Charged particle multiplicities in deep inelastic scattering at HERA

Using the H1 detector at HERA, charged particle multiplicity distributions in deep inelastic ep scattering have been measured over a large kinematical region. The evolution with

W

and

Q~2

of the multiplicity distribution and of the multiplicity moments in pseudorapidity domains of varying size is studied in the current fragmentation region of the hadronic centre-of-mass frame. The results are compared with data from fixed target lepton-nucleon interactions,

e~+e~-

annihilations and hadron-hadron collisions as well as with expectations from QCD based parton models. Fits to the Negative Binomial and Lognormal distributions are presented.

Note:

40 pages, latex, 8 Figures Report-no: DESY 96-160

positron positron: colliding beams
positron positron: deep inelastic scattering
hadron: multiple production
charged particle: multiplicity
multiplicity: moment
energy dependence
dependence: momentum transfer
rapidity dependence
statistical analysis
scaling: KNO

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