Deep inelastic scattering of polarized electrons by polarized 3He and the study of the neutron spin structure

P. L. Anthony; R. G. Arnold; H. R. Band; H. Borel; P. E. Bosted; V. Breton; G. D. Cates; T. E. Chupp; F. S. Dietrich; J. Dunne; R. Erbacher; J. Fellbaum; H. Fonvieille; R. Gearhart; R. Holmes; E. W. Hughes; J. R. Johnson; D. Kawall; C. Keppel; S. E. Kuhn; R. M. Lombard-Nelsen; J. Marroncle; T. Maruyama; W. Meyer; Z. E. Meziani; H. Middleton; J. Morgenstern; N. R. Newbury; G. G. Petratos; R. Pitthan; R. Prepost; Y. Roblin; S. E. Rock; S. H. Rokni; G. Shapiro; T. Smith; P. A. Souder; M. Spengos; F. Staley; L. M. Stuart; Z. M. Szalata; Y. Terrien; A. K. Thompson; J. L. White; M. Woods; J. Xu; C. C. Young; G. Zapalac

doi:10.1103/PhysRevD.54.6620

Deep inelastic scattering of polarized electrons by polarized ³He and the study of the neutron spin structure

P. L. Anthony, R. G. Arnold, H. R. Band, H. Borel, P. E. Bosted, V. Breton, G. D. Cates, T. E. Chupp, F. S. Dietrich, J. Dunne, R. Erbacher, J. Fellbaum, H. Fonvieille, R. Gearhart, R. Holmes, E. W. Hughes, J. R. Johnson, D. Kawall, C. Keppel, S. E. KuhnR. M. Lombard-Nelsen, J. Marroncle, T. Maruyama, W. Meyer, Z. E. Meziani, H. Middleton, J. Morgenstern, N. R. Newbury, G. G. Petratos, R. Pitthan, R. Prepost, Y. Roblin, S. E. Rock, S. H. Rokni, G. Shapiro, T. Smith, P. A. Souder, M. Spengos, F. Staley, L. M. Stuart, Z. M. Szalata, Y. Terrien, A. K. Thompson, J. L. White, M. Woods, J. Xu, C. C. Young, G. Zapalac

Department of Physics

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Abstract

The neutron longitudinal and transverse asymmetries Aⁿ₁ and Aⁿ₂ have been extracted from deep inelastic scattering of polarized electrons by a polarized ³He target at incident energies of 19.42, 22.66, and 25.51 GeV. The measurement allows for the determination of the neutron spin structure functions gⁿ₁(x, Q²) and gⁿ₂(x, Q²) over the range 0.03<x<0.6 at an average Q² of 2 (GeV/c)². The data are used for the evaluation of the Ellis-Jaffe and Bjorken sum rules. The neutron spin structure function gⁿ₁(x, Q²) is small and negative within the range of our measurement, yielding an integral ∫0.03^0.6gⁿ₁(x)dx=-0.028±0.006 (stat)±0.006 (syst). Assuming Regge behavior at low x, we extract Γⁿ₁=∫0¹gⁿ₁(x)dx=-0.031±0.006 (stat)±0.009 (syst). Combined with previous proton integral results from SLAC experiment E143, we find Γ^p₁-Γⁿ₁=0.160±0.015 in agreement with the Bjorken sum rule prediction Γ^p₁-Γⁿ₁=0.176±0.008 at a Q² value of 3 (GeV/c)² evaluated using α_s=0.32±0.05.

