Orateur
Trevor Stewart
(DESY)
Description
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
in 2006 and 2007 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
dsigma/dQ2, dsigma/dx and dsigma/dy are presented for Q2 > 200 GeV2. The
reduced double-differential cross section sigma_r is presented in the
kinematic range
280 < Q2 < 30 000 GeV2 and 0.0078 < x < 0.42. The cross section
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.
Auteur principal
Prof.
Collaboration ZEUS
(Tel Aviv University)
