- Author
-
H. Abramowicz
[Unknown] et al.
G. Grigorescu
A. Keramidas
E. Koffeman
P. Kooijman
A. Pellegrino
H. Tiecke
M. Vázquez
L. Wiggers - Year
- 2013
- Title
- Measurement of high-Q2 neutral current deep inelastic e+p scattering cross sections with a longitudinally polarized positron beam at HERA
- Journal
- Physical Review D. Particles, Fields, Gravitation, and Cosmology
- Volume | Issue number
- 87 | 5
- Article number
- 052014
- Number of pages
- 29
- Document type
- Article
- Faculty
- Faculty of Science (FNWI)
- Institute
- Institute for High Energy Physics (IHEF)
- Abstract
-
Measurements of neutral current cross sections for deep inelastic scattering in e+p collisions at HERA with a longitudinally polarized positron beam are presented. The single-differential cross-sections dσ/dQ2, dσ/dx and dσ/dy and the reduced cross section σ˜ are measured in the kinematic region Q2>185 GeV2 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 are performed separately for positively and negatively polarized 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 center-of-mass energy of 318 GeV. The structure functions F˜3 and FγZ3 are 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.
- URL
- go to publisher's site
- Language
- English
- Note
- ZEUS Collaboration
- Persistent Identifier
- https://hdl.handle.net/11245/1.406642
- Downloads
-
Measurement of high-Q2(Final published version)
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