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GiBUU

GiBUU

The GiBUU project is aiming to provide an unified transport framework in the MeV and GeV energy regimes for

elementary reactions on nuclei, as e.g.
- electron + A,
- photon + A,
- neutrino + A ,
- hadron + A (especially pion + A)

and for heavy-ion collisions.

For those reactions, the flow of particles is modelled within a Boltzmann-Uehling-Uhlenbeck (BUU) framework. The relevant degrees of freedom are mesons and baryons, which propagate in mean fields and scatter according to cross sections which are tuned to the energy range of 10 MeV to more than 10 GeV.

The new numerical implementation, named GiBUU (standing for Gießen and BUU), is written in modular Fortran2003 and based upon a Subversion version control system, which allows for a concise control over the full development phase of the code.

The history of the code is rather long and reports about several main development steps. The present initiative accomplished a total rewrite of the source code in a present-day computing language. The main goals of this effort were modularization to allow for a more transparent multi-user development process, a strict reduction of global variables for a more transparent debugging procedure, an improved control over the development phase such that modifications can be backtracked and a unified standard version. Therefore every member of the team works on the same single code version, albeit different temporal branches may coexist. Possible technical overhead is compensated by the benefit of a faster distribution of improvements and innovations and their enhanced sustainability.

GiBUU is being developed at the Institut für Theoretische Physik of the Justus-Liebig-Universität Giessen.

Physics Input

History of the code

Learn more about our model

Publications, Talks and Seminars

Publications and theses of the GiBUU team

Presentations at DPG Spring Meeting 2007 (March 12-17):
- O. Buss: Electron and pion scattering off nuclei pdf
- T. Gaitanos: Hypernucleus formation in high-energy nuclear collisions ppt
- K. Gallmeister: Time Dependent Hadronization via HERMES and EMC Data Consistency ppt
- A. Larionov: Three-baryon collisions in BUU
- T. Leitner: Neutrino induced pion production and nucleon knockout within the GiBUU transport model pdf

O. Buss: "Code development & pion DCX", Gießen, Seminar, July 2006. pdf

Visualisations

pion induced reactions (low energy) (movie #1, movie #2)

The GiBUU Code

GiBUU Documentation
Used software and tools
Selected Links connected to (Fortran) Programming
- Fortran informations
- O. Buss: "Some short intro to modern Fortran", Gießen, Seminar, May 2005. pdf (for f77 devotees)
- Literature