2018 Impact factor 4.843
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.



© Società Italiana di Fisica, Springer-Verlag 2003