Measurement of electron-proton neutral current cross sections at high 
           Bjorken-x with the ZEUS detector at HERA

                      ZEUS Collaboration 

                           Abstract 

A new method is employed to measure the neutral current cross section up 
to Bjorken-x values of one with the ZEUS detector at HERA using an 
integrated luminosity of 187 pb-1 of e-p collisions at sqrt(s) = 318 GeV. 
Cross sections have been extracted for Q^2 >= 575 GeV^2. A much improved 
precision with respect to the previous ZEUS publication, which only used 
16.7 pb^-1 of e-p collisions, is acheived, owing to the larger datasample 
and improved kinematic reconstruction methods.The meassurement is well 
descibed by predictions based on the CTEQ6D PDFs.