High Q^2 Measurements from HERA

Details High Q^2 Measurements from HERA High Q^2 Measurements from HERA

2010-05-31

arxiv.org/abs/1005.5729v2

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 6 figures, to appear in the proceedings of Lake Louise Winter Institute 2010, Feb 15-20 2010 (version 2: corrected 3

Scientific paper

New measurements of neutral and charged current cross sections at large negative four-momentum transfer squared Q^2 have been performed by H1 and ZEUS, using up to the complete HERA II ep data, which was taken with polarised electron and positron beams. The data are compared to predictions of the Standard Model, based on various parton distribution function parameterisations. The polarisation asymmetry of the neutral current interaction is measured as a function of Q^2, as well as the polarisation dependence of the charged current cross section and both are found to be in agreement with the Standard Model expectation. The HERA II cross sections are also combined with previously published HERA I data to obtain the most precise unpolarised measurements.

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