Structure Functions at Very High Q^2 From HERA

TL;DR

This paper reports measurements of deep-inelastic scattering at HERA, revealing the structure functions at very high Q^2 and confirming electroweak effects consistent with the Standard Model.

Contribution

First extraction of the parity violating structure function xF_3 at high Q^2 using combined electron and positron data from HERA.

Findings

Observation of electroweak effects consistent with the Standard Model.

First measurement of the parity violating structure function xF_3 at high Q^2.

Validation of the Standard Model predictions at very high momentum transfer.

Abstract

Measurements of Deep-Inelastic Neutral and Charged current interactions are presented in lepton proton scattering at HERA. The measurements are obtained from taken during 1996 to 1999 and consists of $30 \rm{pb^{-1}}$ of $e^+p$ and $16 \rm{pb^{-1}}$ of $e^-p$ data. The addition of the new high statistics electron data with the positron data allows the first extraction of the parity violating structure function $xF_3$ and tests of high-$Q^2$ electroweak effects of the heavy bosons $Z^0$ and $W$ are observed and found to be consistent with the Standard Model expectation.