Physics Letters B (May 2015)
Precision measurements of A1n in the deep inelastic regime
- D.S. Parno,
- D. Flay,
- M. Posik,
- K. Allada,
- W. Armstrong,
- T. Averett,
- F. Benmokhtar,
- W. Bertozzi,
- A. Camsonne,
- M. Canan,
- G.D. Cates,
- C. Chen,
- J.-P. Chen,
- S. Choi,
- E. Chudakov,
- F. Cusanno,
- M.M. Dalton,
- W. Deconinck,
- C.W. de Jager,
- X. Deng,
- A. Deur,
- C. Dutta,
- L. El Fassi,
- G.B. Franklin,
- M. Friend,
- H. Gao,
- F. Garibaldi,
- S. Gilad,
- R. Gilman,
- O. Glamazdin,
- S. Golge,
- J. Gomez,
- L. Guo,
- O. Hansen,
- D.W. Higinbotham,
- T. Holmstrom,
- J. Huang,
- C. Hyde,
- H.F. Ibrahim,
- X. Jiang,
- G. Jin,
- J. Katich,
- A. Kelleher,
- A. Kolarkar,
- W. Korsch,
- G. Kumbartzki,
- J.J. LeRose,
- R. Lindgren,
- N. Liyanage,
- E. Long,
- A. Lukhanin,
- V. Mamyan,
- D. McNulty,
- Z.-E. Meziani,
- R. Michaels,
- M. Mihovilovič,
- B. Moffit,
- N. Muangma,
- S. Nanda,
- A. Narayan,
- V. Nelyubin,
- B. Norum,
- Nuruzzaman,
- Y. Oh,
- J.C. Peng,
- X. Qian,
- Y. Qiang,
- A. Rakhman,
- S. Riordan,
- A. Saha,
- B. Sawatzky,
- M.H. Shabestari,
- A. Shahinyan,
- S. Širca,
- P. Solvignon,
- R. Subedi,
- V. Sulkosky,
- W.A. Tobias,
- W. Troth,
- D. Wang,
- Y. Wang,
- B. Wojtsekhowski,
- X. Yan,
- H. Yao,
- Y. Ye,
- Z. Ye,
- L. Yuan,
- X. Zhan,
- Y. Zhang,
- Y.-W. Zhang,
- B. Zhao,
- X. Zheng
Affiliations
- D.S. Parno
- Carnegie Mellon University, Pittsburgh, PA 15213, United States; Center for Experimental Nuclear Physics and Astrophysics and Department of Physics, University of Washington, Seattle, WA 98195, United States; Corresponding author at: Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, WA 98195, United States. Tel.: +1 206 543 4035; fax: +1 206 685 4634.
- D. Flay
- Temple University, Philadelphia, PA 19122, United States; University of Massachusetts, Amherst, MA 01003, United States
- M. Posik
- Temple University, Philadelphia, PA 19122, United States
- K. Allada
- University of Kentucky, Lexington, KY 40506, United States
- W. Armstrong
- Temple University, Philadelphia, PA 19122, United States
- T. Averett
- College of William and Mary, Williamsburg, VA 23187, United States
- F. Benmokhtar
- Carnegie Mellon University, Pittsburgh, PA 15213, United States
- W. Bertozzi
- Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- A. Camsonne
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- M. Canan
- Old Dominion University, Norfolk, VA 23529, United States
- G.D. Cates
- University of Virginia, Charlottesville, VA 22904, United States
- C. Chen
- Hampton University, Hampton, VA 23187, United States
- J.-P. Chen
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- S. Choi
- Seoul National University, Seoul 151-742, South Korea
- E. Chudakov
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- F. Cusanno
- INFN, Sezione di Roma, I-00161 Rome, Italy; Istituto Superiore di Sanità, I-00161 Rome, Italy
- M.M. Dalton
- University of Virginia, Charlottesville, VA 22904, United States
- W. Deconinck
- Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- C.W. de Jager
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States; University of Virginia, Charlottesville, VA 22904, United States
- X. Deng
- University of Virginia, Charlottesville, VA 22904, United States
- A. Deur
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- C. Dutta
- University of Kentucky, Lexington, KY 40506, United States
- L. El Fassi
- Rutgers, The State University of New Jersey, Piscataway, NJ 08855, United States; Mississippi State University, MS 39762, United States
- G.B. Franklin
- Carnegie Mellon University, Pittsburgh, PA 15213, United States
- M. Friend
- Carnegie Mellon University, Pittsburgh, PA 15213, United States
- H. Gao
- Duke University, Durham, NC 27708, United States
- F. Garibaldi
- INFN, Sezione di Roma, I-00161 Rome, Italy
- S. Gilad
- Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- R. Gilman
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States; Rutgers, The State University of New Jersey, Piscataway, NJ 08855, United States
- O. Glamazdin
- Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine
- S. Golge
- Old Dominion University, Norfolk, VA 23529, United States
- J. Gomez
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- L. Guo
- Los Alamos National Laboratory, Los Alamos, NM 87545, United States
- O. Hansen
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- D.W. Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- T. Holmstrom
- Longwood University, Farmville, VA 23909, United States
- J. Huang
- Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- C. Hyde
- Old Dominion University, Norfolk, VA 23529, United States; Université Blaise Pascal/IN2P3, F-63177 Aubière, France
- H.F. Ibrahim
- Cairo University, Giza 12613, Egypt
- X. Jiang
