Q2 dependence of the neutron spin structure function g2n at low Q2

K. Kramer; D. S. Armstrong; T. D. Averett; W. Bertozzi; S. Binet; C. Butuceanu; A. Camsonne; G. D. Cates; J. P. Chen; Seonho Choi; E. Chudakov; F. Cusanno; A. Deur; P. Djawotho; D. Dutta; J. M. Finn; H. Gao; F. Garibaldi; O. Gayou; R. Gilman; A. Glamazdin; V. Gorbenko; K. A. Griffioen; J. O. Hansen; D. W. Higinbotham; W. Hinton; T. Horn; C. W. De Jager; X. Jiang; W. Korsch; J. Lerose; D. Lhuillier; N. Liyanage; D. J. Margaziotis; K. McCormick; Z. E. Meziani; R. Michaels; B. Milbrath; B. Moffit; S. Nanda; C. F. Perdrisat; R. Pomatsalyuk; V. Punjabi; B. Reitz; J. Roche; R. Roché; M. Roedelbronn; N. Savvinov; J. Secrest; J. Singh; S. Širca; K. Slifer; P. Solvignon; D. J. Steiner; R. Suleiman; V. Sulkosky; A. Tobias; A. Vacheret; Y. Xiao; X. Zheng; J. Zhou; L. Zhu; X. Zhu; P. A. Zołnierczuk

doi:10.1103/PhysRevLett.95.142002

Q2 dependence of the neutron spin structure function g2n at low Q2

K. Kramer, D. S. Armstrong, T. D. Averett, W. Bertozzi, S. Binet, C. Butuceanu, A. Camsonne, G. D. Cates, J. P. Chen, Seonho Choi, E. Chudakov, F. Cusanno, A. Deur, P. Djawotho, D. Dutta, J. M. Finn, H. Gao, F. Garibaldi, O. Gayou, R. GilmanA. Glamazdin, V. Gorbenko, K. A. Griffioen, J. O. Hansen, D. W. Higinbotham, W. Hinton, T. Horn, C. W. De Jager, X. Jiang, W. Korsch, J. Lerose, D. Lhuillier, N. Liyanage, D. J. Margaziotis, K. McCormick, Z. E. Meziani, R. Michaels, B. Milbrath, B. Moffit, S. Nanda, C. F. Perdrisat, R. Pomatsalyuk, V. Punjabi, B. Reitz, J. Roche, R. Roché, M. Roedelbronn, N. Savvinov, J. Secrest, J. Singh, S. Širca, K. Slifer, P. Solvignon, D. J. Steiner, R. Suleiman, V. Sulkosky, A. Tobias, A. Vacheret, Y. Xiao, X. Zheng, J. Zhou, L. Zhu, X. Zhu, P. A. Zołnierczuk

Physics And Astronomy

Research output: Contribution to journal › Article › peer-review

55 Scopus citations

Abstract

We present the first measurement of the Q2 dependence of the neutron spin structure function g2n at five kinematic points covering 0.57(GeV/c) 2â‰Q2â‰1.34(GeV/c)2 at xâ‰σ0.2. Though the naive quark-parton model predicts g2=0, nonzero values occur in more realistic models of the nucleon which include quark-gluon correlations, finite quark masses, or orbital angular momentum. When scattering from a noninteracting quark, g2n can be predicted using next-to-leading order fits to world data for g1n. Deviations from this prediction provide an opportunity to examine QCD dynamics in nucleon structure. Our results show a positive deviation from this prediction at lower Q2, indicating that contributions such as quark-gluon interactions may be important. Precision data obtained for g1n are consistent with next-to-leading order fits to world data.

