TGlauberMC is hosted by Hepforge, IPPP Durham

TGlauberMC: A ROOT-based implementation of the PHOBOS Glauber Monte Carlo

Authors: Burak Alver (MIT), Mark Baker (BNL), Constantin Loizides (MIT), Peter Steinberg (BNL)
Brookhaven National Laboratory (BNL) & Massachusetts Institute of Technology (MIT)

"Glauber" models are used to calculate geometric quantities in the initial state of heavy ion collisions, such as impact parameter, number of participating nucleons and initial eccentricity. The four RHIC experiments have different methods for Glauber Model calculations, leading to similar results for various geometric observables. In this document, we describe an implementation of the Monte Carlo based Glauber Model calculation used by the PHOBOS experiment. The assumptions that go in the calculation are described. A user's guide, arXiv:0805.4411, is provided for running various calculations.

An updated version (v2) by C. Loizides (LBNL), J. Nagle (Colorado U.), P. Steinberg (BNL) is described in arXiv:1408.2549, which includes Tritium, Helium-3, and Uranium, as well as the treatment of deformed nuclei and Glauber-Gribov fluctuations of the proton in p+A collisions.

An improved version (v3) by C. Loizides (ORNL), J. Kamin (UiC), D. d'Enterria (CERN) is described in arXiv:1710.07098, which for Pb nuclei includes separated 2-parameter Fermi distributions for protons and neutrons, and can model the nucleon degrees of freedom inside the nucleus through a lattice with a minimum nodal separation, combined with a "recentering and reweighting" procedure, that overcomes some limitations of previous MCG approaches. It includes precision results for BNL RHIC 200 GeV (AuAu, CuCu), CERN LHC (including XeXe), LHC-HE and FCC collision energies.

For the latest release see the TGlauberMC downloads page.

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 v3.0:
  Major update to include separate profile for protons and neutrons, placement of nucleon dof on lattice, 
  as well as reweighted profiles for recentering, see https://arxiv.org/abs/1710.07098
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 v2.4: 
  Minor update to include Xenon and fix of the TGlauberMC::Draw function, 
  see see https://arxiv.org/abs/1408.2549v4
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 v2.3: 
  Small bugfixes, see https://arxiv.org/abs/1408.2549v3
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 v2.2:
  Minor update to provide higher harmonic eccentricities up to n=5, and the average
  nucleon--nucleon impact parameter (bNN) in tree output. 
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 v2.1: 
  Minor update to include more proton pdfs, see https://arxiv.org/abs/1408.2549v2
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 v2.0: 
  First major update with inclusion of tritium, Helium-3, and Uranium, as well as the 
  treatment of deformed nuclei and Glauber-Gribov fluctuations of the proton in p+A 
  collisions, see https://arxiv.org/abs/1408.2549v1
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 v1.1: 
  First public release of the PHOBOS MC Glauber, see https://arxiv.org/abs/0805.4411
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