High-Q^2 neutral current cross sections in e^+p deep inelastic scattering at sqrt{s}=318 GeV

Details High-Q^2 neutral current cross sections in e^+p deep inelastic scattering at sqrt{s}=318 GeV High-Q^2 neutral current cross sections in e^+p deep inelastic scattering at sqrt{s}=318 GeV

2004-01-07

arxiv.org/abs/hep-ex/0401003v3

Phys.Rev.D70:052001,2004

Physics

High Energy Physics

High Energy Physics - Experiment

Two references corrected. To be published in Physical Review D

Scientific paper

10.1103/PhysRevD.70.052001

Cross sections for e^+p neutral current deep inelastic scattering have been measured at a centre-of-mass energy of sqrt{s}=318 GeV with the ZEUS detector at HERA using an integrated luminosity of 63.2 pb^-1. The double-differential cross section, d^2sigma/dxdQ^2, is presented for 200 GeV^2 < Q^2 < 30000 GeV^2 and for 0.005 < x < 0.65. The single-differential cross-sections dsigma/dQ^2, dsigma/dx and dsigma/dy are presented for Q^2 > 200 GeV^2. The effect of Z-boson exchange is seen in dsigma/dx measured for Q^2 > 10000 GeV^2. The data presented here were combined with ZEUS e^+p neutral current data taken at sqrt{s}=300 GeV and the structure function F_2^{em} was extracted. All results agree well with the predictions of the Standard Model.

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