Orateur
Trevor Stewart
(DESY)
Description
The cross sections for neutral current deep inelastic scattering in
e+p collisions with a longitudinally polarised positron beam have been
measured using the ZEUS detector at HERA. The single-differential
cross-sections dsigma/dQ^2, dsigma/dx and dsigma/dy and the
double-differential cross sections in Q^2 and x are measured in the
kinematic region Q^2 > 185 GeV^2 for both positively and negatively
polarised electron beams and for each polarisation state separately.
The measurements are based on an integrated luminosity of 136 pb^-1
taken in 2006 and 2007 at a centre-of-mass energy of 318 GeV.
The structure functions xF_3 and xF_3^{\gammaZ} are determined
by combining the e+p results presented in this analysis
with previously measured e-p neutral current data.
The measured cross sections are compared to the predictions.
Auteur principal
Prof.
Collaboration ZEUS
(Tel Aviv University)
