EPJ

2023 Impact factor 4.2
EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 11, 427-445
DOI 10.1007/s100529900188

Measurement of high-Q2 neutral-current e+p deep inelastic scattering cross-sections at HERA

The ZEUS Collaboration

J. Breitweg - et al.

Argonne National Laboratory, Argonne, IL, USA

Received: 18 May 1999 / Published online: 3 August 1999

Abstract
The e+p neutral-current deep inelastic scattering differential cross-sections $d\sigma/d{Q^{2}}$, for Q2 > 400  ${\rm Ge\kern -0.1em V}^{2}$, $d\sigma/dx$ and $d\sigma/dy$, for Q2> 400, 2500 and 10000  ${\rm Ge\kern -0.1em V}^{2}$, 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  ${\rm Ge\kern -0.1em V}$. The cross-section, $d\sigma/d{Q^{2}}$, falls by six orders of magnitude between Q2 = 400 and 40000  ${\rm Ge\kern -0.1em V}^{2}$. 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.

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