constant Q2. At Q2 = 10 GeV2, we obtain a first moment Γ1d=∫1dg1ddx=0.041±0.008, a flavour-singlet axial charge of the nucleon a0 = 0.30 ± 0.08, and an axial charge of the strange quark as = −0.09 ± 0.03. Using our earlier determination of Γ1p, we obtain Γ1p − Γ1m = 0.183 ± 0.035 at Q2 = 10GeV2. This result is in agreement with the Bjorken sum rule which predicts Γ1p − Γ1n = 0.186 ± 0.002 at the same Q2.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2557997
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