Parity-violating electron scattering at the MAMI facility in Mainz

The strangeness contribution to the form factors of the nucleon
  • F. E. Maas
Conference paper


A measurement of the weak form factor of the proton allows a separation of the strangeness contribution to the electromagnetic form factors. The weak form factor is accessed experimentally by the measurement of a parity violating (PV) asymmetry in the scattering of polarized electrons on unpolarized protons. We performed such measurements with the setup of the A4-experiment at the MAMI accelerator facility in Mainz. The role of strangeness in low energy nonperturbative QCD is discussed. The A4-experiment is presented as well as the results on the strangeness form factors which have been measured at two Q 2-values. The plans for backward angle measurements at the MAMI facility are presented.


Form Factor Strange Quark Electromagnetic Form Factor Readout Electronic Hydrogen Target 
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Copyright information

© Società Italiana di Fisica / Springer-Verlag 2006

Authors and Affiliations

  • F. E. Maas
    • 1
  1. 1.Institut de Physique Nucléaire, CNRS/IN2P3Université de Paris SudOrsay CedexFrance

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