| Abstract | The inclusive single differential cross section $d\sigma/dQ^2$ and
the reduced double differential cross section
$\tilde{\sigma}(x,Q^2)$ are presented for the neutral current process,
$e^{\pm}p \rightarrow e^{\pm} X$, in interactions with longitudinally
polarised lepton beams using the complete HERA-II data set. The cross
sections are measured in the region of large negative four-momentum
transfer squared $Q^2 \geq 200$ GeV$^2$ and inelasticity
$y<0.9$. The data are consistent with the expected $Q^2$ dependence of
polarised cross sections. The data
are compared to predictions of the Standard Model which is able to
provide a good description of the data. |
