New measurement of charge asymmetry $x{F}_3$ from HERA

Abstract

After presenting the recent measurements of neutral current cross section in DIS at HERA, we explain the effect of the $\gamma -Z_0$ interference at the electro-weak scale, visible on these data. Then, the beam charge difference $x{F}_3$ is measured and the interference itself is extracted. Results are discussed in the context of perturbative QCD.

Comments: 4 pages, 3 figures, proceedings of the International Workshop on Positrons at Jefferson Lab (March 25-27, 2009), Thomas Jefferson National Accelerator Facility, Newport News, VA