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| 題名: | Precision measurement of the neutron twist-3 matrix element d2n: Probing color forces |
| 作者: | 彭仁傑;Posik, M;Flay, D;Parno, D S;Allada, K;Armstrong, W;Averett, T;Benmokhtar, F;Bertozzi, W;Camsonne, A;Canan, M;Cates, G D;Chen, C;Chen, J-P;Choi, S;Chudakov, E;Cusanno, F;Dalton, M M;Deconinck, W;de Jager, C W;Deng, X;Deur, A;Dutta, C;El Fassi, L;Franklin, G B;Friend, M;Gao, H;Garibaldi, F;Gilad, S;Gilman, R;Glamazdin, O;Golge, S;Gomez, J;Guo, L;Hansen, O;Higinbotham, D W;Holmstrom, T;Huang, J;Hyde, C;Ibrahim, H F;Jiang, X;Jin, G;Katich, J;Kelleher, A;Kolarkar, A;Korsch, W;Kumbartzki, G;LeRose, J J;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, J C;Qian, X;Qiang, Y;Rakhman, A;Riordan, S;Saha, A;Sawatzky, B;Shabestari, M H;Shahinyan, A;Širca, S;Solvignon, P;Subedi, R;Sulkosky, V;Tobias, W A;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 |
| 貢獻者: | 高能與強場物理研究中心 |
| 日期: | 2014-07-11 |
| 上傳時間: | 2026-04-23 12:07:05 (UTC+8) |
| 出版者: | American Physical Society;United States |
| 摘要: | 摘要： 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.
其他題名： Phys Rev Lett
出版者： United States
出版日期： 2014-07-11
出處： Physical review letters, 2014-07, Vol.113 (2), p.022002
資源來源： American Physical Society Journals
識別號： ISSN: 1079-7114
識別號： EISSN: 1079-7114
識別號： DOI: 10.1103/PhysRevLett.113.022002
識別號： PMID: 25062166 |
| 顯示於類別: | [高能與強場物理研究中心] 期刊論文
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