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The European Physical Journal A

, Volume 31, Issue 4, pp 597–599 | Cite as

Strange quarks in the nucleon sea

Results from HAPPEX II
  • K. A. Aniol
  • HAPPEX Collaboration
QNP 2006

Abstract.

The HAPPEX Collaboration measured parity-violating electron scattering from

4He$(e, e)$and

H(e, e) in 2004 and 2005 for Q 2≤0.11GeV^2. Results for the strange-quark contributions to the electromagnetic form factors of the nucleon from the 2004 data will be reviewed. Preliminary results from the 2005 data, which have significantly greater statistical precision, are G E s = 0.004±0.014stat±0.013syst for Q 2 = 0.0772GeV^2 from the helium data and G E s +0.088G M s = 0.004±0.011stat±0.005syst±0.004FF for Q 2 = 0.1089GeV^2 from the hydrogen data.

PACS.

14.20.Dh Protons and neutrons 13.40.Gp Electromagnetic form factors 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • K. A. Aniol
    • 1
  • HAPPEX Collaboration
    • 2
  1. 1.Physics and Astronomy DepartmentCalifornia State UniversityLos AngelesUSA
  2. 2.Jefferson LabNewport NewsUSA

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