Measurement of high-$Q^2$ $e^-p$ neutral current cross sections at HERA and the extraction of $xF_3$

The ZEUS collaboration

doi:doi:10.1140/epjc/s2003-01163-y

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2024 Impact factor 4.8

Particles and Fields

Eur. Phys. J. C 28, 175-201 (2003)
DOI: 10.1140/epjc/s2003-01163-y

Measurement of high- Q² e^-p neutral current cross sections at HERA and the extraction of xF₃

The ZEUS collaboration

(Received: 2 August 2002 / Revised version: 30 January 2003 / Published online: 24 March 2003 )

Abstract
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-sec tion $d^2\sigma / dx\,dQ^2$ in the range $185 < Q^2 < 50\,000$ GeV ² and 0.0037 < x < 0.75, as well as the single-differential cross-sec tions $d\sigma / dQ^2$ , $d\sigma / dx$ and $d\sigma / dy$ for Q² > 200 GeV ², are presented. To study the effect of Z-boson exchange, $d\sigma / dx$ has also been measured for $Q^2 > 10\,000$ GeV ². The structure function xF₃ 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.