VNI-4.1: Simulation of space-time evolution of e^+e^- .... A+B collisions with parton-cascades, parton-hadron conversion, final-state hadron cascades

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dc.creatorGeiger, Klaus
dc.creatorLongacre, Ron
dc.creatorSrivastava, Dinesh K.
dc.date1998-06-30
dc.date.accessioned2026-07-07T05:42:29Z
dc.date.available2026-07-07T05:42:29Z
dc.descriptionVNI is a general-purpose Monte-Carlo event-generator, which includes the simulation of lepton-lepton, lepton-hadron, lepton-nucleus, hadron-hadron, hadron-nucleus, and nucleus-nucleus collisions. It uses the real-time evolution of parton cascades in conjunction with a self-consistent hadronization scheme, as well as the development of hadron cascades after hadronization. The causal evolution from a specific initial state (determined by the colliding beam particles) is followed by the time-development of the phase-space densities of partons, pre-hadronic parton clusters, and final-state hadrons, in position-space, momentum-space and color-space. The parton-evolution is described in terms of a space-time generalization of the familiar momentum-space description of multiple (semi)hard interactions in QCD, involving 2 -> 2 parton collisions, 2 -> 1 parton fusion processes, and 1 -> 2 radiation processes. The formation of color-singlet pre-hadronic clusters and their decays into hadrons, on the other hand, is treated by using a spatial criterion motivated by confinement and a non-perturbative model for hadronization. Finally, the cascading of produced pre-hadronic clusters and of hadrons is includes a multitude of 2 -> n processes, and is modeled in paralell to the parton cascade description. This paper gives a brief review of the physics underlying VNI, as well as a detailed description of the program itself. The latter program description emphasizes easy-to-use pragmatism and explains how to use the program (including simple examples), annotates input and control parameters, and discusses output data provided by it.
dc.description112 pages, contains physics description and user manual
dc.identifierhttps://arxiv.org/abs/nucl-th/9806102
dc.identifierhttp://arxiv.org/abs/nucl-th/9806102
dc.identifierComput.Phys.Commun. 104 (1997) 70
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/82950
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.titleVNI-4.1: Simulation of space-time evolution of e^+e^- .... A+B collisions with parton-cascades, parton-hadron conversion, final-state hadron cascades
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