Original language	English
Article number	142002
Journal	Physical Review Letters
Volume	95
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.95.142002
State	Published - Sep 30 2005

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1103/PhysRevLett.95.142002

Cite this

Kramer, K., Armstrong, D. S., Averett, T. D., Bertozzi, W., Binet, S., Butuceanu, C., Camsonne, A., Cates, G. D., Chen, J. P., Choi, S., Chudakov, E., Cusanno, F., Deur, A., Djawotho, P., Dutta, D., Finn, J. M., Gao, H., Garibaldi, F., Gayou, O., ... Zołnierczuk, P. A. (2005). Q2 dependence of the neutron spin structure function g2n at low Q2. Physical Review Letters, 95(14), Article 142002. https://doi.org/10.1103/PhysRevLett.95.142002

@article{30556af4b87744a8b260743a05345c35,

title = "Q2 dependence of the neutron spin structure function g2n at low Q2",

abstract = "We present the first measurement of the Q2 dependence of the neutron spin structure function g2n at five kinematic points covering 0.57(GeV/c) 2{\^a}‰Q2{\^a}‰1.34(GeV/c)2 at x{\^a}‰σ0.2. Though the naive quark-parton model predicts g2=0, nonzero values occur in more realistic models of the nucleon which include quark-gluon correlations, finite quark masses, or orbital angular momentum. When scattering from a noninteracting quark, g2n can be predicted using next-to-leading order fits to world data for g1n. Deviations from this prediction provide an opportunity to examine QCD dynamics in nucleon structure. Our results show a positive deviation from this prediction at lower Q2, indicating that contributions such as quark-gluon interactions may be important. Precision data obtained for g1n are consistent with next-to-leading order fits to world data.",

author = "K. Kramer and Armstrong, {D. S.} and Averett, {T. D.} and W. Bertozzi and S. Binet and C. Butuceanu and A. Camsonne and Cates, {G. D.} and Chen, {J. P.} and Seonho Choi and E. Chudakov and F. Cusanno and A. Deur and P. Djawotho and D. Dutta and Finn, {J. M.} and H. Gao and F. Garibaldi and O. Gayou and R. Gilman and A. Glamazdin and V. Gorbenko and Griffioen, {K. A.} and Hansen, {J. O.} and Higinbotham, {D. W.} and W. Hinton and T. Horn and {De Jager}, {C. W.} and X. Jiang and W. Korsch and J. Lerose and D. Lhuillier and N. Liyanage and Margaziotis, {D. J.} and K. McCormick and Meziani, {Z. E.} and R. Michaels and B. Milbrath and B. Moffit and S. Nanda and Perdrisat, {C. F.} and R. Pomatsalyuk and V. Punjabi and B. Reitz and J. Roche and R. Roch{\'e} and M. Roedelbronn and N. Savvinov and J. Secrest and J. Singh and S. {\v S}irca and K. Slifer and P. Solvignon and Steiner, {D. J.} and R. Suleiman and V. Sulkosky and A. Tobias and A. Vacheret and Y. Xiao and X. Zheng and J. Zhou and L. Zhu and X. Zhu and Zo{\l}nierczuk, {P. A.}",

year = "2005",

month = sep,

day = "30",

doi = "10.1103/PhysRevLett.95.142002",

language = "English",

volume = "95",

number = "14",

}

Kramer, K, Armstrong, DS, Averett, TD, Bertozzi, W, Binet, S, Butuceanu, C, Camsonne, A, Cates, GD, Chen, JP, Choi, S, Chudakov, E, Cusanno, F, Deur, A, Djawotho, P, Dutta, D, Finn, JM, Gao, H, Garibaldi, F, Gayou, O, Gilman, R, Glamazdin, A, Gorbenko, V, Griffioen, KA, Hansen, JO, Higinbotham, DW, Hinton, W, Horn, T, De Jager, CW, Jiang, X, Korsch, W, Lerose, J, Lhuillier, D, Liyanage, N, Margaziotis, DJ, McCormick, K, Meziani, ZE, Michaels, R, Milbrath, B, Moffit, B, Nanda, S, Perdrisat, CF, Pomatsalyuk, R, Punjabi, V, Reitz, B, Roche, J, Roché, R, Roedelbronn, M, Savvinov, N, Secrest, J, Singh, J, Širca, S, Slifer, K, Solvignon, P, Steiner, DJ, Suleiman, R, Sulkosky, V, Tobias, A, Vacheret, A, Xiao, Y, Zheng, X, Zhou, J, Zhu, L, Zhu, X & Zołnierczuk, PA 2005, 'Q2 dependence of the neutron spin structure function g2n at low Q2', Physical Review Letters, vol. 95, no. 14, 142002. https://doi.org/10.1103/PhysRevLett.95.142002

TY - JOUR

T1 - Q2 dependence of the neutron spin structure function g2n at low Q2

AU - Kramer, K.

