Status and plans for neutral weak form factors measurements

  • K. S. KumarEmail author


We report on a mature experimental program to measure the parity-violating asymmetry in the elastic scattering of longitudinally polarized electrons from unpolarized 1H, 2H and 4He targets. The focus is the measurement of the nucleon neutral weak form factors at intermediate four-momentum transfer (0.1 < Q 2 < 1) (GeV/c)2 which provide information about the impact of virtual strange quarks on the charge and current distributions inside nucleons. We report on recent technical progress in the design and scope of the experimental techniques. The physics implications of the published measurements are discussed and the current status and anticipated results from experiments under construction are summarized.


Form Factor Experimental Technique Elastic Scattering Weak Form Current Distribution 
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  1. 1.
    Ya.B. Zel’dovich, Zh. Eksp. Teor. Fiz. 36, 964 (1959).Google Scholar
  2. 2.
    C.Y. Prescott, Phys. Lett. B 84, 524 (1979).CrossRefGoogle Scholar
  3. 3.
    K.S. Kumar and P.A. Souder, Prog. Part. Nucl. Phys. 45, S333 (2000).Google Scholar
  4. 4.
    D.B. Kaplan, A. Manohar, Nucl. Phys. B 310, 527 (1988).CrossRefGoogle Scholar
  5. 5.
    R.D. McKeown, Phys. Lett. B 219, 140 (1989).CrossRefGoogle Scholar
  6. 6.
    D.H. Beck, Phys. Rev. D 39, 3248 (1989).CrossRefGoogle Scholar
  7. 7.
    M.J. Musolf, Phys. Rep. 239, 1 (1994), and references therein.CrossRefGoogle Scholar
  8. 8.
    D.H. Beck, B.R. Holstein, Int. J. Mod. Phys. E 10, 1 (2001).CrossRefGoogle Scholar
  9. 9.
    D. Spayde, Phys. Rev. Lett. 84, 1106 (2000).CrossRefGoogle Scholar
  10. 10.
    R. Hasty, Science 290, 2117 (2000).CrossRefGoogle Scholar
  11. 11.
    K.A. Aniol, Phys. Lett. B 509, 211 (2001).CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  1. 1.Department of PhysicsUniversity of MassachusettsAmherstUSA

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