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[Licence| Download | New Version Template] aebs_v2_0.tar.gz(875 Kbytes)
Manuscript Title: GLISSANDO 2: GLauber Initial-State Simulation AND mOre..., ver. 2
Authors: Maciej Rybczyński, Grzegorz Stefanek, Wojciech Broniowski, Piotr Bozek
Program title: GLISSANDO 2 ver. 2.702
Catalogue identifier: AEBS_v2_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 185(2014)1759
Programming language: C++ with the ROOT libraries.
Computer: Any computer with a C++ compiler and the ROOT environment (optionally with doxygen), tested with Intel Xeon X5650, 2.67 GHz, 2 GB RAM.
Operating system: Linux Ubuntu 7.04-12.04 (gcc 4.1.3-4.6.3), Scientific Linux CERN 5.10 (gcc 4.1.2), ROOT ver. 5.28-5.34/09.
RAM: Below 120 MB
Keywords: Glauber model, Wounded nucleons, Monte Carlo generator, Relativistic heavy-ion collisions, LHC, RHIC, SPS.
PACS: 25.75.-q, 25.75.Dw, 25.75.Ld.
Classification: 17.8.

External routines: ROOT (http://root.cern.ch/drupal/)

Does the new version supersede the previous version?: Yes, however the functionality of GLISSANDO 2 and the format of the input and output files is down-compatible with the original version.

Nature of problem:
Glauber models of the initial state in relativistic heavy-ion collisions.

Solution method:
Glauber Monte-Carlo simulation of collision events, analyzed with ROOT.

Reasons for new version:
This is an updated and largely enhanced version of the program GLISSANDO. The structure of the C++ code has been simplified and the organization of the package is restructured.

Summary of revisions:
The new features implemented in GLISSANDO 2 include:
  • parametrization of shape of all typical nuclei, including light nuclei. This is useful in applications for the NA61 experiment, where the mass-number scan will be carried out.
  • inclusion of the deformation of the colliding nuclei. In particular, the deformation effects are relevant for the collisions involving the deformed Au and U nuclei recently used at RHIC.
  • possibility of using correlated distributions of nucleons in nuclei, which may be read-in from external files prepared earlier with other codes. Certainly, the two-body correlations are important, as they influence the fluctuations.
  • generalization of the NN collision profile a shape which interpolates between the step function and a Gaussian profile. Such an extension is relevant for the collisions at the LHC energies, allowing reproduction of the measured values of both the total and elastic NN cross sections.
  • inclusion of the negative binomial overlaid distribution (in addition to the Poissonian and Gamma distributions).
  • possibility of overlaying distributions of the produced particles which depend on the space-time rapidity. This feature extends the model into a fully 3+1 dimensional tool.
  • inclusion of the core-corona effect.
  • a doxygen-generated reference manual is available, which is useful for those who wish to alter the code for their needs.

Additional comments:
Optional software - doxygen (http://www.stack.nl/~dimitri/doxygen/)

Running time:
80 s/10000 events for the wounded-nucleon model and 100 s/10000 events for the mixed model with the Γ distribution, minimum-bias Pb+Pb collisions and hard-sphere wounding profile. A typical high-statistics "physics" run with 500000 events takes about 1 hour. The use of the Gaussian wounding profile increases the time by about a factor of 2. (All times for Intel Xeon X5650, 2.67 GHz, 2 GB RAM)