10.1016/j.physletb.2015.03.067

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Authors

Diana S. Parno, University of Washington
David Flay, Temple University
Matthew Posik, Temple University
Kalyan C. Allada, University of Kentucky
Whitney Armstrong, Temple University
Todd Averett, College of William and Mary
Fatiha Benmokhtar, Carnegie Mellon University
William Bertozzi, Massachusetts Institute of Technology
Alexandre Camsonne, Thomas Jefferson National Accelerator Facility
Mustafa Canan, Old Dominion University
Gordon D. Cates, University of Virginia
Chunhua Chen, Hampton University
Jian-Ping Chen, College of William and Mary
Sunghyun Choi, Seoul National University
Eugene Chudakov, Thomas Jefferson National Accelerator Facility
Francesco Cusanno, Istituto Nazionale di Fisica Nucleare
Mark M. Dalton, University of Virginia
Wouter Deconick, College of William and Mary
Kees W. de Jager, Thomas Jefferson National Accelerator Facility
Xiaochao Deng, University of Virginia
Alexandre Deur, Thomas Jefferson National Accelerator Facility
Chiranjib Dutta, University of Kentucky
Lamiaa El Fassi, Rutgers University - New Brunswick/Piscataway
Gregg B. Franklin, Carnegie Mellon University
Megan Friend, Carnegie Mellon University
Haiyan Gao, Duke University
Franco Garibaldi, Istituto Nazionale di Fisica Nucleare
Shalev Gilad, Massachusetts Institute of Technology
Ronald Gilman, Thomas Jefferson National Accelerator Facility
Oleksandr Glamazdin, Kharkov Institute of Physics and Technology
Serkan Golge, Old Dominion University
Javier Gomez, Thomas Jefferson National Accelerator Facility
Lei Guo, Los Alamos National Laboratory
Ole Hansen, Thomas Jefferson National Accelerator Facility
Douglas W. Higenbotham, Thomas Jefferson National Accelerator Facility
Timothy Holmstrom, Longwood University
Jacob Huang, Massachusetts Institute of Technology
Charles Hyde, Old Dominion University
Hassan F. Ibrahim, Cairo University
Xiaodong Jiang, Rutgers University - New Brunswick/Piscataway
Ge Jin, University of Virginia
Joseph Katich, College of William and Mary
Aidan Kelleher, College of William and Mary
Ameya Kolarkar, University of Kentucky
Wolfgang Korsch, University of Kentucky
Gerfried Kumbartzki, Rutgers University - New Brunswick/Piscataway
John J. LeRose, Thomas Jefferson National Accelerator Facility
Richard Lindgren, University of Virginia
Nilanga Liyanage, University of Virginia
Elena Long, Kent State University
Alex Lukhanin, Temple University
Vahe Mamyan, Carnegie Mellon University
Dustin McNulty, University of Massachusetts Amherst
Zein-Eddine Meziani, Temple University
Robert Michaels, Thomas Jefferson National Accelerator Facility
Miha Mihovilovic, Jožef Stefan Institute
Bryan Moffit, Massachusetts Institute of Technology
Navaphon Muangma, Massachusetts Institute of Technology
Sirish Nanda, Thomas Jefferson National Accelerator Facility
Amrendra Narayan, Mississippi State University
Vladimir Nelyubin, University of Virginia
Blaine Norum, University of Virginia
Nuruzzaman Nuruzzaman, Mississippi State University
Yoomin Oh, Seoul National University
Jen-Chieh Peng, University of Illinois at Urbana-Champaign
Xin Qian, Duke University
Yi Qiang, Duke University
Abdurahim Rakhman, Syracuse University
Seamus Riordan, University of Virginia
Arun Saha, Thomas Jefferson National Accelerator Facility
Bradley Sawatzky, Thomas Jefferson National Accelerator Facility
Mitra H. Shabestari, University of Virginia
Albert Shahinyan, Thomas Jefferson National Accelerator Facility
Simon Širca, University of Ljubljana
Patricia Solvignon, Argonne National Lab
Ramesh Subedi, University of Virginia
Vincent Sulkosky, Massachusetts Institute of Technology
William A. Tobias, University of Virginia
Wolfgang Troth, Longwood University
Diancheng Wang, University of Virginia
Youcai Wang, University of Illinois at Urbana-Champaign
Bogdan Wojtsekhowski, Thomas Jefferson National Accelerator Facility
Xinhu Yan, University of Science and Technology of China
Huan Yao, Temple University
Yunxiu Ye, University of Science and Technology of China
Zhihong Ye, Thomas Jefferson National Accelerator Facility
Lulin Yuan, Hampton University
Xiaohui Zhan, Massachusetts Institute of Technology
Li Zhang, Lanzhou University
Yawei Zhang, Lanzhou University
Bo Zhao, College of William and Mary
Xiaochao Zheng, University of Virginia

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.

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This work is licensed under a Creative Commons Attribution 4.0 License.

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