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Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering

Publication ,  Journal Article
Ackerstaff, K; Airapetian, A; Akopov, N; Akushevich, I; Amarian, M; Aschenauer, EC; Avakian, H; Avakian, R; Avetissian, A; Bains, B; Barrow, S ...
Published in: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
January 1, 1999

Spin asymmetries of semi-inclusive cross sections for the production of positively and negatively charged hadrons have been measured in deep-inelastic scattering of polarized positrons on polarized hydrogen and He targets, in the kinematic range 0.023 < x < 0.6 and 1 GeV2 < Q2 < 10 GeV2. Polarized quark distributions are extracted as a function of x for up (u + ū) and down (d + d̄) flavors. The up quark polarization is positive and the down quark polarization is negative in the measured range. The polarization of the sea is compatible with zero. The first moments of the polarized quark distributions are presented. The isospin non-singlet combination Δq3 is consistent with the prediction based on the Bjorken sum rule. The moments of the polarized quark distributions are compared to predictions based on SU(3)f flavor symmetry and to a prediction from lattice QCD. © 1999 Published by Elsevier Science B.V. All rights reserved.

Duke Scholars

Published In

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

DOI

ISSN

0370-2693

Publication Date

January 1, 1999

Volume

464

Issue

1-2

Start / End Page

123 / 134

Related Subject Headings

  • Nuclear & Particles Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
  • 0105 Mathematical Physics
 

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Ackerstaff, K., Airapetian, A., Akopov, N., Akushevich, I., Amarian, M., Aschenauer, E. C., … Kaiser, R. (1999). Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 464(1–2), 123–134. https://doi.org/10.1016/S0370-2693(99)00964-8
Ackerstaff, K., A. Airapetian, N. Akopov, I. Akushevich, M. Amarian, E. C. Aschenauer, H. Avakian, et al. “Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering.” Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 464, no. 1–2 (January 1, 1999): 123–34. https://doi.org/10.1016/S0370-2693(99)00964-8.
Ackerstaff K, Airapetian A, Akopov N, Akushevich I, Amarian M, Aschenauer EC, et al. Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 1999 Jan 1;464(1–2):123–34.
Ackerstaff, K., et al. “Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering.” Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 464, no. 1–2, Jan. 1999, pp. 123–34. Scopus, doi:10.1016/S0370-2693(99)00964-8.
Ackerstaff K, Airapetian A, Akopov N, Akushevich I, Amarian M, Aschenauer EC, Avakian H, Avakian R, Avetissian A, Bains B, Barrow S, Baumgarten C, Beckmann M, Belostotski S, Belz JE, Benisch T, Bernreuther S, Bianchi N, Blanchard S, Blouw J, Böttcher H, Borissov A, Brack J, Bray B, Brauksiepe S, Braun B, Brons S, Brückner W, Brüll A, Bruins EEW, Bulten HJ, Cadman RV, Capitani GP, Carter P, Chumney P, Cisbani E, Court GR, Dalpiaz PF, de Leo R, Delheij PPJ, de Sanctis E, de Schepper D, Devitsin E, de Witt Huberts PKA, di Nezza P, Düren M, Dvoredsky A, Ely J, Elbakian G, Emerson J, Fantoni A, Fechtchenko A, Ferstl M, Fick D, Fiedler K, Filippone BW, Fischer H, Fortune HT, Fox B, Frabetti S, Franz J, Frullani S, Funk MA, Gagunashvili ND, Galumian P, Gao H, Gärber Y, Garibaldi F, Gavrilov G, Geiger P, Gharibyan V, Golendukhin A, Graw G, Grebeniouk O, Green PW, Greeniaus LG, Grosshauser C, Guidal M, Gute A, Gyurjyan V, Haas JP, Haeberli W, Hansen JO, Hasch D, Häusser O, Henderson R, Heinsius FH, Henkes T, Henoch M, Hertenberger R, Holler Y, Holt RJ, Hoprich W, Ihssen H, Iodice M, Izotov A, Jackson HE, Jgoun A, Jones C, Kaiser R. Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 1999 Jan 1;464(1–2):123–134.
Journal cover image

Published In

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

DOI

ISSN

0370-2693

Publication Date

January 1, 1999

Volume

464

Issue

1-2

Start / End Page

123 / 134

Related Subject Headings

  • Nuclear & Particles Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
  • 0105 Mathematical Physics