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Precision measurement of the neutron twist-3 matrix element d(2)(n): probing color forces.

Publication ,  Journal Article
Posik, M; Flay, D; Parno, DS; Allada, K; Armstrong, W; Averett, T; Benmokhtar, F; Bertozzi, W; Camsonne, A; Canan, M; Cates, GD; Chen, C ...
Published in: Physical review letters
July 2014
Published version (DOI)

Double-spin asymmetries and absolute cross sections were measured at large Bjorken x  (0.25≤x≤0.90), in both the deep-inelastic and resonance regions, by scattering longitudinally polarized electrons at beam energies of 4.7 and 5.9 GeV from a transversely and longitudinally polarized (3)He target. In this dedicated experiment, the spin structure function g(2)((3)He) was determined with precision at large x, and the neutron twist-3 matrix element d(2)(n) was measured at ⟨Q(2)⟩ of 3.21 and 4.32  GeV(2)/c(2), with an absolute precision of about 10(-5). Our results are found to be in agreement with lattice QCD calculations and resolve the disagreement found with previous data at ⟨Q(2)⟩=5  GeV(2)/c(2). Combining d(2)(n) and a newly extracted twist-4 matrix element f(2)(n), the average neutron color electric and magnetic forces were extracted and found to be of opposite sign and about 30  MeV/fm in magnitude.

Duke Scholars

Haiyan Gao
Author Haiyan Gao Physics
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Published In

Physical review letters

DOI

10.1103/physrevlett.113.022002

EISSN

1079-7114

ISSN

0031-9007

Publication Date

July 2014

Volume

113

Issue

2

Start / End Page

022002

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

Citation

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Posik, M., Flay, D., Parno, D. S., Allada, K., Armstrong, W., Averett, T., … Jefferson Lab Hall A Collaboration, . (2014). Precision measurement of the neutron twist-3 matrix element d(2)(n): probing color forces. Physical Review Letters, 113(2), 022002. https://doi.org/10.1103/physrevlett.113.022002
Posik, M., D. Flay, D. S. Parno, K. Allada, W. Armstrong, T. Averett, F. Benmokhtar, et al. “Precision measurement of the neutron twist-3 matrix element d(2)(n): probing color forces.” Physical Review Letters 113, no. 2 (July 2014): 022002. https://doi.org/10.1103/physrevlett.113.022002.
Posik M, Flay D, Parno DS, Allada K, Armstrong W, Averett T, et al. Precision measurement of the neutron twist-3 matrix element d(2)(n): probing color forces. Physical review letters. 2014 Jul;113(2):022002.
Posik, M., et al. “Precision measurement of the neutron twist-3 matrix element d(2)(n): probing color forces.” Physical Review Letters, vol. 113, no. 2, July 2014, p. 022002. Epmc, doi:10.1103/physrevlett.113.022002.
Posik M, Flay D, Parno DS, Allada K, Armstrong W, Averett T, Benmokhtar F, Bertozzi W, Camsonne A, Canan M, Cates GD, Chen C, Chen J-P, Choi S, Chudakov E, Cusanno F, Dalton MM, Deconinck W, de Jager CW, Deng X, Deur A, Dutta C, El Fassi L, Franklin GB, Friend M, Gao H, Garibaldi F, Gilad S, Gilman R, Glamazdin O, Golge S, Gomez J, Guo L, Hansen O, Higinbotham DW, Holmstrom T, Huang J, Hyde C, Ibrahim HF, Jiang X, Jin G, Katich J, Kelleher A, Kolarkar A, Korsch W, Kumbartzki G, LeRose JJ, Lindgren R, Liyanage N, Long E, Lukhanin A, Mamyan V, McNulty D, Meziani Z-E, Michaels R, Mihovilovič M, Moffit B, Muangma N, Nanda S, Narayan A, Nelyubin V, Norum B, Nuruzzaman, Oh Y, Peng JC, Qian X, Qiang Y, Rakhman A, Riordan S, Saha A, Sawatzky B, Shabestari MH, Shahinyan A, Širca S, Solvignon P, Subedi R, Sulkosky V, Tobias WA, Troth W, Wang D, Wang Y, Wojtsekhowski B, Yan X, Yao H, Ye Y, Ye Z, Yuan L, Zhan X, Zhang Y, Zhang Y-W, Zhao B, Zheng X, Jefferson Lab Hall A Collaboration. Precision measurement of the neutron twist-3 matrix element d(2)(n): probing color forces. Physical review letters. 2014 Jul;113(2):022002.

Published In

Physical review letters

DOI

10.1103/physrevlett.113.022002

EISSN

1079-7114

ISSN

0031-9007

Publication Date

July 2014

Volume

113

Issue

2

Start / End Page

022002

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences