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arXiv · 1308.0736

Toward UrQMD Model Description of pp and pC Interactions at High Energies

V. Uzhinsky
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Abstract

It is found that UrQMD model version 3.3 does not describe NA61/SHINE Collaboration data on π-meson production in pp interactions at energies 20 - 80 GeV. At the same time, it describes quite well the NA49 Collaboration data on the meson production in pp and pC interactions at 158 GeV. The Collaborations do not consider feedback of η-meson decays. All versions of the UrQMD model assume that η-mesons are "stable". An inclusion of the decays into calculations leads to 2--3 % increase of the meson production which is not enough for description of the data. Possible ways of the model improvements are considered. Conclusions of the paper are: accounting of η-meson decays is not essential for a description of experimental data; a new tuning of the UrQMD model parameters is needed for a successful description of pp and pC interactions at high energies; inclusion of the low mass diffraction dissociation in the UrQMD model would be desirable.

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V. Uzhinsky. 2013-11-05. Toward UrQMD Model Description of pp and pC Interactions at High Energies. https://arxiv.org/abs/1308.0736

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