803 research outputs found
High energy hadron production Monte Carlos
We discuss here Quantum molecular dynamics models (QMD) and Dual Parton
Models (DPM and QGSM). We compare RHIC data to DPM--models and we present a
(Cosmic ray oriented) model comparison.Comment: 10 pages, 7 figures, presented at Hadronic Shower simulation
workshop, FERMILAB Sept. 6-8, 200
Baryon stopping in high energy collisions and the extrapolation of hadron production models to Cosmic Ray energies
A new striking feature of hadron production in nuclear collisions is the
large stopping of the participating nucleons in hadron-nucleus and
nucleus-nucleus collisions. This enhanced baryon stopping can be understood
introducing new diquark breaking mechanisms in multistring models of hadron
production. Here we show, that similar diquark breaking mechanisms occur at
high energy even in hadron-hadron collisions. This effect leads to significant
changes in the extrapolation of these models to Cosmic Ray energies.Comment: 18 pages, LATEX using revtex.sty, 21 postscript figure
DTUJET--93 Sampling inelastic proton--proton and antiproton--proton collisions according to the two--component Dual Parton Model
A new version of a Monte Carlo Program for hadronic multi-particle production
is presented. It is based on the two-component Dual Parton Model which includes
the dual topological unitarization of soft and hard cross sections. The model
treats both soft (low ) and hard (minijet, large )
processes in a unified and consistent way. The unified description is important
at TeV-energies of hadron colliders, where the hard perturbative cross sections
of QCD become large and comparable to the total cross sections.Comment: 20 pages , PHYSZZX, SI-93-
Cosmic Ray particle production
The status of some popular models to simulate hadronic and nuclear interactions at Cosmic Ray energies is reviewed. The models predict the rise of all the hadronic and nuclear cross sections with energy and a smooth (logarithmic) rise of average multiplicities, rapidity plateaus and average transverse momenta with the energy. The importance is stressed to put more effort into the models and especially a better understanding of the minijet component at the highest energies. Likewise, experimental data on particle production are needed at the highest possible energies, to guide the models
d-Au and p-p collisions at RHIC and the multichain Monte Carlo Dpmjet-III
In this paper we compare systematically the two-component Dual Parton Model
(DPM) event generator Dpmjet-III to d-Au and p-p data from RHIC. In this
process we are able to improve the model. The need for fusion of chains and a
recalibration of the model to obtain collision scaling in h-A and d-A
collisions was found already in previous comparisons. Here, comparing to
transverse momentum distributions of identified charged hadrons we find also
the need to modify the transverse momentum distributions in the decay of
hadronic strings, the basic building blocks of the model on soft hadronic
collisions.Comment: 8 pages, 13 figures, Based on a contribution to a workshop "QCD at
Cosmic Energies, Erice, Italie, Aug.29 to Sept.5 200
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