AU - Armstrong, D. S.

AU - Averett, T. D.

AU - Bertozzi, W.

AU - Binet, S.

AU - Butuceanu, C.

AU - Camsonne, A.

AU - Cates, G. D.

AU - Chen, J. P.

AU - Choi, Seonho

AU - Chudakov, E.

AU - Cusanno, F.

AU - Deur, A.

AU - Djawotho, P.

AU - Dutta, D.

AU - Finn, J. M.

AU - Gao, H.

AU - Garibaldi, F.

AU - Gayou, O.

AU - Gilman, R.

AU - Glamazdin, A.

AU - Gorbenko, V.

AU - Griffioen, K. A.

AU - Hansen, J. O.

AU - Higinbotham, D. W.

AU - Hinton, W.

AU - Horn, T.

AU - De Jager, C. W.

AU - Jiang, X.

AU - Korsch, W.

AU - Lerose, J.

AU - Lhuillier, D.

AU - Liyanage, N.

AU - Margaziotis, D. J.

AU - McCormick, K.

AU - Meziani, Z. E.

AU - Michaels, R.

AU - Milbrath, B.

AU - Moffit, B.

AU - Nanda, S.

AU - Perdrisat, C. F.

AU - Pomatsalyuk, R.

AU - Punjabi, V.

AU - Reitz, B.

AU - Roche, J.

AU - Roché, R.

AU - Roedelbronn, M.

AU - Savvinov, N.

AU - Secrest, J.

AU - Singh, J.

AU - Širca, S.

AU - Slifer, K.

AU - Solvignon, P.

AU - Steiner, D. J.

AU - Suleiman, R.

AU - Sulkosky, V.

AU - Tobias, A.

AU - Vacheret, A.

AU - Xiao, Y.

AU - Zheng, X.

AU - Zhou, J.

AU - Zhu, L.

AU - Zhu, X.

AU - Zołnierczuk, P. A.

PY - 2005/9/30

Y1 - 2005/9/30

N2 - We present the first measurement of the Q2 dependence of the neutron spin structure function g2n at five kinematic points covering 0.57(GeV/c) 2â‰Q2â‰1.34(GeV/c)2 at xâ‰σ0.2. Though the naive quark-parton model predicts g2=0, nonzero values occur in more realistic models of the nucleon which include quark-gluon correlations, finite quark masses, or orbital angular momentum. When scattering from a noninteracting quark, g2n can be predicted using next-to-leading order fits to world data for g1n. Deviations from this prediction provide an opportunity to examine QCD dynamics in nucleon structure. Our results show a positive deviation from this prediction at lower Q2, indicating that contributions such as quark-gluon interactions may be important. Precision data obtained for g1n are consistent with next-to-leading order fits to world data.

AB - We present the first measurement of the Q2 dependence of the neutron spin structure function g2n at five kinematic points covering 0.57(GeV/c) 2â‰Q2â‰1.34(GeV/c)2 at xâ‰σ0.2. Though the naive quark-parton model predicts g2=0, nonzero values occur in more realistic models of the nucleon which include quark-gluon correlations, finite quark masses, or orbital angular momentum. When scattering from a noninteracting quark, g2n can be predicted using next-to-leading order fits to world data for g1n. Deviations from this prediction provide an opportunity to examine QCD dynamics in nucleon structure. Our results show a positive deviation from this prediction at lower Q2, indicating that contributions such as quark-gluon interactions may be important. Precision data obtained for g1n are consistent with next-to-leading order fits to world data.

UR - http://www.scopus.com/inward/record.url?scp=28844473519&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=28844473519&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.95.142002

DO - 10.1103/PhysRevLett.95.142002

M3 - Article

AN - SCOPUS:28844473519

SN - 0031-9007

VL - 95

JO - Physical Review Letters

JF - Physical Review Letters

IS - 14

M1 - 142002

ER -

Q2 dependence of the neutron spin structure function g2n at low Q2

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this