Abstract submitted to the
         International Europhysics Conference on High Energy Physics
                  July 12 - 18, 2001, Budapest, Hungary
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             Measurement of high-Q^2 neutral current cross sections 
               in e^-p deep inelastic scattering and an extraction 
                  of the structure function xF_3 at HERA


                    
                               ZEUS Collaboration



                                    Abstract

  The e^-p neutral current deep inelastic scattering double differential 
  cross-section d^2sigma^{e^-p}/dxdQ^2 has been measured for 
  200 < Q^2 < 30000 GeV^2 and 0.005 < x < 0.65 with the ZEUS detector 
  at HERA using an integrated luminosity of 16 pb^{-1}. In addition, 
  measurements of the single differential cross-sections dsigma^{e^-p}/dQ^2 
  and dsigma^{e^-p}/dx have been made. The data sample was collected at 
  a centre-of-mass energy of 318 GeV. The predictions of the Standard Model 
  are in very good agreement with the data. A detailed comparison at 
  high-Q^2 of d^2sigma/dxdQ^2 for e^-p and e^+p scattering is presented. 
  The e^+p sample used for this comparison corresponds to an integrated 
  luminosity of 30 pb^{-1} and was collected at a centre-of-mass energy of 
  300 GeV. An extraction of the structure function xF_3 is also presented.