Atomic Mass Dependence of Hadron Production in Deep Inelastic Scattering on Nuclei

Details Atomic Mass Dependence of Hadron Production in Deep Inelastic Scattering on Nuclei Atomic Mass Dependence of Hadron Production in Deep Inelastic Scattering on Nuclei

2005-02-08

arxiv.org/abs/hep-ph/0502072v4

Nucl.Phys. A761 (2005) 67-91

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 10 figures, v2: minor changes (legend in figs 5 & 6 is added), v3: additional explanations are added, v4: Version co

Scientific paper

10.1016/j.nuclphysa.2005.05.201

Hadron production in lepton-nucleus deep inelastic scattering is studied in an absorption model. In the proposed model, the early stage of hadronization in the nuclear medium is dominated by prehadron formation and absorption, controlled by flavor-dependent formation lengths and absorption cross sections. Computations for hadron multiplicity ratios are presented and compared with the HERMES experimental data for pions, kaons, protons and antiprotons. The mass-number dependence of hadron attenuation is shown to be sensitive to the underlying hadronization dynamics. Contrary to common expectations for absorption models, a leading term proportional to A^{2/3} is found. Deviations from the leading behavior arise at large mass-numbers and large hadron fractional momenta.

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