Momentum spectra in the current region of the Breit frame in deep inelastic scattering at HERA
N Brook; the ZEUS Collaboration; N Brook; Department of Physics and Astronomy, University of Glasgow, Glasgow, UK; the ZEUS Collaboration; Department of Physics and Astronomy, University of Glasgow, Glasgow, UK
Журнал:
Journal of Physics G: Nuclear and Particle Physics
Дата:
1999-07-01
Аннотация:
The production of charged particles has been measured in deep inelastic scattering with the ZEUS detector. The evolution of the moments of the scaled momenta distributions in Q<sup>2</sup> and x has been investigated in the current fragmentation region of the Breit frame. The results in the current region are compared to e<sup>+</sup>e<sup>-</sup> data and QCD analytical calculations. The results are consistent with the universality of single-particle spectra in DIS and e<sup>+</sup>e<sup>-</sup> annihilation at high Q<sup>2</sup>. The results at low Q<sup>2</sup> disagree with analytical calculations based on the modified leading log approximation and local parton hadron duality.
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