Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region

X. Zheng, K. Aniol, D. S. Armstrong, T. D. Averett, W. Bertozzi, S. Binet, E. Burtin, E. Busato, C. Butuceanu, J. Calarco, A. Camsonne, G. D. Cates, Z. Chai, J. P. Chen, Seonho Choi, E. Chudakov, F. Cusanno, R. De Leo, A. Deur, Sonja Dieterich & 61 others D. Dutta, J. M. Finn, S. Frullani, H. Gao, J. Gao, F. Garibaldi, S. Gilad, R. Gilman, J. Gomez, J. O. Hansen, D. W. Higinbotham, W. Hinton, T. Horn, C. W. De Jager, X. Jiang, L. Kaufman, J. Kelly, W. Korsch, K. Kramer, J. LeRose, D. Lhuillier, N. Liyanage, D. J. Margaziotis, F. Marie, P. Markowitz, K. McCormick, Z. E. Meziani, R. Michaels, B. Moffit, S. Nanda, D. Neyret, S. K. Phillips, A. Powell, T. Pussieux, B. Reitz, J. Roche, R. Roché, M. Roedelbronn, G. Ron, M. Rvachev, A. Saha, N. Savvinov, J. Singh, S. Širca, K. Slifer, P. Solvignon, P. Souder, D. J. Steiner, S. Strauch, V. Sulkosky, A. Tobias, G. Urciuoli, A. Vacheret, B. Wojtsekhowski, H. Xiang, Y. Xiao, F. Xiong, B. Zhang, L. Zhu, X. Zhu, P. A. Zołnierczuk

Research output: Contribution to journalArticle

158 Citations (Scopus)

Abstract

We report on measurements of the neutron spin asymmetries A 1,2n and polarized structure functions g 1,2n at three kinematics in the deep inelastic region, with x=0.33, 0.47, and 0.60 and Q2=2.1, 3.5, and 4.8 (GeV/c) 2, respectively. These measurements were performed using a 5.7 GeV longitudinally polarized electron beam and a polarized 3He target. The results for A1n and g1n at x=0.33 are consistent with previous world data and, at the two higher-x points, have improved the precision of the world data by about an order of magnitude. The new A1n data show a zero crossing around x=0.47 and the value at x=0.60 is significantly positive. These results agree with a next-to-leading-order QCD analysis of previous world data. The trend of data at high x agrees with constituent quark model predictions but disagrees with that from leading-order perturbative QCD (PQCD) assuming hadron helicity conservation. Results for A2n and g2 n have a precision comparable to the best world data in this kinematic region. Combined with previous world data, the moment d 2n was evaluated and the new result has improved the precision of this quantity by about a factor of 2. When combined with the world proton data, polarized quark distribution functions were extracted from the new g1n/F1n values based on the quark-parton model. While results for Δu/u agree well with predictions from various models, results for Δd/d disagree with the leading-order PQCD prediction when hadron helicity conservation is imposed.

Original languageEnglish (US)
JournalPhysical Review C - Nuclear Physics
Volume70
Issue number6
DOIs
StatePublished - Dec 2004
Externally publishedYes

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asymmetry
quarks
valence
neutrons
quantum chromodynamics
conservation
kinematics
predictions
quark parton model
roots of equations
quark models
distribution functions
electron beams
moments
trends
protons

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region. / Zheng, X.; Aniol, K.; Armstrong, D. S.; Averett, T. D.; Bertozzi, W.; Binet, S.; Burtin, E.; Busato, E.; Butuceanu, C.; Calarco, J.; Camsonne, A.; Cates, G. D.; Chai, Z.; Chen, J. P.; Choi, Seonho; Chudakov, E.; Cusanno, F.; De Leo, R.; Deur, A.; Dieterich, Sonja; Dutta, D.; Finn, J. M.; Frullani, S.; Gao, H.; Gao, J.; Garibaldi, F.; Gilad, S.; Gilman, R.; Gomez, J.; Hansen, J. O.; Higinbotham, D. W.; Hinton, W.; Horn, T.; De Jager, C. W.; Jiang, X.; Kaufman, L.; Kelly, J.; Korsch, W.; Kramer, K.; LeRose, J.; Lhuillier, D.; Liyanage, N.; Margaziotis, D. J.; Marie, F.; Markowitz, P.; McCormick, K.; Meziani, Z. E.; Michaels, R.; Moffit, B.; Nanda, S.; Neyret, D.; Phillips, S. K.; Powell, A.; Pussieux, T.; Reitz, B.; Roche, J.; Roché, R.; Roedelbronn, M.; Ron, G.; Rvachev, M.; Saha, A.; Savvinov, N.; Singh, J.; Širca, S.; Slifer, K.; Solvignon, P.; Souder, P.; Steiner, D. J.; Strauch, S.; Sulkosky, V.; Tobias, A.; Urciuoli, G.; Vacheret, A.; Wojtsekhowski, B.; Xiang, H.; Xiao, Y.; Xiong, F.; Zhang, B.; Zhu, L.; Zhu, X.; Zołnierczuk, P. A.

