H1 and ZEUS

Electroweak Neutral Currents at HERA

Reference H1 & ZEUS combined results, presented by V. Chekelian at ICHEP 06, Summer 2006
Document Conference paper or talk
Figures  (1)  (2)
Contact M. Klein, E. Rizvi, V. Chekelian
Abstract Measurements by the H1 and ZEUS collaborations of the neutral current cross sections of deep inelastic polarised electron and positron-proton scattering are combined in order to investigate the interference of weak and electromagnetic interactions at high four-momentum transfer squared, Q2. The data provide the most accurate measurements of the interference structure function xF3^{gamma Z}, which is sensitive to the valence quark distributions down to lower values of Bjorken x. The data on polarised cross section asymmetries, A^{\pm}, lead to the first observation of parity violation in neutral current e^{\pm} p scattering at distances down to 10^{-18} m.
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