Measurement of high-Q deep inelastic scattering cross sections with longitudinally polarised positron beams at HERA
نویسنده
چکیده
The first measurements of the cross sections for neutral and charged current deep inelastic scattering in ep collisions with longitudinally polarised positron beams are presented. The total cross section for ep charged current deep inelastic scattering is presented at positive and negative values of positron beam longitudinal polarisation for an integrated luminosity of 37.0 pb H1 data and 30.5 pb ZEUS data collected in 2003 and 2004 at a centre-ofmass energy of 319 GeV. In addition, the ZEUS collaboration measured the single differential cross sections for charged and neutral current deep inelastic scattering in the kinematic region Q > 200GeV. The measured cross sections are compared with the predictions of the Standard Model. The H1 collaboration extrapolate the cross section to a fully left handed positron beam and find it to be consistent with the Standard Model expectation.
منابع مشابه
Tables of cross sections with the systematic uncertainties listed separately for: Measurement of high-Q neutral current deep inelastic ep scattering cross sections with a longitudinally polarised positron beam at HERA
Addendum to DESY-12-145 Measurements of neutral current cross sections for deep inelastic scattering in ep collisions at HERA with a longitudinally polarised positron beam are presented. The single-differential cross-sections dσ/dQ, dσ/dx and dσ/dy and the reduced cross-section σ̃ were measured in the kinematic region Q > 185GeV and y < 0.9, where Q is the four-momentum transfer squared, x the B...
متن کاملInclusive high Q cross sections and QCD and EW fits at HERA
The latest measurements of the cross sections for neutral and charged current deep inelastic scattering in ep collisions at HERA with longitudinally polarised lepton beams are presented. The measured cross sections are compared with the predictions of the Standard Model. Next-to-leading-order QCD analyses of HERA data are also presented. The analyses yield the parton distribution functions of t...
متن کاملThe Structure Functions and Low X Working Group Summary
The structure functions and low x working group summary of DIS06. 1. Recent results from HERA We begin by discussing new results from HERA. In autumn 2003 the accelerator started the second phase of its ep collider programme (HERA-II). The e + p and e − p data collected by the H1 and ZEUS experiments since then, were taken with longitudinally polarised positron and electron beams for the first ...
متن کاملMeasurement of High-Q2 Charged and Neutral Current Deep Inelastic ep Scattering Cross Sections with a Longitudinally Polarised Positron Beam at HERA
the mass of a hypothetical right-handed W boson.The single differential NC (CC) cross sections dσ/dQ2, dσ/dx and dσ/dy are presented for Q2 > 185 GeV2 (Q2 > 200 GeV2). The reduced NC (CC) cross sections σ̃ are presented. The structure function xF̃3 is determined by combining the e+p NC reduced cross sections with the previously measured e−p [2] measurements. Reduced cross sections from a high-Q2 ...
متن کاملELECTROWEAK PHYSICS AT HERA J. ˇ Sutiak on behalf of the H1 and ZEUS collaborations
Neutral-current (NC) and charged-current (CC) deep inelastic scattering (DIS) interactions have been studied in e + p and e − p collisions with longitudinally polarised lepton beams using the H1 and ZEUS detectors at HERA. Measurements of the polarised inclusive cross-sections are presented and compared to the Standard Model (SM) expectations. The extraction of several electroweak parameters us...
متن کامل