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| 題名: | Precision measurements of A1n in the deep inelastic regime |
| 作者: | 彭仁傑;Parno, D.S.;Flay, D.;Posik, M.;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 |
| 關鍵詞: | Nucleon structure;Parton distribution functions;Polarized electron scattering;Spin structure functions |
| 日期: | 2015-05-01 |
| 上傳時間: | 2026-04-23 12:07:14 (UTC+8) |
| 出版者: | Elsevier;Elsevier B.V |
| 摘要: | 摘要： We have performed precision measurements of the double-spin virtual-photon asymmetry A1 on the neutron in the deep inelastic scattering regime, using an open-geometry, large-acceptance spectrometer and a longitudinally and transversely polarized 3He target. Our data cover a wide kinematic range 0.277≤x≤0.548 at an average Q2 value of 3.078 (GeV/c)2, doubling the available high-precision neutron data in this x range. We have combined our results with world data on proton targets to make a leading-order extraction of the ratio of polarized-to-unpolarized parton distribution functions for up quarks and for down quarks in the same kinematic range. Our data are consistent with a previous observation of an A1n zero crossing near x=0.5. We find no evidence of a transition to a positive slope in (Δd+Δd¯)/(d+d¯) up to x=0.548.
出版者： Elsevier B.V
出版日期： 2015-05-01
出處： Physics letters. B, 2015-05, Vol.744, p.309-314
資源來源： ScienceDirect (Elsevier) Journals
版權： 2015 The Authors
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2015.03.067 |
| 顯示於類別: | [高能與強場物理研究中心] 期刊論文
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