Measurement of high-Q2 charged current deep inelastic scattering e+p cross sections with longitudinally polarised positrons in ZEUS at HERA

The cross sections for charged current deep inelastic scattering 
in e+p collisions with a longitudinally polarised positron beam were 
measured using the ZEUS detector at HERA. The results, based on data
corresponding to an integrated luminosity of 140 pb-1 at sqrt{s}=318 GeV, 
are given for both positive and negative values of the longitudinal 
polarisation of the positron beam. The differential cross sections d#/dQ2,
d#/dx and d#/dy for Q2>200 GeV2 are presented. In addition d2#/dxdQ2 was
measured in the kinematic range 280 GeV2 < Q2 < 30000 GeV2 and 
0.015 < x < 0.65. The measured cross sections are compared to the predictions 
of the Standard Model.