Measurement of high-Q2 neutral-current e+p deep inelastic scattering cross-sections at HERA
The ZEUS Collaboration
J. Breitweg - et al.
Received: 18 May 1999 / Published online: 3 August 1999
The e+p neutral-current deep inelastic scattering differential cross-sections , for Q2 > 400 , and , for Q2> 400, 2500 and 10000 , have been measured with the ZEUS detector at HERA. The data sample of 47.7 pb-1 was collected at a center-of-mass energy of 300 . The cross-section, , falls by six orders of magnitude between Q2 = 400 and 40000 . The predictions of the Standard Model are in very good agreement with the data. Complementing the observations of time-like Z0 contributions to fermion-antifermion annihilation, the data provide direct evidence for the presence of Z0 exchange in the space-like region explored by deep inelastic scattering.