In: Physical Review C - Nuclear Physics, Vol. 70, No. 6, 12.2004.

Research output: Contribution to journalArticle

Zheng, X, Aniol, K, Armstrong, DS, Averett, TD, Bertozzi, W, Binet, S, Burtin, E, Busato, E, Butuceanu, C, Calarco, J, Camsonne, A, Cates, GD, Chai, Z, Chen, JP, Choi, S, Chudakov, E, Cusanno, F, De Leo, R, Deur, A, Dieterich, S, Dutta, D, Finn, JM, Frullani, S, Gao, H, Gao, J, Garibaldi, F, Gilad, S, Gilman, R, Gomez, J, Hansen, JO, Higinbotham, DW, Hinton, W, Horn, T, De Jager, CW, Jiang, X, Kaufman, L, Kelly, J, Korsch, W, Kramer, K, LeRose, J, Lhuillier, D, Liyanage, N, Margaziotis, DJ, Marie, F, Markowitz, P, McCormick, K, Meziani, ZE, Michaels, R, Moffit, B, Nanda, S, Neyret, D, Phillips, SK, Powell, A, Pussieux, T, Reitz, B, Roche, J, Roché, R, Roedelbronn, M, Ron, G, Rvachev, M, Saha, A, Savvinov, N, Singh, J, Širca, S, Slifer, K, Solvignon, P, Souder, P, Steiner, DJ, Strauch, S, Sulkosky, V, Tobias, A, Urciuoli, G, Vacheret, A, Wojtsekhowski, B, Xiang, H, Xiao, Y, Xiong, F, Zhang, B, Zhu, L, Zhu, X & Zołnierczuk, PA 2004, 'Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region', Physical Review C - Nuclear Physics, vol. 70, no. 6. https://doi.org/10.1103/PhysRevC.70.065207
Zheng, X. ; Aniol, K. ; Armstrong, D. S. ; Averett, T. D. ; Bertozzi, W. ; Binet, S. ; Burtin, E. ; Busato, E. ; Butuceanu, C. ; Calarco, J. ; Camsonne, A. ; Cates, G. D. ; Chai, Z. ; Chen, J. P. ; Choi, Seonho ; Chudakov, E. ; Cusanno, F. ; De Leo, R. ; Deur, A. ; Dieterich, Sonja ; Dutta, D. ; Finn, J. M. ; Frullani, S. ; Gao, H. ; Gao, J. ; Garibaldi, F. ; Gilad, S. ; Gilman, R. ; Gomez, J. ; Hansen, J. O. ; Higinbotham, D. W. ; Hinton, W. ; Horn, T. ; De Jager, C. W. ; Jiang, X. ; Kaufman, L. ; Kelly, J. ; Korsch, W. ; Kramer, K. ; LeRose, J. ; Lhuillier, D. ; Liyanage, N. ; Margaziotis, D. J. ; Marie, F. ; Markowitz, P. ; McCormick, K. ; Meziani, Z. E. ; Michaels, R. ; Moffit, B. ; Nanda, S. ; Neyret, D. ; Phillips, S. K. ; Powell, A. ; Pussieux, T. ; Reitz, B. ; Roche, J. ; Roché, R. ; Roedelbronn, M. ; Ron, G. ; Rvachev, M. ; Saha, A. ; Savvinov, N. ; Singh, J. ; Širca, S. ; Slifer, K. ; Solvignon, P. ; Souder, P. ; Steiner, D. J. ; Strauch, S. ; Sulkosky, V. ; Tobias, A. ; Urciuoli, G. ; Vacheret, A. ; Wojtsekhowski, B. ; Xiang, H. ; Xiao, Y. ; Xiong, F. ; Zhang, B. ; Zhu, L. ; Zhu, X. ; Zołnierczuk, P. A. / Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region. In: Physical Review C - Nuclear Physics. 2004 ; Vol. 70, No. 6.
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title = "Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region",
abstract = "We report on measurements of the neutron spin asymmetries A 1,2n and polarized structure functions g 1,2n at three kinematics in the deep inelastic region, with x=0.33, 0.47, and 0.60 and Q2=2.1, 3.5, and 4.8 (GeV/c) 2, respectively. These measurements were performed using a 5.7 GeV longitudinally polarized electron beam and a polarized 3He target. The results for A1n and g1n at x=0.33 are consistent with previous world data and, at the two higher-x points, have improved