Precision measurement of the proton and deuteron spin structure functions g2 and asymmetries A2

P. L. Anthony; R. G. Arnold; T. Averett; H. R. Band; N. Benmouna; W. Boeglin; H. Borel; P. E. Bosted; S. L. Bültmann; G. R. Court; D. Crabb; D. Day; P. Decowski; P. DePietro; H. Egiyan; R. Erbacher; R. Erickson; R. Fatemi; E. Frlez; K. A. Griffioen; C. Harris; E. W. Hughes; C. Hyde-Wright; G. Igo; J. Johnson; P. King; K. Kramer; S. E. Kuhn; D. Lawrence; Y. Liang; R. Lindgren; R. M. Lombard-Nelsen; P. McKee; D. E. McNulty; W. Meyer; G. S. Mitchell; J. Mitchell; M. Olson; S. Penttila; G. A. Peterson; R. Pitthan; D. Pocanic; R. Prepost; C. Prescott; B. A. Raue; D. Reyna; P. Ryan; L. S. Rochester; S. Rock; O. Rondon-Aramayo; F. Sabatie; T. Smith; L. Sorrell; S. St. Lorant; Z. Szalata; Y. Terrien; A. Tobias; T. Toole; S. Trentalange; F. R. Wesselmann; T. R. Wright; M. Zeier; H. Zhu; B. Zihlmann

doi:10.1016/S0370-2693(02)03015-0

Precision measurement of the proton and deuteron spin structure functions g₂ and asymmetries A₂

P. L. Anthony, R. G. Arnold, T. Averett, H. R. Band, N. Benmouna, W. Boeglin, H. Borel, P. E. Bosted, S. L. Bültmann, G. R. Court, D. Crabb, D. Day, P. Decowski, P. DePietro, H. Egiyan, R. Erbacher, R. Erickson, R. Fatemi, E. Frlez, K. A. GriffioenC. Harris, E. W. Hughes, C. Hyde-Wright, G. Igo, J. Johnson, P. King, K. Kramer, S. E. Kuhn, D. Lawrence, Y. Liang, R. Lindgren, R. M. Lombard-Nelsen, P. McKee, D. E. McNulty, W. Meyer, G. S. Mitchell, J. Mitchell, M. Olson, S. Penttila, G. A. Peterson, R. Pitthan, D. Pocanic, R. Prepost, C. Prescott, B. A. Raue, D. Reyna, P. Ryan, L. S. Rochester, S. Rock, O. Rondon-Aramayo, F. Sabatie, T. Smith, L. Sorrell, S. St. Lorant, Z. Szalata, Y. Terrien, A. Tobias, T. Toole, S. Trentalange, F. R. Wesselmann, T. R. Wright, M. Zeier, H. Zhu, B. Zihlmann

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185 Scopus citations

Abstract

We have measured the spin structure functions g₂^p and g₂^d and the virtual photon asymmetries A₂^p and A₂^d over the kinematic range 0.02 ≤ x ≤ 0.8 and 0.7 ≤ Q² ≤ 20 GeV² by scattering 29.1 and 32.3 GeV longitudinally polarized electrons from transversely polarized NH₃ and ⁶LiD targets. Our measured g₂ approximately follows the twist-2 Wandzura-Wilczek calculation. The twist-3 reduced matrix elements d₂^p and d₂ⁿ are less than two standard deviations from zero. The data are inconsistent with the Burkhardt-Cottingham sum rule if there is no pathological behavior as x → 0. The Efremov-Leader-Teryaev integral is consistent with zero within our measured kinematic range. The absolute value of A₂ is significantly smaller than the A₂ < √R(1 + A₁)/2 limit.

Original language	English
Pages (from-to)	18-24
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	553
Issue number	1-2
DOIs	https://doi.org/10.1016/S0370-2693(02)03015-0
State	Published - Jan 30 2003

Bibliographical note

Funding Information:
We thank the personnel of the SLAC accelerator and Experimental Facilities Departments for their efforts which resulted in the successful completion of the E155X experiment. This work was supported by the Department of Energy; the National Science Foundation; and the Centre National de la Recherche Scientifique and the Commissariat a l'Energie Atomique (French groups).

Funding

We thank the personnel of the SLAC accelerator and Experimental Facilities Departments for their efforts which resulted in the successful completion of the E155X experiment. This work was supported by the Department of Energy; the National Science Foundation; and the Centre National de la Recherche Scientifique and the Commissariat a l'Energie Atomique (French groups).

