Scaled momentum spectra in deep inelastic scattering at HERA
Document Type
Article
Publication Date
1-1-2010
Abstract
Charged particle production has been studied in neutral current deep inelastic ep scattering with the ZEUS detector at HERA using an integrated luminosity of 0.44 fb(-1). Distributions of scaled momenta in the Breit frame are presented for particles in the current fragmentation region. The evolution of these spectra with the photon virtuality, Q(2), is described in the kinematic region 10 < Q(2) < 41000 Ge V-2. Next-to-leading-order and modified leading-log-approximation QCD calculations as well as predictions from Monte Carlo models are compared to the data. The results are also compared to e(+)e(-) annihilation data. The dependences of the pseudorapidity distribution of the particles on Q(2) and on the energy in the gamma p system, W, are presented and interpreted in the context of the hypothesis of limiting fragmentation.
Keywords
Lepton-Nucleon Scattering
Publication Title
Journal of High Energy Physics
Issue
6
Publisher
Springer
Publisher Location
233 SPRING ST, NEW YORK, NY 10013 USA