- Rutgers, The State University of New Jersey, Piscataway, NJ 08855, United States; Los Alamos National Laboratory, Los Alamos, NM 87545, United States
- G. Jin
- University of Virginia, Charlottesville, VA 22904, United States
- J. Katich
- College of William and Mary, Williamsburg, VA 23187, United States
- A. Kelleher
- College of William and Mary, Williamsburg, VA 23187, United States
- A. Kolarkar
- University of Kentucky, Lexington, KY 40506, United States
- W. Korsch
- University of Kentucky, Lexington, KY 40506, United States
- G. Kumbartzki
- Rutgers, The State University of New Jersey, Piscataway, NJ 08855, United States
- J.J. LeRose
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- R. Lindgren
- University of Virginia, Charlottesville, VA 22904, United States
- N. Liyanage
- University of Virginia, Charlottesville, VA 22904, United States
- E. Long
- Kent State University, Kent, OH 44242, United States
- A. Lukhanin
- Temple University, Philadelphia, PA 19122, United States
- V. Mamyan
- Carnegie Mellon University, Pittsburgh, PA 15213, United States
- D. McNulty
- University of Massachusetts, Amherst, MA 01003, United States
- Z.-E. Meziani
- Temple University, Philadelphia, PA 19122, United States
- R. Michaels
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- M. Mihovilovič
- Jožef Stefan Institute, Ljubljana, Slovenia
- B. Moffit
- Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- N. Muangma
- Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- S. Nanda
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- A. Narayan
- Mississippi State University, MS 39762, United States
- V. Nelyubin
- University of Virginia, Charlottesville, VA 22904, United States
- B. Norum
- University of Virginia, Charlottesville, VA 22904, United States
- Nuruzzaman
- Mississippi State University, MS 39762, United States
- Y. Oh
- Seoul National University, Seoul 151-742, South Korea
- J.C. Peng
- University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States
- X. Qian
- Duke University, Durham, NC 27708, United States; Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, CA 91125, United States
- Y. Qiang
- Duke University, Durham, NC 27708, United States; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- A. Rakhman
- Syracuse University, Syracuse, NY 13244, United States
- S. Riordan
- University of Virginia, Charlottesville, VA 22904, United States; University of Massachusetts, Amherst, MA 01003, United States
- A. Saha
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- B. Sawatzky
- Temple University, Philadelphia, PA 19122, United States; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- M.H. Shabestari
- University of Virginia, Charlottesville, VA 22904, United States
- A. Shahinyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
- S. Širca
- University of Ljubljana, SI-1000 Ljubljana, Slovenia; Jožef Stefan Institute, Ljubljana, Slovenia
- P. Solvignon
- Argonne National Lab, Argonne, IL 60439, United States; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- R. Subedi
- University of Virginia, Charlottesville, VA 22904, United States
- V. Sulkosky
- Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- W.A. Tobias
- University of Virginia, Charlottesville, VA 22904, United States
- W. Troth
- Longwood University, Farmville, VA 23909, United States
- D. Wang
- University of Virginia, Charlottesville, VA 22904, United States
- Y. Wang
- University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States
- B. Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States
- X. Yan
- University of Science and Technology of China, Hefei 230026, People's Republic of China
- H. Yao
- Temple University, Philadelphia, PA 19122, United States; College of William and Mary, Williamsburg, VA 23187, United States
- Y. Ye
- University of Science and Technology of China, Hefei 230026, People's Republic of China
- Z. Ye
- Hampton University, Hampton, VA 23187, United States
- L. Yuan
- Hampton University, Hampton, VA 23187, United States
- X. Zhan
- Massachusetts Institute of Technology, Cambridge, MA 02139, United States
- Y. Zhang
- Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China
- Y.-W. Zhang
- Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China; Rutgers, The State University of New Jersey, Piscataway, NJ 08855, United States
- B. Zhao
- College of William and Mary, Williamsburg, VA 23187, United States
- X. Zheng
- University of Virginia, Charlottesville, VA 22904, United States
- Journal volume & issue
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Vol. 744
pp. 309 – 314
Abstract
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. Keywords: Spin structure functions, Nucleon structure, Parton distribution functions, Polarized electron scattering
