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Inclusive charged particle distributions in deep inelastic scattering events at HERA
Journal article

Inclusive charged particle distributions in deep inelastic scattering events at HERA

ZEUS Collaboration, J Repond, U Mallik and E McCliment
Zeitschrift für Physik. C, Particles and fields, Vol.70(1), pp.1-15
03/01/1996
DOI: 10.1007/s002880050075
url
https://arxiv.org/pdf/hep-ex/9511010View
Open Access

Abstract

A measurement of inclusive charged particle distributions in deep inelastic ep scattering for gamma*p centre-of-mass energies 75 < W < 175 GeV and momentum transfer squared 10 < Q(2) < 160 GeV2 from the ZEUS detector at HERA is presented. The differential charged particle rates in the gamma*p centre-of-mass system as a function of the scaled longitudinal momentum, x(F), and of the transverse momentum, p(t)* and [p(t)(*2)], as a function of x(F), W and Q(2) are given, Separate distributions are shown for events with (LRG) and without (NRG) a rapidity gap with respect to the proton direction. The data are compared with results from experiments at lower beam energies, with the naive quark parton model and with parton models including perturbative QCD corrections, The comparison shows the importance of the higher order QCD processes. Significant differences of the inclusive charged particle rates between NRG and LRG events at the same W are observed, The value of [p(t)(*2)] for LRG events with a hadronic mass M(X), which excludes the forward produced baryonic system, is similar to the [p(t)(*2)] value observed in fixed target experiments at W approximate to M(X).
 Physical Sciences Physics Physics, Particles & Fields Science & Technology

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