Scaled momentum spectra in deep inelastic scattering at HERA - INSPIRE

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Scaled momentum spectra in deep inelastic scattering at HERA

ZEUS

Collaboration

Jan, 2010

44 pages

Published in:

JHEP 06 (2010) 009,
JHEP 10 (2010) 030 (erratum)

e-Print:

1001.4026 [hep-ex]

DOI:

Report number:

DESY-09-229

View in:

ADS Abstract Service

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Abstract: (arXiv)

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 GeV^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.

Note:

44 pages, 11 figures, 21 tables

25.75.Dw
Lepton-Nucleon Scattering
current: fragmentation
electron p: deep inelastic scattering
quantum chromodynamics: perturbation theory
Breit frame
momentum spectrum
charged particle: multiplicity
neutral current
rapidity spectrum

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Figures(0)

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