Original language	English (US)
Pages (from-to)	6620-6650
Number of pages	31
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	54
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.54.6620
State	Published - 1996

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

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10.1103/PhysRevD.54.6620

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Anthony, P. L., Arnold, R. G., Band, H. R., Borel, H., Bosted, P. E., Breton, V., Cates, G. D., Chupp, T. E., Dietrich, F. S., Dunne, J., Erbacher, R., Fellbaum, J., Fonvieille, H., Gearhart, R., Holmes, R., Hughes, E. W., Johnson, J. R., Kawall, D., Keppel, C., ... Zapalac, G. (1996). Deep inelastic scattering of polarized electrons by polarized ³He and the study of the neutron spin structure. Physical Review D - Particles, Fields, Gravitation and Cosmology, 54(11), 6620-6650. https://doi.org/10.1103/PhysRevD.54.6620

Anthony, PL, Arnold, RG, Band, HR, Borel, H, Bosted, PE, Breton, V, Cates, GD, Chupp, TE, Dietrich, FS, Dunne, J, Erbacher, R, Fellbaum, J, Fonvieille, H, Gearhart, R, Holmes, R, Hughes, EW, Johnson, JR, Kawall, D, Keppel, C, Kuhn, SE, Lombard-Nelsen, RM, Marroncle, J, Maruyama, T, Meyer, W, Meziani, ZE, Middleton, H, Morgenstern, J, Newbury, NR, Petratos, GG, Pitthan, R, Prepost, R, Roblin, Y, Rock, SE, Rokni, SH, Shapiro, G, Smith, T, Souder, PA, Spengos, M, Staley, F, Stuart, LM, Szalata, ZM, Terrien, Y, Thompson, AK, White, JL, Woods, M, Xu, J, Young, CC & Zapalac, G 1996, 'Deep inelastic scattering of polarized electrons by polarized ³He and the study of the neutron spin structure', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 54, no. 11, pp. 6620-6650. https://doi.org/10.1103/PhysRevD.54.6620

@article{b30851a5875345e599fd1aba849f24e2,

title = "Deep inelastic scattering of polarized electrons by polarized 3He and the study of the neutron spin structure",

abstract = "The neutron longitudinal and transverse asymmetries An1 and An2 have been extracted from deep inelastic scattering of polarized electrons by a polarized 3He target at incident energies of 19.42, 22.66, and 25.51 GeV. The measurement allows for the determination of the neutron spin structure functions gn1(x, Q2) and gn2(x, Q2) over the range 0.032 of 2 (GeV/c)2. The data are used for the evaluation of the Ellis-Jaffe and Bjorken sum rules. The neutron spin structure function gn1(x, Q2) is small and negative within the range of our measurement, yielding an integral ∫0.030.6gn1(x)dx=-0.028±0.006 (stat)±0.006 (syst). Assuming Regge behavior at low x, we extract Γn1=∫01gn1(x)dx=-0.031±0.006 (stat)±0.009 (syst). Combined with previous proton integral results from SLAC experiment E143, we find Γp1-Γn1=0.160±0.015 in agreement with the Bjorken sum rule prediction Γp1-Γn1=0.176±0.008 at a Q2 value of 3 (GeV/c)2 evaluated using αs=0.32±0.05.",

author = "Anthony, {P. L.} and Arnold, {R. G.} and Band, {H. R.} and H. Borel and Bosted, {P. E.} and V. Breton and Cates, {G. D.} and Chupp, {T. E.} and Dietrich, {F. S.} and J. Dunne and R. Erbacher and J. Fellbaum and H. Fonvieille and R. Gearhart and R. Holmes and Hughes, {E. W.} and Johnson, {J. R.} and D. Kawall and C. Keppel and Kuhn, {S. E.} and Lombard-Nelsen, {R. M.} and J. Marroncle and T. Maruyama and W. Meyer and Meziani, {Z. E.} and H. Middleton and J. Morgenstern and Newbury, {N. R.} and Petratos, {G. G.} and R. Pitthan and R. Prepost and Y. Roblin and Rock, {S. E.} and Rokni, {S. H.} and G. Shapiro and T. Smith and Souder, {P. A.} and M. Spengos and F. Staley and Stuart, {L. M.} and Szalata, {Z. M.} and Y. Terrien and Thompson, {A. K.} and White, {J. L.} and M. Woods and J. Xu and Young, {C. C.} and G. Zapalac",

year = "1996",

doi = "10.1103/PhysRevD.54.6620",

language = "English (US)",

volume = "54",

pages = "6620--6650",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

publisher = "American Physical Society",

number = "11",

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TY - JOUR

T1 - Deep inelastic scattering of polarized electrons by polarized 3He and the study of the neutron spin structure

AU - Anthony, P. L.

