Document Type
Article
Department/Program
Physics
Publication Date
5-11-2015
Journal
Physics Letters B
Volume
744
First Page
309
Last Page
314
Abstract
We have performed precision measurements of the double-spin virtual-photon asymmetry A1A1 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≤0.5480.277≤x≤0.548 at an average Q2Q2 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 anA1n zero crossing near x=0.5x=0.5. We find no evidence of a transition to a positive slope in(Δd+Δd¯)/(d+d¯) up to x=0.548x=0.548.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Sponsor
Open Access funded by SCOAP³
Recommended Citation
Parno, Diana S.; Flay, David; Posik, Matthew; Allada, Kalyan C.; Armstrong, Whitney; Averett, Todd; Benmokhtar, Fatiha; Bertozzi, William; Camsonne, Alexandre; Canan, Mustafa; Cates, Gordon D.; Chen, Chunhua; Chen, Jian-Ping; Choi, Sunghyun; Chudakov, Eugene; Cusanno, Francesco; Dalton, Mark M.; Deconick, Wouter; de Jager, Kees W.; Deng, Xiaochao; Deur, Alexandre; Dutta, Chiranjib; El Fassi, Lamiaa; Franklin, Gregg B.; Friend, Megan; Gao, Haiyan; Garibaldi, Franco; Gilad, Shalev; Gilman, Ronald; Glamazdin, Oleksandr; Golge, Serkan; Gomez, Javier; Guo, Lei; Hansen, Ole; Higenbotham, Douglas W.; Holmstrom, Timothy; Huang, Jacob; Hyde, Charles; Ibrahim, Hassan F.; Jiang, Xiaodong; Jin, Ge; Katich, Joseph; Kelleher, Aidan; Kolarkar, Ameya; Korsch, Wolfgang; Kumbartzki, Gerfried; LeRose, John J.; Lindgren, Richard; Liyanage, Nilanga; Long, Elena; Lukhanin, Alex; Mamyan, Vahe; McNulty, Dustin; Meziani, Zein-Eddine; Michaels, Robert; Mihovilovic, Miha; Moffit, Bryan; Muangma, Navaphon; Nanda, Sirish; Narayan, Amrendra; Nelyubin, Vladimir; Norum, Blaine; Nuruzzaman, Nuruzzaman; Oh, Yoomin; Peng, Jen-Chieh; Qian, Xin; Qiang, Yi; Rakhman, Abdurahim; Riordan, Seamus; Saha, Arun; Sawatzky, Bradley; Shabestari, Mitra H.; Shahinyan, Albert; Širca, Simon; Solvignon, Patricia; Subedi, Ramesh; Sulkosky, Vincent; Tobias, William A.; Troth, Wolfgang; Wang, Diancheng; Wang, Youcai; Wojtsekhowski, Bogdan; Yan, Xinhu; Yao, Huan; Ye, Yunxiu; Ye, Zhihong; Yuan, Lulin; Zhan, Xiaohui; Zhang, Li; Zhang, Yawei; Zhao, Bo; and Zheng, Xiaochao, "Precision measurements of A1N in the deep inelastic regime" (2015). Articles. 20.
https://scholarworks.wm.edu/articles/20
