Measurement of the neutron spin structure function g(1)(n) with a polarized He-3 internal target
- Ackerstaff, K.
- Airapetian, A.
- Akushevich, I.
- Akopov, N.
- Amarian, M.
- Aschenauer, E.C.
- Avakian, R.
- Avakian, H.
- Avetissian, A.
- Bains, B.
- Barrow, S.
- Beckmann, M.
- Belostotski, S.
- Belz, J.E.
- Benisch, T.
- Bernreuther, S.
- Bianchi, N.
- Blanchard, S.
- Blouw, J.
- Bottcher, H.
- Borissov, A.
- Brack, J.
- Braun, B.
- Bray, B.
- Bruckner, W.
- Brull, A.
- Bruins, E.E.W.
- Bulten, H.J.
- Capitani, G.P.
- Carter, P.
- Cisbani, E.
- Court, G.R.
- Delheij, P.P.J.
- Devitsin, E.
- deJager, C.W.
- DeSanctis, E.
- DeSchepper, D.
- Huberts, P.K.A.D.
- Duren, M.
- Dvoredsky, A.
- Elbakian, G.
- Emerson, J.
- Fantoni, A.
- Fechtchenko, A.
- Ferstl, M.
- Fick, D.
- Fiedler, K.
- Filippone, B.W.
- Fischer, H.
- Fortune, H.T.
Publication date
July 1997
DOIAbstract
Results are reported from the HERMES experiment at HERA on a measurement of the neutron spin structure function g(1)(n)(x, Q(2)) in deep inelastic scattering using 27.5 GeV longitudinally polarized positrons incident on a polarized He-3 internal gas target. The data cover the kinematic range 0.023 < x < 0.6 and 1 (GeV/c)(2) < Q(2) < 15 (GeV/c)(2). The integral integral(0.023)(0.16)g(1)(n)(x) dx evaluated at a fixed Q(2) of 2.5 (GeV/c)(2) is -0.034+/-0.013(stat.)+/-0.005(syst.). Assuming Regge behavior at low x, the first moment Gamma(1)(n) = integral(0)(1)g(1)(n)(x) dx is -0.037+/-0.013(stat.)+/-0.005(syst.)+/-0.006(extrapol.). (C) 1997 Published by Elsevier Science B.V
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