AU - Arnold, R. G.

AU - Band, H. R.

AU - Borel, H.

AU - Bosted, P. E.

AU - Breton, V.

AU - Cates, G. D.

AU - Chupp, T. E.

AU - Dietrich, F. S.

AU - Dunne, J.

AU - Erbacher, R.

AU - Fellbaum, J.

AU - Fonvieille, H.

AU - Gearhart, R.

AU - Holmes, R.

AU - Hughes, E. W.

AU - Johnson, J. R.

AU - Kawall, D.

AU - Keppel, C.

AU - Kuhn, S. E.

AU - Lombard-Nelsen, R. M.

AU - Marroncle, J.

AU - Maruyama, T.

AU - Meyer, W.

AU - Meziani, Z. E.

AU - Middleton, H.

AU - Morgenstern, J.

AU - Newbury, N. R.

AU - Petratos, G. G.

AU - Pitthan, R.

AU - Prepost, R.

AU - Roblin, Y.

AU - Rock, S. E.

AU - Rokni, S. H.

AU - Shapiro, G.

AU - Smith, T.

AU - Souder, P. A.

AU - Spengos, M.

AU - Staley, F.

AU - Stuart, L. M.

AU - Szalata, Z. M.

AU - Terrien, Y.

AU - Thompson, A. K.

AU - White, J. L.

AU - Woods, M.

AU - Xu, J.

AU - Young, C. C.

AU - Zapalac, G.

PY - 1996

Y1 - 1996

N2 - The neutron longitudinal and transverse asymmetries An1 and An2 have been extracted from deep inelastic scattering of polarized electrons by a polarized 3He target at incident energies of 19.42, 22.66, and 25.51 GeV. The measurement allows for the determination of the neutron spin structure functions gn1(x, Q2) and gn2(x, Q2) over the range 0.032 of 2 (GeV/c)2. The data are used for the evaluation of the Ellis-Jaffe and Bjorken sum rules. The neutron spin structure function gn1(x, Q2) is small and negative within the range of our measurement, yielding an integral ∫0.030.6gn1(x)dx=-0.028±0.006 (stat)±0.006 (syst). Assuming Regge behavior at low x, we extract Γn1=∫01gn1(x)dx=-0.031±0.006 (stat)±0.009 (syst). Combined with previous proton integral results from SLAC experiment E143, we find Γp1-Γn1=0.160±0.015 in agreement with the Bjorken sum rule prediction Γp1-Γn1=0.176±0.008 at a Q2 value of 3 (GeV/c)2 evaluated using αs=0.32±0.05.

AB - The neutron longitudinal and transverse asymmetries An1 and An2 have been extracted from deep inelastic scattering of polarized electrons by a polarized 3He target at incident energies of 19.42, 22.66, and 25.51 GeV. The measurement allows for the determination of the neutron spin structure functions gn1(x, Q2) and gn2(x, Q2) over the range 0.032 of 2 (GeV/c)2. The data are used for the evaluation of the Ellis-Jaffe and Bjorken sum rules. The neutron spin structure function gn1(x, Q2) is small and negative within the range of our measurement, yielding an integral ∫0.030.6gn1(x)dx=-0.028±0.006 (stat)±0.006 (syst). Assuming Regge behavior at low x, we extract Γn1=∫01gn1(x)dx=-0.031±0.006 (stat)±0.009 (syst). Combined with previous proton integral results from SLAC experiment E143, we find Γp1-Γn1=0.160±0.015 in agreement with the Bjorken sum rule prediction Γp1-Γn1=0.176±0.008 at a Q2 value of 3 (GeV/c)2 evaluated using αs=0.32±0.05.

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U2 - 10.1103/PhysRevD.54.6620

DO - 10.1103/PhysRevD.54.6620

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JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

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ER -

Deep inelastic scattering of polarized electrons by polarized ³He and the study of the neutron spin structure

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