Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-08-20
Eur.Phys.J.C70:945-963,2010
Physics
High Energy Physics
High Energy Physics - Experiment
33 pages, 11 figures, 7 tables
Scientific paper
10.1140/epjc/s10052-010-1498-9
Measurements of the cross sections for charged current deep inelastic scattering in e+p collisions with a longitudinally polarised positron beam are presented. The measurements are based on a data sample with an integrated luminosity of 132 pb^-1 collected with the ZEUS detector at HERA at a centre-of-mass energy of 318 GeV. The total cross section is presented at positive and negative values of the longitudinal polarisation of the positron beams. The single-differential cross-sections ds/dQ^2, ds/dx and ds/dy are presented for Q^2 > 200 GeV^2. The reduced cross-section is presented in the kinematic range 200 < Q^2 < 60,000 GeV^2 and 0.006 < x < 0.562. The measurements agree well with the predictions of the Standard Model. The results are used to determine a lower limit on the mass of a hypothetical right-handed W boson.
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