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Precision Measurements of the Nucleon Strange Form Factors at Q2∼0.1  GeV^2
Physical Review Letters (2007)
  • A. Acha
  • K. A. Aniol
  • D. S. Armstrong
  • J. Arrington
  • T. Averett
  • S. L. Bailey
  • J. Barber
  • A. Beck
  • H. Benaoum
  • J. Benesch
  • P. Y. Bertin
  • P. Bosted
  • F. Butaru
  • E. Burtin
  • G. D. Cates
  • Y. C. Chao
  • J. P. Chen
  • E. Chudakov
  • E. Cisbani
  • B. Craver
  • F. Cusanno
  • R. De Leo
  • P. Decowski
  • A. Deur
  • R. J. Feuerbach
  • J. M. Finn
  • S. Frullani
  • S. A. Fuchs
  • K. Fuoti
  • R. Gilman
  • L. E. Glesener
  • K. Grimm
  • J. M. Grames
  • J. O. Hansen
  • J. Hansknecht
  • D. W. Higinbotham
  • R. Holmes
  • T. Holmstrom
  • H. Ibrahim
  • C. W. de Jager
  • X. Jiang
  • J. Katich
  • L. J. Kaufman
  • A. Kelleher
  • P. M. King
  • A. Kolarkar
  • S. Kowalksi
  • E. Kuchina
  • Krishna Kumar, University of Massachusetts - Amherst
  • L. Lagamba
  • P. LaViolette
  • J. LeRose
  • R. A. Lindgren
  • D. Lhuillier
  • N. Liyanage
  • D. J. Margaziotis
  • P. Markowitz
  • D. G. Meekins
  • Z. E. Meziani
  • R. Michaels
  • B. Mofit
  • S. Nanda
  • V. Nelyubin
  • K. Otis
  • K. D. Paschke
  • S. K. Phillips
  • M. Poelker
  • R. Pomatsalyuk
  • M. Potokar
  • Y. Prok
  • A. Puckett
  • X. Qian
  • Y. Qiang
  • B. Reitz
  • J. Roche
  • A. Saha
  • B. Sawatzky
  • J. Singh
  • K. Slifer
  • S. Sirca
  • R. Snyder
  • P. Solvingnon
  • P. A. Souder
  • M. L. Stutzman
  • R. Subedi
  • R. Suleiman
  • V. Sulkosky
  • W. A. Tobias
  • P. E. Ulmer
  • G. M. Urciuoli
  • K. Wang
  • A. Whitbeck
  • R. Wilson
  • B. Wojsekhowsi
  • H. Yao
  • Y. Ye
  • X. Zhan
  • X. Zheng
  • S. Zhou
  • V. Ziskin
Abstract

We report new measurements of the parity-violating asymmetry APV in elastic scattering of 3 GeV electrons off hydrogen and He4 targets with ⟨θlab⟩≈6.0°. The He4 result is APV=(+6.40±0.23(stat)±0.12(syst))×10−6. The hydrogen result is APV=(−1.58±0.12(stat)±0.04(syst))×10−6. These results significantly improve constraints on the electric and magnetic strange form factors GsE and GsM. We extract GsE=0.002±0.014±0.007 at ⟨Q2⟩=0.077  GeV2, and GsE+0.09GsM=0.007±0.011±0.006 at ⟨Q2⟩=0.109  GeV2, providing new limits on the role of strange quarks in the nucleon charge and magnetization distributions.

Disciplines
Publication Date
2007
Publisher Statement
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.98.032301
Citation Information
A. Acha, K. A. Aniol, D. S. Armstrong, J. Arrington, et al.. "Precision Measurements of the Nucleon Strange Form Factors at Q2∼0.1  GeV^2" Physical Review Letters Vol. 98 (2007)
Available at: http://works.bepress.com/krishna_kumar/5/