Funders	Funder number
Commissariat a l'Energie Atomique (CEA)
National Science Foundation (NSF)
Michigan State University-U.S. Department of Energy (MSU-DOE) Plant Research Laboratory
Directorate for Mathematical and Physical Sciences	9971942
CNRS Centre National de la Recherche Scientifique

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/S0370-2693(02)03015-0

Cite this

Anthony, P. L., Arnold, R. G., Averett, T., Band, H. R., Benmouna, N., Boeglin, W., Borel, H., Bosted, P. E., Bültmann, S. L., Court, G. R., Crabb, D., Day, D., Decowski, P., DePietro, P., Egiyan, H., Erbacher, R., Erickson, R., Fatemi, R., Frlez, E., ... Zihlmann, B. (2003). Precision measurement of the proton and deuteron spin structure functions g₂ and asymmetries A₂. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 553(1-2), 18-24. https://doi.org/10.1016/S0370-2693(02)03015-0

@article{730e28be92b546dbb4d0689b8028cf01,

title = "Precision measurement of the proton and deuteron spin structure functions g2 and asymmetries A2",

abstract = "We have measured the spin structure functions g2p and g2d and the virtual photon asymmetries A2p and A2d over the kinematic range 0.02 ≤ x ≤ 0.8 and 0.7 ≤ Q2 ≤ 20 GeV2 by scattering 29.1 and 32.3 GeV longitudinally polarized electrons from transversely polarized NH3 and 6LiD targets. Our measured g2 approximately follows the twist-2 Wandzura-Wilczek calculation. The twist-3 reduced matrix elements d2p and d2n are less than two standard deviations from zero. The data are inconsistent with the Burkhardt-Cottingham sum rule if there is no pathological behavior as x → 0. The Efremov-Leader-Teryaev integral is consistent with zero within our measured kinematic range. The absolute value of A2 is significantly smaller than the A2 < √R(1 + A1)/2 limit.",

author = "Anthony, {P. L.} and Arnold, {R. G.} and T. Averett and Band, {H. R.} and N. Benmouna and W. Boeglin and H. Borel and Bosted, {P. E.} and B{\"u}ltmann, {S. L.} and Court, {G. R.} and D. Crabb and D. Day and P. Decowski and P. DePietro and H. Egiyan and R. Erbacher and R. Erickson and R. Fatemi and E. Frlez and Griffioen, {K. A.} and C. Harris and Hughes, {E. W.} and C. Hyde-Wright and G. Igo and J. Johnson and P. King and K. Kramer and Kuhn, {S. E.} and D. Lawrence and Y. Liang and R. Lindgren and Lombard-Nelsen, {R. M.} and P. McKee and McNulty, {D. E.} and W. Meyer and Mitchell, {G. S.} and J. Mitchell and M. Olson and S. Penttila and Peterson, {G. A.} and R. Pitthan and D. Pocanic and R. Prepost and C. Prescott and Raue, {B. A.} and D. Reyna and P. Ryan and Rochester, {L. S.} and S. Rock and O. Rondon-Aramayo and F. Sabatie and T. Smith and L. Sorrell and {St. Lorant}, S. and Z. Szalata and Y. Terrien and A. Tobias and T. Toole and S. Trentalange and Wesselmann, {F. R.} and Wright, {T. R.} and M. Zeier and H. Zhu and B. Zihlmann",

note = "Funding Information: We thank the personnel of the SLAC accelerator and Experimental Facilities Departments for their efforts which resulted in the successful completion of the E155X experiment. This work was supported by the Department of Energy; the National Science Foundation; and the Centre National de la Recherche Scientifique and the Commissariat a l'Energie Atomique (French groups).",

year = "2003",

month = jan,

day = "30",

doi = "10.1016/S0370-2693(02)03015-0",

language = "English",

volume = "553",

pages = "18--24",

number = "1-2",

}

Anthony, PL, Arnold, RG, Averett, T, Band, HR, Benmouna, N, Boeglin, W, Borel, H, Bosted, PE, Bültmann, SL, Court, GR, Crabb, D, Day, D, Decowski, P, DePietro, P, Egiyan, H, Erbacher, R, Erickson, R, Fatemi, R, Frlez, E, Griffioen, KA, Harris, C, Hughes, EW, Hyde-Wright, C, Igo, G, Johnson, J, King, P, Kramer, K, Kuhn, SE, Lawrence, D, Liang, Y, Lindgren, R, Lombard-Nelsen, RM, McKee, P, McNulty, DE, Meyer, W, Mitchell, GS, Mitchell, J, Olson, M, Penttila, S, Peterson, GA, Pitthan, R, Pocanic, D, Prepost, R, Prescott, C, Raue, BA, Reyna, D, Ryan, P, Rochester, LS, Rock, S, Rondon-Aramayo, O, Sabatie, F, Smith, T, Sorrell, L, St. Lorant, S, Szalata, Z, Terrien, Y, Tobias, A, Toole, T, Trentalange, S, Wesselmann, FR, Wright, TR, Zeier, M, Zhu, H & Zihlmann, B 2003, 'Precision measurement of the proton and deuteron spin structure functions g₂ and asymmetries A₂', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 553, no. 1-2, pp. 18-24. https://doi.org/10.1016/S0370-2693(02)03015-0

TY - JOUR

T1 - Precision measurement of the proton and deuteron spin structure functions g2 and asymmetries A2

AU - Anthony, P. L.

