Precision Measurement of the Neutron Spin Asymmetry A1 n and Spin-Flavor Decomposition 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. Roche, 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

134 Citations (Scopus)

Abstract

The neutron spin asymmetry A1n with high precision at three kinematic in the deep inelastic region at x=0.33, 0.47 and Q 2=2.7, 3.5 and 4.8(GeV/c)2, respectively was measured. It was shown that A1n crosses zero around x=0.47 and becomes significantly positive at x=0.60. The polarized quark distributions, combined with the world proton data were also extracted. The hadron helicity conservation (HHC) mechanism, based on leading-order perturbative quantum chromodynamics (PQCD), where the quark orbital angular momentum (OAM) was assumed to be zero was discussed.

Original languageEnglish (US)
Pages (from-to)120041-120045
Number of pages5
JournalPhysical Review Letters
Volume92
Issue number1
StatePublished - Jan 9 2004
Externally publishedYes

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asymmetry
quarks
valence
decomposition
neutrons
conservation
kinematics
angular momentum
quantum chromodynamics
orbitals
protons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Zheng, X., Aniol, K., Armstrong, D. S., Averett, T. D., Bertozzi, W., Binet, S., ... Zołnierczuk, P. A. (2004). Precision Measurement of the Neutron Spin Asymmetry A1 n and Spin-Flavor Decomposition in the Valence Quark Region. Physical Review Letters, 92(1), 120041-120045.

Precision Measurement of the Neutron Spin Asymmetry A1 n and Spin-Flavor Decomposition 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.; Roche, 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 Letters, Vol. 92, No. 1, 09.01.2004, p. 120041-120045.

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, Roche, 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 Asymmetry A1 n and Spin-Flavor Decomposition in the Valence Quark Region', Physical Review Letters, vol. 92, no. 1, pp. 120041-120045.
Zheng X, Aniol K, Armstrong DS, Averett TD, Bertozzi W, Binet S et al. Precision Measurement of the Neutron Spin Asymmetry A1 n and Spin-Flavor Decomposition in the Valence Quark Region. Physical Review Letters. 2004 Jan 9;92(1):120041-120045.
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. ; Roche, 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 Asymmetry A1 n and Spin-Flavor Decomposition in the Valence Quark Region. In: Physical Review Letters. 2004 ; Vol. 92, No. 1. pp. 120041-120045.
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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 - Roche, 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 - 2004/1/9

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AB - The neutron spin asymmetry A1n with high precision at three kinematic in the deep inelastic region at x=0.33, 0.47 and Q 2=2.7, 3.5 and 4.8(GeV/c)2, respectively was measured. It was shown that A1n crosses zero around x=0.47 and becomes significantly positive at x=0.60. The polarized quark distributions, combined with the world proton data were also extracted. The hadron helicity conservation (HHC) mechanism, based on leading-order perturbative quantum chromodynamics (PQCD), where the quark orbital angular momentum (OAM) was assumed to be zero was discussed.

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EP - 120045

JO - Physical Review Letters

JF - Physical Review Letters

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