System-size and energy dependence of particle momentum spectra: The UrQMD analysis of p+p and Pb+Pb collisions

Abstract

The UrQMD transport model is used to study a system-size and energy dependence of the pion production in high energy collisions. New data of the NA61/SHINE Collaboration on spectra of negatively charged pions in proton-proton interactions at SPS energies are considered. These results are compared with the corresponding data of the NA49 Collaboration in central Pb+Pb collisions at the same collision energies per nucleon. Mean pion multiplicity per participant nucleon, inverse slope parameter of the transverse momentum spectra, and width of rapidity distribution are investigated. A role of isospin effects is discussed. We find that the UrQMD model predicts a non-monotonous behavior of mean transverse mass with collision energy for positively charged pions at the mid-rapidity in inelastic proton-proton interactions. This will be checked soon experimentally by NA61/SHINE Collaboration.

arXiv comment21 pages, 13 figures

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Cited by in corpus (10)

• Hadron multiplicities and chemical freeze-out conditions in proton-proton and nucleus-nucleus collisions
• Event-by-event fluctuations in p+p and central A+A collisions within relativistic transport models
• Energy dependence of hadron spectra and multiplicities in p+p interactions
• Mean transverse mass of hadrons in proton-proton reactions
• Signature of the Fragmentation of a Color Flux Tube
• Energy dependence of hadron spectra and yields in p+p and ${}^7$Be+${}^9$Be collisions from the NA61/SHINE experiment at the CERN SPS
• Transverse momentum spectra of hadrons in $p+p$ collisions at CERN SPS energies from the UrQMD transport model
• Recent results from NA61/SHINE
• Pseudorapidity Window Size Dependence of Multiplicity Fluctuations in High-Energy Collisions with System Size and Beam Energies
• Generalized binomial transform applied to the divergent series