Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The specific charged hadron multiplicity in ep and eD semi-inclusive
  deep-inelastic scattering in the PYTHIA and PACIAE models   We employed the PYTHIA 6.4 model and the extended parton and hadron cascade
model PACIAE 2.2 to comparatively investigate the DIS normalized specific
charged hadron multiplicity in the 27.6 GeV electron semi-inclusive
deep-inelastic scattering off proton and deuteron. The PYTHIA and PACIAE
results calculated with default model parameters not well and fairly well
reproduce the corresponding HERMES data, respectively. In addition, we have
discussed the effects of the differences between the PYTHIA and PACIAE models.

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The categories of this paper are: supr-con
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The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: math
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: physics
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: plasm-ph