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Strange quarks in the nucleon sea

Results from HAPPEX II

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.

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Aniol, K.A., Collaboration, H. Strange quarks in the nucleon sea. Eur. Phys. J. A 31, 597–599 (2007). https://doi.org/10.1140/epja/i2006-10207-5

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  • DOI: https://doi.org/10.1140/epja/i2006-10207-5

PACS.

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