Measurements of d2n and A1n: Probing the neutron spin structure

Jefferson Lab Hall A Collaboration

doi:10.1103/PhysRevD.94.052003

Measurements of d2n and A1n: Probing the neutron spin structure

Jefferson Lab Hall A Collaboration

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Abstract

We report on the results of the E06-014 experiment performed at Jefferson Lab in Hall A, where a precision measurement of the twist-3 matrix element d2 of the neutron (d2n) was conducted. The quantity d2n represents the average color Lorentz force a struck quark experiences in a deep inelastic electron scattering event off a neutron due to its interaction with the hadronizing remnants. This color force was determined from a linear combination of the third moments of the He3 spin structure functions, g1 and g2, after nuclear corrections had been applied to these moments. The structure functions were obtained from a measurement of the unpolarized cross section and of double-spin asymmetries in the scattering of a longitudinally polarized electron beam from a transversely and a longitudinally polarized He3 target. The measurement kinematics included two average Q2 bins of 3.2 GeV2 and 4.3 GeV2, and Bjorken-x 0.25≤x≤0.90 covering the deep inelastic and resonance regions.

Original language	English
Article number	052003
Journal	Physical Review D
Volume	94
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.94.052003
State	Published - Sep 6 2016
Externally published	Yes

Funding

This material is based upon work supported by the U.S. Department of Energy (DOE) Office of Science under Awards No. DE-FG02-94ER40844 and No. DE-FG02-87ER40315. Jefferson Lab is operated by the Jefferson Science Associates, LLC, under DOE Grant No. DE-AC05-060R23177.

Funders	Funder number
National Science Foundation	1405857, 1306126
U.S. Department of Energy
Office of Science	DE-FG02-87ER40315, DE-AC05-060R23177, DE-FG02-94ER40844

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10.1103/PhysRevD.94.052003

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@article{a6fcd205433943308471e6e3fbd59ba1,

title = "Measurements of d2n and A1n: Probing the neutron spin structure",

abstract = "We report on the results of the E06-014 experiment performed at Jefferson Lab in Hall A, where a precision measurement of the twist-3 matrix element d2 of the neutron (d2n) was conducted. The quantity d2n represents the average color Lorentz force a struck quark experiences in a deep inelastic electron scattering event off a neutron due to its interaction with the hadronizing remnants. This color force was determined from a linear combination of the third moments of the He3 spin structure functions, g1 and g2, after nuclear corrections had been applied to these moments. The structure functions were obtained from a measurement of the unpolarized cross section and of double-spin asymmetries in the scattering of a longitudinally polarized electron beam from a transversely and a longitudinally polarized He3 target. The measurement kinematics included two average Q2 bins of 3.2 GeV2 and 4.3 GeV2, and Bjorken-x 0.25≤x≤0.90 covering the deep inelastic and resonance regions.",

author = "{Jefferson Lab Hall A Collaboration} and D. Flay and M. Posik and Parno, {D. S.} and K. Allada and Armstrong, {W. R.} and T. Averett and F. Benmokhtar and W. Bertozzi and A. Camsonne and M. Canan and Cates, {G. D.} and C. Chen and Chen, {J. P.} and S. Choi and E. Chudakov and F. Cusanno and Dalton, {M. M.} and W. Deconinck and {De Jager}, {C. W.} and X. Deng and A. Deur and C. Dutta and Fassi, {L. El} and Franklin, {G. B.} and M. Friend and H. Gao and F. Garibaldi and S. Gilad and R. Gilman and O. Glamazdin and S. Golge and J. Gomez and L. Guo and O. Hansen and Higinbotham, {D. W.} and T. Holmstrom and J. Huang and C. Hyde and Ibrahim, {H. F.} and X. Jiang and G. Jin and J. Katich and A. Kelleher and A. Kolarkar and W. Korsch and G. Kumbartzki and LeRose, {J. J.} and R. Lindgren and N. Liyanage and A. Rakhman",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

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doi = "10.1103/PhysRevD.94.052003",

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TY - JOUR

T1 - Measurements of d2n and A1n

T2 - Probing the neutron spin structure

AU - Jefferson Lab Hall A Collaboration

AU - Flay, D.

AU - Posik, M.

AU - Parno, D. S.

AU - Allada, K.

AU - Armstrong, W. R.

AU - Averett, T.

AU - Benmokhtar, F.

AU - Bertozzi, W.

AU - Camsonne, A.

AU - Canan, M.

AU - Cates, G. D.

AU - Chen, C.

AU - Chen, J. P.

AU - Choi, S.

AU - Chudakov, E.

AU - Cusanno, F.

AU - Dalton, M. M.

AU - Deconinck, W.

AU - De Jager, C. W.

AU - Deng, X.

AU - Deur, A.

AU - Dutta, C.

AU - Fassi, L. El

AU - Franklin, G. B.

AU - Friend, M.

AU - Gao, H.

AU - Garibaldi, F.

AU - Gilad, S.

AU - Gilman, R.

AU - Glamazdin, O.

AU - Golge, S.

AU - Gomez, J.

AU - Guo, L.

AU - Hansen, O.

AU - Higinbotham, D. W.

AU - Holmstrom, T.

AU - Huang, J.

AU - Hyde, C.

AU - Ibrahim, H. F.

AU - Jiang, X.

AU - Jin, G.

AU - Katich, J.

AU - Kelleher, A.

AU - Kolarkar, A.

AU - Korsch, W.

AU - Kumbartzki, G.

AU - LeRose, J. J.

AU - Lindgren, R.

AU - Liyanage, N.

AU - Rakhman, A.

PY - 2016/9/6

Y1 - 2016/9/6

N2 - We report on the results of the E06-014 experiment performed at Jefferson Lab in Hall A, where a precision measurement of the twist-3 matrix element d2 of the neutron (d2n) was conducted. The quantity d2n represents the average color Lorentz force a struck quark experiences in a deep inelastic electron scattering event off a neutron due to its interaction with the hadronizing remnants. This color force was determined from a linear combination of the third moments of the He3 spin structure functions, g1 and g2, after nuclear corrections had been applied to these moments. The structure functions were obtained from a measurement of the unpolarized cross section and of double-spin asymmetries in the scattering of a longitudinally polarized electron beam from a transversely and a longitudinally polarized He3 target. The measurement kinematics included two average Q2 bins of 3.2 GeV2 and 4.3 GeV2, and Bjorken-x 0.25≤x≤0.90 covering the deep inelastic and resonance regions.

AB - We report on the results of the E06-014 experiment performed at Jefferson Lab in Hall A, where a precision measurement of the twist-3 matrix element d2 of the neutron (d2n) was conducted. The quantity d2n represents the average color Lorentz force a struck quark experiences in a deep inelastic electron scattering event off a neutron due to its interaction with the hadronizing remnants. This color force was determined from a linear combination of the third moments of the He3 spin structure functions, g1 and g2, after nuclear corrections had been applied to these moments. The structure functions were obtained from a measurement of the unpolarized cross section and of double-spin asymmetries in the scattering of a longitudinally polarized electron beam from a transversely and a longitudinally polarized He3 target. The measurement kinematics included two average Q2 bins of 3.2 GeV2 and 4.3 GeV2, and Bjorken-x 0.25≤x≤0.90 covering the deep inelastic and resonance regions.

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DO - 10.1103/PhysRevD.94.052003

M3 - Article

AN - SCOPUS:84994692109

SN - 2470-0010

VL - 94

JO - Physical Review D

JF - Physical Review D

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M1 - 052003

ER -

Measurements of d2n and A1n: Probing the neutron spin structure

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