Measurement of High-Q2 Neutral Current Deep Inelastic e+p Scattering Cross Sections with a Longitudinally Polarised Positron Beam at HERAFaculty Publications
AbstractMeasurements of neutral current cross sections for deep inelastic scattering in e+p collisions at HERA with a longitudinally polarised positron beam are presented. The single-differential cross-sections dσ/dQ2, dσ/dx and dσ/dy and the reduced cross-section ˜σ were measured in the kinematic region Q2 > 185GeV2 and y < 0.9, where Q2 is the four-momentum transfer squared, x the Bjorken scaling variable, and y the inelasticity of the interaction. The measurements were performed separately for positively and negatively polarised positron beams. The measurements are based on an integrated luminosity of 135.5 pb−1 collected with the ZEUS detector in 2006 and 2007 at a centre-of-mass energy of 318GeV. The structure functions F˜3 and F Z 3 were determined by combining the e+p results presented in this paper with previously published e−p neutral current results. The asymmetry parameter A+ is used to demonstrate the parity violation predicted in electroweak interactions. The measurements are well described by the predictions of the Standard Model.
Citation InformationMargarita Mattingly and ZEUS Collaboration. "Measurement of High-Q2 Neutral Current Deep Inelastic e+p Scattering Cross Sections with a Longitudinally Polarised Positron Beam at HERA" (2012)
Available at: http://works.bepress.com/margarita_mattingly/9/