the precision of the world data by about an order of magnitude. The new A1n data show a zero crossing around x=0.47 and the value at x=0.60 is significantly positive. These results agree with a next-to-leading-order QCD analysis of previous world data. The trend of data at high x agrees with constituent quark model predictions but disagrees with that from leading-order perturbative QCD (PQCD) assuming hadron helicity conservation. Results for A2n and g2 n have a precision comparable to the best world data in this kinematic region. Combined with previous world data, the moment d 2n was evaluated and the new result has improved the precision of this quantity by about a factor of 2. When combined with the world proton data, polarized quark distribution functions were extracted from the new g1n/F1n values based on the quark-parton model. While results for Δu/u agree well with predictions from various models, results for Δd/d disagree with the leading-order PQCD prediction when hadron helicity conservation is imposed.",
author = "X. Zheng and K. Aniol and Armstrong, {D. S.} and Averett, {T. D.} and W. Bertozzi and S. Binet and E. Burtin and E. Busato and C. Butuceanu and J. Calarco and A. Camsonne and Cates, {G. D.} and Z. Chai and Chen, {J. P.} and Seonho Choi and E. Chudakov and F. Cusanno and {De Leo}, R. and A. Deur and Sonja Dieterich and D. Dutta and Finn, {J. M.} and S. Frullani and H. Gao and J. Gao and F. Garibaldi and S. Gilad and R. Gilman and J. Gomez and Hansen, {J. O.} and Higinbotham, {D. W.} and W. Hinton and T. Horn and {De Jager}, {C. W.} and X. Jiang and L. Kaufman and J. Kelly and W. Korsch and K. Kramer and J. LeRose and D. Lhuillier and N. Liyanage and Margaziotis, {D. J.} and F. Marie and P. Markowitz and K. McCormick and Meziani, {Z. E.} and R. Michaels and B. Moffit and S. Nanda and D. Neyret and Phillips, {S. K.} and A. Powell and T. Pussieux and B. Reitz and J. Roche and R. Roch{\'e} and M. Roedelbronn and G. Ron and M. Rvachev and A. Saha and N. Savvinov and J. Singh and S. Širca and K. Slifer and P. Solvignon and P. Souder and Steiner, {D. J.} and S. Strauch and V. Sulkosky and A. Tobias and G. Urciuoli and A. Vacheret and B. Wojtsekhowski and H. Xiang and Y. Xiao and F. Xiong and B. Zhang and L. Zhu and X. Zhu and Zołnierczuk, {P. A.}",
year = "2004",
month = "12",
doi = "10.1103/PhysRevC.70.065207",
language = "English (US)",
volume = "70",
journal = "Physical Review C - Nuclear Physics",
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TY - JOUR

T1 - Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region

AU - Zheng, X.

AU - Aniol, K.

AU - Armstrong, D. S.

AU - Averett, T. D.

AU - Bertozzi, W.

AU - Binet, S.

AU - Burtin, E.

AU - Busato, E.

AU - Butuceanu, C.

AU - Calarco, J.

AU - Camsonne, A.

AU - Cates, G. D.

AU - Chai, Z.

AU - Chen, J. P.

AU - Choi, Seonho

AU - Chudakov, E.

AU - Cusanno, F.

AU - De Leo, R.

AU - Deur, A.

AU - Dieterich, Sonja

AU - Dutta, D.

AU - Finn, J. M.

AU - Frullani, S.

AU - Gao, H.

AU - Gao, J.

AU - Garibaldi, F.

AU - Gilad, S.

AU - Gilman, R.

