H1prelim-07-041

Combined QCD-EW fit using polarised data

Reference Stamped preliminary 5.4. including double differential NC cross sections at lower Q2,
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Abstract Using neutral current Deep Inelastic Scattering data at high Q^2 a new Electro-Weak fit is performed. The fit is performed on previously published unpolarised e+p and e-p data taken in 1994-2000, as well as polarised e+p and e-p data taken in 2003-2005. The axial and vector couplings of the Z0 to the light quarks are extracted. The new polarised data provide additional sensitivity to the vector couplings resulting in a significant improvement in precision.
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