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Publication Information
| Title | Precision Measurement of the Neutron Twist-3 Matrix Element dn2: Probing Color Forces | ||||
| Abstract | Double-spin asymmetries and absolute cross sections were measured at large Bjorken x (0.25 lte x lte 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 3He target. In this dedicated experiment, the spin structure function g2 on 3He was determined with precision at large x, and the neutron twist-three matrix element dn2 was measured at ?Q2? of 3.21 and 4.32 GeV2/c2, 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 ?Q2?= 5 GeV2/c2. Combining dn2 and a newly extracted twist-four matrix element, fn2, the average neutron color electric and magnetic forces were extracted and found to be of opposite sign and about 60 MeV/fm in magnitude. | ||||
| Author(s) | Matthew Posik, David Flay, Diana Parno, Kalyan Allada, Whitney Armstrong, Todd Averett, Fatiha Benmokhtar, William Bertozzi, Alexandre Camsonne, Mustafa Canan, Gordon Cates, Chunhua Chen, Jian-Ping Chen, Seonho Choi, Eugene Chudakov, Francesco Cusanno, Mark Macrae Dalton, Wouter Deconinck, Kees De Jager, Xiaoyan Deng, Alexandre Deur, Chiranjib Dutta, Lamiaa El Fassi, Gregg Franklin, Megan Friend, Haiyan Gao, Franco Garibaldi, Shalev Gilad, Ronald Gilman, Oleksandr Glamazdin, Serkan Golge, Javier Gomez, Lei Guo, Ole Hansen, Douglas Higinbotham, Tim Holmstrom, J. Huang, Charles Hyde, Hassan Abdalla, Xiaodong Jiang, Ge Jin, Joe Katich, Aidan Kelleher, Ameya Kolarkar, Wolfgang Korsch, Gerfried Kumbartzki, John LeRose, Richard Lindgren, Nilanga Liyanage, Elena Long, Alex Lukhanin, Vahe Mamyan, Dustin McNulty, Zein-Eddine Meziani, Robert Michaels, Miha Mihovilovic, Bryan Moffit, Navaphon Muangma, Sirish Nanda, Amrendra Narayan, Vladimir Nelyubin, Blaine Norum, Nuruzzaman Nuruzzaman, Yongseok Oh, Jen-chieh Peng, Xin Qian, Yi Qiang, Abdurahim Rakhman, Seamus Riordan, Arun Saha, Brad Sawatzky, Mitra Hashemi Shabestari, Albert Shahinyan, Simon Sirca, Patricia Solvignon-Slifer, Ramesh Subedi, Vincent Sulkosky, Al Tobias, Wolfgang Troth, Diancheng Wang, Y. Wang, Bogdan Wojtsekhowski, X. Yan, Huan Yao, Yunxiu Ye, Zhihong Ye, Lulin Yuan, X. Zhan, Y.-W. Zhang, Y.-W. Zhang, Bo Zhao, Xiaochao Zheng | ||||
| Publication Date | July 2014 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Exp Nuclear Physics / Experimental Halls / Hall A | ||||
| Funding Source | |||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review Letters |
| Refereed | Yes |
| Volume | 113 |
| Issue | 02 |
| Page(s) | 022002 |
Attachments/Datasets/DOI Link
| Document(s) |
1404.4003v1.pdf
(STI Document)
|
| DOI Link | |
| Dataset(s) | (none) |
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