AU - Gomez, J.

AU - Hansen, J. O.

AU - Higinbotham, D. W.

AU - Hinton, W.

AU - Horn, T.

AU - De Jager, C. W.

AU - Jiang, X.

AU - Kaufman, L.

AU - Kelly, J.

AU - Korsch, W.

AU - Kramer, K.

AU - LeRose, J.

AU - Lhuillier, D.

AU - Liyanage, N.

AU - Margaziotis, D. J.

AU - Marie, F.

AU - Markowitz, P.

AU - McCormick, K.

AU - Meziani, Z. E.

AU - Michaels, R.

AU - Moffit, B.

AU - Nanda, S.

AU - Neyret, D.

AU - Phillips, S. K.

AU - Powell, A.

AU - Pussieux, T.

AU - Reitz, B.

AU - Roche, J.

AU - Roché, R.

AU - Roedelbronn, M.

AU - Ron, G.

AU - Rvachev, M.

AU - Saha, A.

AU - Savvinov, N.

AU - Singh, J.

AU - Širca, S.

AU - Slifer, K.

AU - Solvignon, P.

AU - Souder, P.

AU - Steiner, D. J.

AU - Strauch, S.

AU - Sulkosky, V.

AU - Tobias, A.

AU - Urciuoli, G.

AU - Vacheret, A.

AU - Wojtsekhowski, B.

AU - Xiang, H.

AU - Xiao, Y.

AU - Xiong, F.

AU - Zhang, B.

AU - Zhu, L.

AU - Zhu, X.

AU - Zołnierczuk, P. A.

PY - 2004/12

Y1 - 2004/12

N2 - We report on measurements of the neutron spin asymmetries A 1,2n and polarized structure functions g 1,2n at three kinematics in the deep inelastic region, with x=0.33, 0.47, and 0.60 and Q2=2.1, 3.5, and 4.8 (GeV/c) 2, respectively. These measurements were performed using a 5.7 GeV longitudinally polarized electron beam and a polarized 3He target. The results for A1n and g1n at x=0.33 are consistent with previous world data and, at the two higher-x points, have improved the precision of the world data by about an order of magnitude. The new A1n data show a zero crossing around x=0.47 and the value at x=0.60 is significantly positive. These results agree with a next-to-leading-order QCD analysis of previous world data. The trend of data at high x agrees with constituent quark model predictions but disagrees with that from leading-order perturbative QCD (PQCD) assuming hadron helicity conservation. Results for A2n and g2 n have a precision comparable to the best world data in this kinematic region. Combined with previous world data, the moment d 2n was evaluated and the new result has improved the precision of this quantity by about a factor of 2. When combined with the world proton data, polarized quark distribution functions were extracted from the new g1n/F1n values based on the quark-parton model. While results for Δu/u agree well with predictions from various models, results for Δd/d disagree with the leading-order PQCD prediction when hadron helicity conservation is imposed.

AB - We report on measurements of the neutron spin asymmetries A 1,2n and polarized structure functions g 1,2n at three kinematics in the deep inelastic region, with x=0.33, 0.47, and 0.60 and Q2=2.1, 3.5, and 4.8 (GeV/c) 2, respectively. These measurements were performed using a 5.7 GeV longitudinally polarized electron beam and a polarized 3He target. The results for A1n and g1n at x=0.33 are consistent with previous world data and, at the two higher-x points, have improved the precision of the world data by about an order of magnitude. The new A1n data show a zero crossing around x=0.47 and the value at x=0.60 is significantly positive. These results agree with a next-to-leading-order QCD analysis of previous world data. The trend of data at high x agrees with constituent quark model predictions but disagrees with that from leading-order perturbative QCD (PQCD) assuming hadron helicity conservation. Results for A2n and g2 n have a precision comparable to the best world data in this kinematic region. Combined with previous world data, the moment d 2n was evaluated and the new result has improved the precision of this quantity by about a factor of 2. When combined with the world proton data, polarized quark distribution functions were extracted from the new g1n/F1n values based on the quark-parton model. While results for Δu/u agree well with predictions from various models, results for Δd/d disagree with the leading-order PQCD prediction when hadron helicity conservation is imposed.

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U2 - 10.1103/PhysRevC.70.065207

DO - 10.1103/PhysRevC.70.065207

M3 - Article

VL - 70

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 6

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