Measurement of charged current deep inelastic scattering cross sections with a longitudinally polarised electron beam at HERA

European Physical Journal C (Impact Factor: 5.44). 01/2009; 61(2):223-235. DOI: 10.1140/epjc/s10052-009-1015-1

ABSTRACT Measurements of the cross sections for charged current deep inelastic scattering in e

p collisions with longitudinally polarised electron beams are presented. The measurements are based on a data sample with an
integrated luminosity of 175 pb−1 collected with the ZEUS detector at HERA at a centre-of-mass energy of 318GeV. The total cross section is given for positively
and negatively polarised electron beams. The differential cross-sections d
2, d
σ/dx and d
σ/dy are presented for Q
2>200 GeV2. The double-differential cross-section d
2 is presented in the kinematic range 280<Q
2<30 000 GeV2 and 0.015<x<0.65. The measured cross sections are compared with the predictions of the Standard Model.

Download full-text


Available from: Iurii Sorokin, Jun 28, 2015
1 Follower
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: New measurements of neutral and charged current cross sections at large negative four-momentum transfer squared Q^2 have been performed by H1 and ZEUS, using up to the complete HERA II ep data, which was taken with polarised electron and positron beams. The data are compared to predictions of the Standard Model, based on various parton distribution function parameterisations. The polarisation asymmetry of the neutral current interaction is measured as a function of Q^2, as well as the polarisation dependence of the charged current cross section and both are found to be in agreement with the Standard Model expectation. The HERA II cross sections are also combined with previously published HERA I data to obtain the most precise unpolarised measurements. Comment: 4 pages, 6 figures, to appear in the proceedings of Lake Louise Winter Institute 2010, Feb 15-20 2010 (version 2: corrected 3 typos)
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The prospects for making a direct measurement of the W production charge asymmetry at the LHC are discussed. A modification to the method used at the Tevatron is proposed for measurements at the LHC. The expected sensitivity for such a measurement to parton distribution functions is compared to that for a measurement of the lepton charge asymmetry. The direct measurement approach is found to be less useful for placing constraints on parton distribution functions at the LHC than a measurement of the lepton charge asymmetry. KeywordsHadron-Hadron Scattering
    Journal of High Energy Physics 05/2010; 2010(9):1-19. DOI:10.1007/JHEP09(2010)079 · 6.22 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Contribution to a conf. proceeding (book/online) Temporary entry (new)