Measurement of high Q**2 e- p neutral current cross-sections at HERA and the extraction of xF(3)

Cross sections for e^-p neutral current deep inelastic scattering have been measured at a centre-of-mass energy of 318 GeV using an integrated luminosity of 15.9 pb^-1 collected with the ZEUS detector at HERA. Results on the double-differential cross-section d^2s/dxdQ^2 in the range 185 < Q^2 < 50000 GeV^2 and 0.0037 < x < 0.75, as well as the single-differential cross-sections ds/dQ^2, ds/dx and ds/dy for Q^2 > 200 GeV^2, are presented. To study the effect of Z-boson exchange, ds/dx has also been measured for Q^2 > 10000 GeV^2. The structure function xF_3 has been extracted by combining the e^-p results presented here with the recent ZEUS measurements of e^+p neutral current deep inelastic scattering. All results agree well with the predictions of the Standard Model.

Note:

48 pages, 9 figures: accepted by The European Physical Journal: revised version corrects small errors in the cross sections at high y due to handling of FL Report-no: DESY-02-113

electron p: colliding beams
electron p: deep inelastic scattering
neutral current
p: structure function
momentum transfer: high
differential cross section: x-dependence
momentum transfer dependence
electroweak interaction: validity test
ZEUS
experimental results

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