AU - Arnold, R. G.

AU - Averett, T.

AU - Band, H. R.

AU - Benmouna, N.

AU - Boeglin, W.

AU - Borel, H.

AU - Bosted, P. E.

AU - Bültmann, S. L.

AU - Court, G. R.

AU - Crabb, D.

AU - Day, D.

AU - Decowski, P.

AU - DePietro, P.

AU - Egiyan, H.

AU - Erbacher, R.

AU - Erickson, R.

AU - Fatemi, R.

AU - Frlez, E.

AU - Griffioen, K. A.

AU - Harris, C.

AU - Hughes, E. W.

AU - Hyde-Wright, C.

AU - Igo, G.

AU - Johnson, J.

AU - King, P.

AU - Kramer, K.

AU - Kuhn, S. E.

AU - Lawrence, D.

AU - Liang, Y.

AU - Lindgren, R.

AU - Lombard-Nelsen, R. M.

AU - McKee, P.

AU - McNulty, D. E.

AU - Meyer, W.

AU - Mitchell, G. S.

AU - Mitchell, J.

AU - Olson, M.

AU - Penttila, S.

AU - Peterson, G. A.

AU - Pitthan, R.

AU - Pocanic, D.

AU - Prepost, R.

AU - Prescott, C.

AU - Raue, B. A.

AU - Reyna, D.

AU - Ryan, P.

AU - Rochester, L. S.

AU - Rock, S.

AU - Rondon-Aramayo, O.

AU - Sabatie, F.

AU - Smith, T.

AU - Sorrell, L.

AU - St. Lorant, S.

AU - Szalata, Z.

AU - Terrien, Y.

AU - Tobias, A.

AU - Toole, T.

AU - Trentalange, S.

AU - Wesselmann, F. R.

AU - Wright, T. R.

AU - Zeier, M.

AU - Zhu, H.

AU - Zihlmann, B.

N1 - Funding Information: We thank the personnel of the SLAC accelerator and Experimental Facilities Departments for their efforts which resulted in the successful completion of the E155X experiment. This work was supported by the Department of Energy; the National Science Foundation; and the Centre National de la Recherche Scientifique and the Commissariat a l'Energie Atomique (French groups).

PY - 2003/1/30

Y1 - 2003/1/30

N2 - We have measured the spin structure functions g2p and g2d and the virtual photon asymmetries A2p and A2d over the kinematic range 0.02 ≤ x ≤ 0.8 and 0.7 ≤ Q2 ≤ 20 GeV2 by scattering 29.1 and 32.3 GeV longitudinally polarized electrons from transversely polarized NH3 and 6LiD targets. Our measured g2 approximately follows the twist-2 Wandzura-Wilczek calculation. The twist-3 reduced matrix elements d2p and d2n are less than two standard deviations from zero. The data are inconsistent with the Burkhardt-Cottingham sum rule if there is no pathological behavior as x → 0. The Efremov-Leader-Teryaev integral is consistent with zero within our measured kinematic range. The absolute value of A2 is significantly smaller than the A2 < √R(1 + A1)/2 limit.

AB - We have measured the spin structure functions g2p and g2d and the virtual photon asymmetries A2p and A2d over the kinematic range 0.02 ≤ x ≤ 0.8 and 0.7 ≤ Q2 ≤ 20 GeV2 by scattering 29.1 and 32.3 GeV longitudinally polarized electrons from transversely polarized NH3 and 6LiD targets. Our measured g2 approximately follows the twist-2 Wandzura-Wilczek calculation. The twist-3 reduced matrix elements d2p and d2n are less than two standard deviations from zero. The data are inconsistent with the Burkhardt-Cottingham sum rule if there is no pathological behavior as x → 0. The Efremov-Leader-Teryaev integral is consistent with zero within our measured kinematic range. The absolute value of A2 is significantly smaller than the A2 < √R(1 + A1)/2 limit.

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U2 - 10.1016/S0370-2693(02)03015-0

DO - 10.1016/S0370-2693(02)03015-0

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SN - 0370-2693

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EP - 24

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

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

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